Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

12 files changed, 4992 insertions, 0 deletions

diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/ExpRCUFlow.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/ExpRCUFlow.svg
new file mode 100644
index 000000000..7c6c90bd0
--- /dev/null
+++ b/Documentation/RCU/Design/Expedited-Grace-Periods/ExpRCUFlow.svg
@@ -0,0 +1,830 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Creator: fig2dev Version 3.2 Patchlevel 5e -->
+
+<!-- CreationDate: Wed Dec  9 17:39:46 2015 -->
+
+<!-- Magnification: 3.000 -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="952.6817"
+   height="1219.6219"
+   viewBox="-66 -66 12729.905 16296.808"
+   id="svg2"
+   version="1.1"
+   inkscape:version="0.48.4 r9939"
+   sodipodi:docname="ExpRCUFlow.svg">
+  <metadata
+     id="metadata94">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <defs
+     id="defs92">
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend"
+       style="overflow:visible">
+      <path
+         id="path4146"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Mend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Mend"
+       style="overflow:visible">
+      <path
+         id="path3852"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt"
+         transform="matrix(-0.4,0,0,-0.4,-4,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Mend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Mend-9"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path3852-7"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt"
+         transform="matrix(-0.4,0,0,-0.4,-4,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-7"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4146-6"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-1"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4146-4"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-16"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4146-8"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-160"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4146-5"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-78"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4146-66"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-8"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4146-56"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-19"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4146-89"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-85"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4146-3"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-73"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4146-55"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-5"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4146-88"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-198"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4146-2"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-4"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4146-22"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker5072"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path5074"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-87"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4146-63"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-6"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4146-26"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-0"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4146-51"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+    </marker>
+  </defs>
+  <sodipodi:namedview
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1"
+     objecttolerance="10"
+     gridtolerance="10"
+     guidetolerance="10"
+     inkscape:pageopacity="0"
+     inkscape:pageshadow="2"
+     inkscape:window-width="1090"
+     inkscape:window-height="1148"
+     id="namedview90"
+     showgrid="true"
+     inkscape:zoom="0.80021373"
+     inkscape:cx="462.49289"
+     inkscape:cy="623.19585"
+     inkscape:window-x="557"
+     inkscape:window-y="24"
+     inkscape:window-maximized="0"
+     inkscape:current-layer="g4"
+     inkscape:snap-grids="false"
+     fit-margin-top="5"
+     fit-margin-right="5"
+     fit-margin-bottom="5"
+     fit-margin-left="5" />
+  <g
+     style="fill:none;stroke-width:0.025in"
+     id="g4"
+     transform="translate(23.312813,523.41305)">
+    <!-- Line: box -->
+    <!-- Line: box -->
+    <!-- Line: box -->
+    <!-- Line: box -->
+    <!-- Line: box -->
+    <!-- Line: box -->
+    <!-- Line: box -->
+    <!-- Line -->
+    <!-- Arrowhead on XXXpoint 11475 2250 - 11475 3465-->
+    <!-- Line: box -->
+    <!-- Line: box -->
+    <!-- Line: box -->
+    <!-- Line: box -->
+    <!-- Line: box -->
+    <!-- Line -->
+    <!-- Arrowhead on XXXpoint 11475 5625 - 11475 6840-->
+    <!-- Line -->
+    <!-- Arrowhead on XXXpoint 7875 225 - 10665 225-->
+    <!-- Line -->
+    <!-- Arrowhead on XXXpoint 9675 675 - 7785 675-->
+    <!-- Line -->
+    <!-- Arrowhead on XXXpoint 9675 4725 - 10665 4725-->
+    <!-- Line -->
+    <!-- Arrowhead on XXXpoint 9225 5175 - 10665 5175-->
+    <!-- Line -->
+    <!-- Arrowhead on XXXpoint 8775 11475 - 10665 11475-->
+    <!-- Line: box -->
+    <!-- Line -->
+    <!-- Arrowhead on XXXpoint 11475 9000 - 11475 10215-->
+    <!-- Text -->
+    <!-- Text -->
+    <!-- Text -->
+    <!-- Text -->
+    <!-- Text -->
+    <!-- Text -->
+    <!-- Text -->
+    <!-- Text -->
+    <!-- Text -->
+    <!-- Text -->
+    <!-- Text -->
+    <!-- Text -->
+    <!-- Text -->
+    <g
+       id="g4104"
+       transform="translate(-1068.9745,0)">
+      <rect
+         transform="matrix(-0.70710678,0.70710678,-0.70710678,-0.70710678,0,0)"
+         y="-7383.8755"
+         x="-6124.8989"
+         height="1966.2251"
+         width="1953.6969"
+         id="rect3032-1-0"
+         style="fill:#96ff96;fill-opacity:1;stroke:#000000;stroke-width:45.00382233;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <text
+         sodipodi:linespacing="125%"
+         id="text4098"
+         y="818.40338"
+         x="8168.2671"
+         style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         xml:space="preserve"><tspan
+           y="818.40338"
+           x="8168.2671"
+           id="tspan4100"
+           sodipodi:role="line">Idle or</tspan><tspan
+           id="tspan4102"
+           y="1152.4579"
+           x="8168.2671"
+           sodipodi:role="line">offline?</tspan></text>
+    </g>
+    <g
+       id="g4114"
+       transform="translate(0,147.96969)">
+      <rect
+         id="rect6"
+         style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+         rx="0"
+         height="1475.6636"
+         width="4401.7612"
+         y="0"
+         x="0" />
+      <text
+         sodipodi:linespacing="125%"
+         id="text4110"
+         y="835.11212"
+         x="2206.4917"
+         style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         xml:space="preserve"><tspan
+           y="835.11212"
+           x="2206.4917"
+           id="tspan4112"
+           sodipodi:role="line">CPU N Start</tspan></text>
+    </g>
+    <path
+       style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)"
+       d="M 4432.5052,897.4924 5684.8749,880.79414"
+       id="path4119"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cc" />
+    <path
+       style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)"
+       d="M 8503.0006,874.12161 9755.3703,857.42334"
+       id="path4119-8"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cc" />
+    <text
+       xml:space="preserve"
+       style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+       x="8617.0977"
+       y="705.50983"
+       id="text4593"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan4595"
+         x="8617.0977"
+         y="705.50983">Y</tspan></text>
+    <g
+       style="fill:none;stroke-width:0.025in"
+       id="g4114-9"
+       transform="translate(9722.4732,131.27105)">
+      <rect
+         id="rect6-0"
+         style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+         rx="0"
+         height="1425.5687"
+         width="2748.6331"
+         y="0"
+         x="80.17308" />
+      <text
+         sodipodi:linespacing="125%"
+         id="text4110-5"
+         y="835.11212"
+         x="1460.1007"
+         style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         xml:space="preserve"><tspan
+           y="835.11212"
+           x="1460.1007"
+           id="tspan4112-9"
+           sodipodi:role="line">Done</tspan></text>
+    </g>
+    <g
+       style="fill:none;stroke-width:0.025in"
+       id="g4114-5"
+       transform="translate(0,3705.3456)">
+      <rect
+         id="rect6-1"
+         style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+         rx="0"
+         height="1475.6636"
+         width="4401.7612"
+         y="0"
+         x="0" />
+      <text
+         sodipodi:linespacing="125%"
+         id="text4110-9"
+         y="835.11212"
+         x="2206.4917"
+         style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         xml:space="preserve"><tspan
+           y="835.11212"
+           x="2206.4917"
+           sodipodi:role="line"
+           id="tspan4776">Send IPI to CPU N</tspan></text>
+    </g>
+    <path
+       style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)"
+       d="M 7102.5627,2263.5171 4430.8404,3682.8694"
+       id="path4119-3"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cc" />
+    <g
+       style="fill:none;stroke-width:0.025in"
+       id="g4104-1"
+       transform="translate(-1065.3349,6403.5782)">
+      <rect
+         transform="matrix(-0.70710678,0.70710678,-0.70710678,-0.70710678,0,0)"
+         y="-7383.8755"
+         x="-6124.8989"
+         height="1966.2251"
+         width="1953.6969"
+         id="rect3032-1-0-6"
+         style="fill:#96ff96;fill-opacity:1;stroke:#000000;stroke-width:45.00382233;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <text
+         sodipodi:linespacing="125%"
+         id="text4098-3"
+         y="482.00006"
+         x="8168.2671"
+         style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         xml:space="preserve"><tspan
+           id="tspan4102-8"
+           y="482.00006"
+           x="8168.2671"
+           sodipodi:role="line">In RCU</tspan><tspan
+           y="816.05457"
+           x="8168.2671"
+           sodipodi:role="line"
+           id="tspan4833">read-side</tspan><tspan
+           y="1150.109"
+           x="8168.2671"
+           sodipodi:role="line"
+           id="tspan4835">critical</tspan><tspan
+           y="1484.1636"
+           x="8168.2671"
+           sodipodi:role="line"
+           id="tspan4837">section?</tspan></text>
+    </g>
+    <text
+       xml:space="preserve"
+       style="font-size:267.24362183px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+       x="6463.0864"
+       y="2285.6765"
+       id="text4593-0"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan4595-6"
+         x="6463.0864"
+         y="2285.6765">N</tspan></text>
+    <path
+       style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654108, 80.17308215;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)"
+       d="m 2189.1897,5219.361 16.6983,1252.3697"
+       id="path4119-0"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cc" />
+    <g
+       style="fill:none;stroke-width:0.025in"
+       id="g4114-5-2"
+       transform="translate(0,6551.5479)">
+      <rect
+         id="rect6-1-7"
+         style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+         rx="0"
+         height="1475.6636"
+         width="4401.7612"
+         y="0"
+         x="0" />
+      <text
+         sodipodi:linespacing="125%"
+         id="text4110-9-5"
+         y="835.11212"
+         x="2206.4917"
+         style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         xml:space="preserve"><tspan
+           y="835.11212"
+           x="2206.4917"
+           sodipodi:role="line"
+           id="tspan4776-5">IPI Handler</tspan></text>
+    </g>
+    <path
+       style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)"
+       d="m 4432.5052,7297.9678 1252.3697,-16.6982"
+       id="path4119-2"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cc" />
+    <path
+       style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)"
+       d="m 8503.0013,7278.6595 1252.369,-16.6982"
+       id="path4119-8-7"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cc" />
+    <text
+       xml:space="preserve"
+       style="font-size:267.24362183px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+       x="8617.0977"
+       y="7110.0186"
+       id="text4593-4"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan4595-0"
+         x="8617.0977"
+         y="7110.0186">N</tspan></text>
+    <g
+       style="fill:none;stroke-width:0.025in"
+       id="g4114-9-3"
+       transform="translate(9722.4732,6535.809)">
+      <rect
+         id="rect6-0-7"
+         style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+         rx="0"
+         height="1425.5687"
+         width="2748.6331"
+         y="29.467337"
+         x="80.17308" />
+      <text
+         sodipodi:linespacing="125%"
+         id="text4110-5-7"
+         y="503.71591"
+         x="1460.1007"
+         style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         xml:space="preserve"><tspan
+           y="503.71591"
+           x="1460.1007"
+           id="tspan4112-9-0"
+           sodipodi:role="line">Report CPU</tspan><tspan
+           y="837.77039"
+           x="1460.1007"
+           sodipodi:role="line"
+           id="tspan4923">Quiescent</tspan><tspan
+           y="1171.825"
+           x="1460.1007"
+           sodipodi:role="line"
+           id="tspan4925">State</tspan></text>
+    </g>
+    <path
+       style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654335, 80.17308669;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)"
+       d="m 7102.5627,8725.7454 16.6983,1252.3697"
+       id="path4119-0-0"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cc" />
+    <text
+       xml:space="preserve"
+       style="font-size:267.24362183px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+       x="6797.0522"
+       y="9018.6807"
+       id="text4593-3"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan4595-2"
+         x="6797.0522"
+         y="9018.6807">Y</tspan></text>
+    <g
+       style="fill:none;stroke-width:0.025in"
+       id="g4114-9-3-8"
+       transform="translate(-80.17308,11381.108)">
+      <rect
+         id="rect6-0-7-5"
+         style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+         rx="0"
+         height="1425.5687"
+         width="2748.6331"
+         y="29.467337"
+         x="80.17308" />
+      <text
+         sodipodi:linespacing="125%"
+         id="text4110-5-7-6"
+         y="841.88086"
+         x="1460.1007"
+         style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         xml:space="preserve"><tspan
+           y="841.88086"
+           x="1460.1007"
+           sodipodi:role="line"
+           id="tspan4925-1">rcu_read_unlock()</tspan></text>
+    </g>
+    <path
+       style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654562, 80.17309124;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)"
+       d="m 1362.6256,10071.26 16.6983,1252.369"
+       id="path4119-0-0-7"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cc" />
+    <path
+       style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)"
+       d="m 1362.6256,12883.919 16.6983,1252.369"
+       id="path4119-0-0-7-7"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cc" />
+    <g
+       style="fill:none;stroke-width:0.025in"
+       id="g4114-9-3-8-1"
+       transform="translate(9722.4732,11389.458)">
+      <rect
+         id="rect6-0-7-5-1"
+         style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+         rx="0"
+         height="1425.5687"
+         width="2748.6331"
+         y="29.467337"
+         x="80.17308" />
+      <text
+         sodipodi:linespacing="125%"
+         id="text4110-5-7-6-2"
+         y="841.88086"
+         x="1460.1007"
+         style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         xml:space="preserve"><tspan
+           y="841.88086"
+           x="1460.1007"
+           sodipodi:role="line"
+           id="tspan4925-1-2">Context Switch</tspan></text>
+    </g>
+    <path
+       style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654789, 80.17309578;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)"
+       d="m 11165.272,10071.26 16.698,1252.369"
+       id="path4119-0-0-7-8"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cc" />
+    <g
+       style="fill:none;stroke-width:0.025in"
+       id="g4114-9-3-9"
+       transform="translate(-80.17308,14163.046)">
+      <rect
+         id="rect6-0-7-1"
+         style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+         rx="0"
+         height="1425.5687"
+         width="2748.6331"
+         y="29.467337"
+         x="80.17308" />
+      <text
+         sodipodi:linespacing="125%"
+         id="text4110-5-7-3"
+         y="503.71591"
+         x="1460.1007"
+         style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         xml:space="preserve"><tspan
+           y="503.71591"
+           x="1460.1007"
+           id="tspan4112-9-0-4"
+           sodipodi:role="line">Report CPU</tspan><tspan
+           y="837.77039"
+           x="1460.1007"
+           sodipodi:role="line"
+           id="tspan4923-3">and Task</tspan><tspan
+           y="1171.825"
+           x="1460.1007"
+           sodipodi:role="line"
+           id="tspan4925-9">Quiescent States</tspan></text>
+    </g>
+    <g
+       style="fill:none;stroke-width:0.025in"
+       id="g4114-9-3-8-1-8"
+       transform="translate(5663.2978,11389.458)">
+      <rect
+         id="rect6-0-7-5-1-1"
+         style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+         rx="0"
+         height="1425.5687"
+         width="2748.6331"
+         y="29.467337"
+         x="80.17308" />
+      <text
+         sodipodi:linespacing="125%"
+         id="text4110-5-7-6-2-4"
+         y="841.88086"
+         x="1460.1007"
+         style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         xml:space="preserve"><tspan
+           y="841.88086"
+           x="1460.1007"
+           sodipodi:role="line"
+           id="tspan4925-1-2-4">Enqueue Task</tspan></text>
+    </g>
+    <path
+       style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)"
+       d="M 9827.612,12141.988 8575.243,12125.29"
+       id="path4119-8-7-5"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cc" />
+    <path
+       style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)"
+       d="m 7106.0965,12818.962 16.6983,1252.369"
+       id="path4119-0-0-7-7-5"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cc" />
+    <g
+       style="fill:none;stroke-width:0.025in"
+       id="g4114-9-3-9-2"
+       transform="translate(5663.2978,14098.088)">
+      <rect
+         id="rect6-0-7-1-8"
+         style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+         rx="0"
+         height="1425.5687"
+         width="2748.6331"
+         y="29.467337"
+         x="80.17308" />
+      <text
+         sodipodi:linespacing="125%"
+         id="text4110-5-7-3-4"
+         y="503.71591"
+         x="1460.1007"
+         style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         xml:space="preserve"><tspan
+           y="503.71591"
+           x="1460.1007"
+           sodipodi:role="line"
+           id="tspan4923-3-2">Report CPU</tspan><tspan
+           y="837.77039"
+           x="1460.1007"
+           sodipodi:role="line"
+           id="tspan4925-9-9">Quiescent</tspan><tspan
+           y="1171.825"
+           x="1460.1007"
+           sodipodi:role="line"
+           id="tspan5239">State</tspan></text>
+    </g>
+    <path
+       style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654562, 80.17309124;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)"
+       d="M 5733.305,14095.542 2761.014,12809.774"
+       id="path4119-0-0-2"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cc" />
+    <path
+       style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654107, 80.17308214;stroke-dashoffset:0"
+       d="m 1353.3524,10079.499 9701.6916,0 100.189,-16.698"
+       id="path5265"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="ccc" />
+  </g>
+</svg>
diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/ExpSchedFlow.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/ExpSchedFlow.svg
new file mode 100644
index 000000000..6189ffcc6
--- /dev/null
+++ b/Documentation/RCU/Design/Expedited-Grace-Periods/ExpSchedFlow.svg
@@ -0,0 +1,830 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Creator: fig2dev Version 3.2 Patchlevel 5e -->
+
+<!-- CreationDate: Wed Dec  9 17:39:46 2015 -->
+
+<!-- Magnification: 3.000 -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="952.6817"
+   height="1425.6191"
+   viewBox="-66 -66 12729.905 19049.38"
+   id="svg2"
+   version="1.1"
+   inkscape:version="0.48.4 r9939"
+   sodipodi:docname="ExpSchedFlow.svg">
+  <metadata
+     id="metadata94">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <defs
+     id="defs92">
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend"
+       style="overflow:visible">
+      <path
+         id="path4146"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Mend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Mend"
+       style="overflow:visible">
+      <path
+         id="path3852"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt"
+         transform="matrix(-0.4,0,0,-0.4,-4,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Mend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Mend-9"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path3852-7"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt"
+         transform="matrix(-0.4,0,0,-0.4,-4,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-7"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4146-6"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-1"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4146-4"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-16"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4146-8"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-160"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4146-5"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-78"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4146-66"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-8"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4146-56"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-19"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4146-89"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-85"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4146-3"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-73"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4146-55"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-5"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4146-88"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-198"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4146-2"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-4"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4146-22"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker5072"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path5074"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-87"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4146-63"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-6"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4146-26"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-0"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4146-51"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-58"
+       style="overflow:visible">
+      <path
+         id="path4146-61"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+  </defs>
+  <sodipodi:namedview
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1"
+     objecttolerance="10"
+     gridtolerance="10"
+     guidetolerance="10"
+     inkscape:pageopacity="0"
+     inkscape:pageshadow="2"
+     inkscape:window-width="1090"
+     inkscape:window-height="1148"
+     id="namedview90"
+     showgrid="true"
+     inkscape:zoom="0.69092787"
+     inkscape:cx="476.34085"
+     inkscape:cy="712.80957"
+     inkscape:window-x="770"
+     inkscape:window-y="24"
+     inkscape:window-maximized="0"
+     inkscape:current-layer="g4"
+     inkscape:snap-grids="false"
+     fit-margin-top="5"
+     fit-margin-right="5"
+     fit-margin-bottom="5"
+     fit-margin-left="5" />
+  <g
+     style="fill:none;stroke-width:0.025in"
+     id="g4"
+     transform="translate(23.312814,523.41265)">
+    <!-- Line: box -->
+    <!-- Line: box -->
+    <!-- Line: box -->
+    <!-- Line: box -->
+    <!-- Line: box -->
+    <!-- Line: box -->
+    <!-- Line: box -->
+    <!-- Line -->
+    <!-- Arrowhead on XXXpoint 11475 2250 - 11475 3465-->
+    <!-- Line: box -->
+    <!-- Line: box -->
+    <!-- Line: box -->
+    <!-- Line: box -->
+    <!-- Line: box -->
+    <!-- Line -->
+    <!-- Arrowhead on XXXpoint 11475 5625 - 11475 6840-->
+    <!-- Line -->
+    <!-- Arrowhead on XXXpoint 7875 225 - 10665 225-->
+    <!-- Line -->
+    <!-- Arrowhead on XXXpoint 9675 675 - 7785 675-->
+    <!-- Line -->
+    <!-- Arrowhead on XXXpoint 9675 4725 - 10665 4725-->
+    <!-- Line -->
+    <!-- Arrowhead on XXXpoint 9225 5175 - 10665 5175-->
+    <!-- Line -->
+    <!-- Arrowhead on XXXpoint 8775 11475 - 10665 11475-->
+    <!-- Line: box -->
+    <!-- Line -->
+    <!-- Arrowhead on XXXpoint 11475 9000 - 11475 10215-->
+    <!-- Text -->
+    <!-- Text -->
+    <!-- Text -->
+    <!-- Text -->
+    <!-- Text -->
+    <!-- Text -->
+    <!-- Text -->
+    <!-- Text -->
+    <!-- Text -->
+    <!-- Text -->
+    <!-- Text -->
+    <!-- Text -->
+    <!-- Text -->
+    <g
+       id="g4104"
+       transform="translate(-1068.9745,0)">
+      <rect
+         transform="matrix(-0.70710678,0.70710678,-0.70710678,-0.70710678,0,0)"
+         y="-7383.8755"
+         x="-6124.8989"
+         height="1966.2251"
+         width="1953.6969"
+         id="rect3032-1-0"
+         style="fill:#96ff96;fill-opacity:1;stroke:#000000;stroke-width:45.00382233;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <text
+         sodipodi:linespacing="125%"
+         id="text4098"
+         y="818.40338"
+         x="8168.2671"
+         style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         xml:space="preserve"><tspan
+           y="818.40338"
+           x="8168.2671"
+           id="tspan4100"
+           sodipodi:role="line">Idle or</tspan><tspan
+           id="tspan4102"
+           y="1152.4579"
+           x="8168.2671"
+           sodipodi:role="line">offline?</tspan></text>
+    </g>
+    <g
+       id="g4114"
+       transform="translate(0,147.96969)">
+      <rect
+         id="rect6"
+         style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+         rx="0"
+         height="1475.6636"
+         width="4401.7612"
+         y="0"
+         x="0" />
+      <text
+         sodipodi:linespacing="125%"
+         id="text4110"
+         y="835.11212"
+         x="2206.4917"
+         style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         xml:space="preserve"><tspan
+           y="835.11212"
+           x="2206.4917"
+           id="tspan4112"
+           sodipodi:role="line">CPU N Start</tspan></text>
+    </g>
+    <path
+       style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)"
+       d="M 4432.5052,897.4924 5684.8749,880.79414"
+       id="path4119"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cc" />
+    <path
+       style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)"
+       d="M 8503.0006,874.12161 9755.3703,857.42334"
+       id="path4119-8"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cc" />
+    <text
+       xml:space="preserve"
+       style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+       x="8617.0977"
+       y="705.50983"
+       id="text4593"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan4595"
+         x="8617.0977"
+         y="705.50983">Y</tspan></text>
+    <g
+       style="fill:none;stroke-width:0.025in"
+       id="g4114-9"
+       transform="translate(9722.4732,131.27105)">
+      <rect
+         id="rect6-0"
+         style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+         rx="0"
+         height="1425.5687"
+         width="2748.6331"
+         y="0"
+         x="80.17308" />
+      <text
+         sodipodi:linespacing="125%"
+         id="text4110-5"
+         y="835.11212"
+         x="1460.1007"
+         style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         xml:space="preserve"><tspan
+           y="835.11212"
+           x="1460.1007"
+           id="tspan4112-9"
+           sodipodi:role="line">Done</tspan></text>
+    </g>
+    <g
+       style="fill:none;stroke-width:0.025in"
+       id="g4114-5"
+       transform="translate(0,3705.3456)">
+      <rect
+         id="rect6-1"
+         style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+         rx="0"
+         height="1475.6636"
+         width="4401.7612"
+         y="0"
+         x="0" />
+      <text
+         sodipodi:linespacing="125%"
+         id="text4110-9"
+         y="835.11212"
+         x="2206.4917"
+         style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         xml:space="preserve"><tspan
+           y="835.11212"
+           x="2206.4917"
+           sodipodi:role="line"
+           id="tspan4776">Send IPI to CPU N</tspan></text>
+    </g>
+    <path
+       style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)"
+       d="M 7102.5627,2263.5171 4430.8404,3682.8694"
+       id="path4119-3"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cc" />
+    <g
+       style="fill:none;stroke-width:0.025in"
+       id="g4104-1"
+       transform="translate(-1065.3349,6403.5782)">
+      <rect
+         transform="matrix(-0.70710678,0.70710678,-0.70710678,-0.70710678,0,0)"
+         y="-7383.8755"
+         x="-6124.8989"
+         height="1966.2251"
+         width="1953.6969"
+         id="rect3032-1-0-6"
+         style="fill:#96ff96;fill-opacity:1;stroke:#000000;stroke-width:45.00382233;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <text
+         sodipodi:linespacing="125%"
+         id="text4098-3"
+         y="985.4306"
+         x="8168.2671"
+         style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         xml:space="preserve"><tspan
+           y="985.4306"
+           x="8168.2671"
+           sodipodi:role="line"
+           id="tspan3109">CPU idle?</tspan></text>
+    </g>
+    <text
+       xml:space="preserve"
+       style="font-size:267.24362183px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+       x="6463.0864"
+       y="2285.6765"
+       id="text4593-0"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan4595-6"
+         x="6463.0864"
+         y="2285.6765">N</tspan></text>
+    <path
+       style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654108, 80.17308215;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)"
+       d="m 2189.1897,5219.361 16.6983,1252.3697"
+       id="path4119-0"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cc" />
+    <g
+       style="fill:none;stroke-width:0.025in"
+       id="g4114-5-2"
+       transform="translate(0,6551.5479)">
+      <rect
+         id="rect6-1-7"
+         style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+         rx="0"
+         height="1475.6636"
+         width="4401.7612"
+         y="0"
+         x="0" />
+      <text
+         sodipodi:linespacing="125%"
+         id="text4110-9-5"
+         y="835.11212"
+         x="2206.4917"
+         style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         xml:space="preserve"><tspan
+           y="835.11212"
+           x="2206.4917"
+           sodipodi:role="line"
+           id="tspan4776-5">IPI Handler</tspan></text>
+    </g>
+    <path
+       style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)"
+       d="m 4432.5052,7297.9678 1252.3697,-16.6982"
+       id="path4119-2"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cc" />
+    <path
+       style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)"
+       d="m 8503.0013,7278.6595 1252.369,-16.6982"
+       id="path4119-8-7"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cc" />
+    <text
+       xml:space="preserve"
+       style="font-size:267.24362183px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+       x="8617.0977"
+       y="7110.0186"
+       id="text4593-4"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan4595-0"
+         x="8617.0977"
+         y="7110.0186">Y</tspan></text>
+    <g
+       style="fill:none;stroke-width:0.025in"
+       id="g4114-9-3"
+       transform="translate(9722.4732,6535.809)">
+      <rect
+         id="rect6-0-7"
+         style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+         rx="0"
+         height="1425.5687"
+         width="2748.6331"
+         y="29.467337"
+         x="80.17308" />
+      <text
+         sodipodi:linespacing="125%"
+         id="text4110-5-7"
+         y="503.71591"
+         x="1460.1007"
+         style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         xml:space="preserve"><tspan
+           y="503.71591"
+           x="1460.1007"
+           id="tspan4112-9-0"
+           sodipodi:role="line">Report CPU</tspan><tspan
+           y="837.77039"
+           x="1460.1007"
+           sodipodi:role="line"
+           id="tspan4923">Quiescent</tspan><tspan
+           y="1171.825"
+           x="1460.1007"
+           sodipodi:role="line"
+           id="tspan4925">State</tspan></text>
+    </g>
+    <path
+       style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654335, 80.17308669;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)"
+       d="m 7102.5627,11478.337 16.6983,1252.35"
+       id="path4119-0-0"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cc" />
+    <text
+       xml:space="preserve"
+       style="font-size:267.24362183px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+       x="6797.0522"
+       y="9018.6807"
+       id="text4593-3"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan4595-2"
+         x="6797.0522"
+         y="9018.6807">N</tspan></text>
+    <g
+       style="fill:none;stroke-width:0.025in"
+       id="g4114-9-3-8"
+       transform="translate(-80.17308,14133.68)">
+      <rect
+         id="rect6-0-7-5"
+         style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+         rx="0"
+         height="1425.5687"
+         width="2748.6331"
+         y="29.467337"
+         x="80.17308" />
+      <text
+         sodipodi:linespacing="125%"
+         id="text4110-5-7-6"
+         y="841.88086"
+         x="1460.1007"
+         style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         xml:space="preserve"><tspan
+           y="841.88086"
+           x="1460.1007"
+           sodipodi:role="line"
+           id="tspan4925-1">Context Switch</tspan></text>
+    </g>
+    <path
+       style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654562, 80.17309124;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)"
+       d="m 1362.6256,12823.832 16.6983,1252.369"
+       id="path4119-0-0-7"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cc" />
+    <path
+       style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)"
+       d="m 1362.6256,15636.491 16.6983,1252.369"
+       id="path4119-0-0-7-7"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cc" />
+    <g
+       style="fill:none;stroke-width:0.025in"
+       id="g4114-9-3-8-1"
+       transform="translate(9722.4732,14142.03)">
+      <rect
+         id="rect6-0-7-5-1"
+         style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+         rx="0"
+         height="1425.5687"
+         width="2748.6331"
+         y="29.467337"
+         x="80.17308" />
+      <text
+         sodipodi:linespacing="125%"
+         id="text4110-5-7-6-2"
+         y="841.88086"
+         x="1460.1007"
+         style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         xml:space="preserve"><tspan
+           y="841.88086"
+           x="1460.1007"
+           sodipodi:role="line"
+           id="tspan4925-1-2">CPU Offline</tspan></text>
+    </g>
+    <path
+       style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654789, 80.17309578;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)"
+       d="m 11165.272,12823.832 16.698,1252.369"
+       id="path4119-0-0-7-8"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cc" />
+    <g
+       style="fill:none;stroke-width:0.025in"
+       id="g4114-9-3-9"
+       transform="translate(-80.17308,16915.618)">
+      <rect
+         id="rect6-0-7-1"
+         style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+         rx="0"
+         height="1425.5687"
+         width="2748.6331"
+         y="29.467337"
+         x="80.17308" />
+      <text
+         sodipodi:linespacing="125%"
+         id="text4110-5-7-3"
+         y="505.47754"
+         x="1460.1007"
+         style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         xml:space="preserve"><tspan
+           y="505.47754"
+           x="1460.1007"
+           id="tspan4112-9-0-4"
+           sodipodi:role="line">Report CPU</tspan><tspan
+           y="839.53204"
+           x="1460.1007"
+           sodipodi:role="line"
+           id="tspan4925-9">Quiescent</tspan><tspan
+           y="1173.5865"
+           x="1460.1007"
+           sodipodi:role="line"
+           id="tspan3168">State</tspan></text>
+    </g>
+    <path
+       style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)"
+       d="m 11165.272,15571.534 16.698,1252.369"
+       id="path4119-0-0-7-7-5"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cc" />
+    <g
+       style="fill:none;stroke-width:0.025in"
+       id="g4114-9-3-9-2"
+       transform="translate(9722.4732,16850.66)">
+      <rect
+         id="rect6-0-7-1-8"
+         style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+         rx="0"
+         height="1425.5687"
+         width="2748.6331"
+         y="29.467337"
+         x="80.17308" />
+      <text
+         sodipodi:linespacing="125%"
+         id="text4110-5-7-3-4"
+         y="503.71591"
+         x="1460.1007"
+         style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         xml:space="preserve"><tspan
+           y="503.71591"
+           x="1460.1007"
+           sodipodi:role="line"
+           id="tspan4923-3-2">Report CPU</tspan><tspan
+           y="837.77039"
+           x="1460.1007"
+           sodipodi:role="line"
+           id="tspan4925-9-9">Quiescent</tspan><tspan
+           y="1171.825"
+           x="1460.1007"
+           sodipodi:role="line"
+           id="tspan5239">State</tspan></text>
+    </g>
+    <path
+       style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654107, 80.17308214;stroke-dashoffset:0"
+       d="m 1353.3524,12832.071 9701.6916,0 100.189,-16.698"
+       id="path5265"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="ccc" />
+    <path
+       style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)"
+       d="m 7112.6465,8669.1867 16.6983,1252.369"
+       id="path4119-0-0-7-7-5-7"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cc" />
+    <g
+       style="fill:none;stroke-width:0.025in"
+       id="g4114-9-3-8-1-8-3"
+       transform="translate(5663.1399,9972.3627)">
+      <rect
+         id="rect6-0-7-5-1-1-9"
+         style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+         rx="0"
+         height="1425.5687"
+         width="2748.6331"
+         y="29.467337"
+         x="80.17308" />
+      <text
+         sodipodi:linespacing="125%"
+         id="text4110-5-7-6-2-4-0"
+         y="670.74316"
+         x="1460.1007"
+         style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         xml:space="preserve"><tspan
+           y="670.74316"
+           x="1460.1007"
+           sodipodi:role="line"
+           id="tspan4925-1-2-4-5">Request</tspan><tspan
+           y="1004.7976"
+           x="1460.1007"
+           sodipodi:role="line"
+           id="tspan3100">context switch</tspan></text>
+    </g>
+  </g>
+</svg>
diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/Expedited-Grace-Periods.rst b/Documentation/RCU/Design/Expedited-Grace-Periods/Expedited-Grace-Periods.rst
new file mode 100644
index 000000000..72f0f6fbd
--- /dev/null
+++ b/Documentation/RCU/Design/Expedited-Grace-Periods/Expedited-Grace-Periods.rst
@@ -0,0 +1,521 @@
+=================================================
+A Tour Through TREE_RCU's Expedited Grace Periods
+=================================================
+
+Introduction
+============
+
+This document describes RCU's expedited grace periods.
+Unlike RCU's normal grace periods, which accept long latencies to attain
+high efficiency and minimal disturbance, expedited grace periods accept
+lower efficiency and significant disturbance to attain shorter latencies.
+
+There are two flavors of RCU (RCU-preempt and RCU-sched), with an earlier
+third RCU-bh flavor having been implemented in terms of the other two.
+Each of the two implementations is covered in its own section.
+
+Expedited Grace Period Design
+=============================
+
+The expedited RCU grace periods cannot be accused of being subtle,
+given that they for all intents and purposes hammer every CPU that
+has not yet provided a quiescent state for the current expedited
+grace period.
+The one saving grace is that the hammer has grown a bit smaller
+over time:  The old call to ``try_stop_cpus()`` has been
+replaced with a set of calls to ``smp_call_function_single()``,
+each of which results in an IPI to the target CPU.
+The corresponding handler function checks the CPU's state, motivating
+a faster quiescent state where possible, and triggering a report
+of that quiescent state.
+As always for RCU, once everything has spent some time in a quiescent
+state, the expedited grace period has completed.
+
+The details of the ``smp_call_function_single()`` handler's
+operation depend on the RCU flavor, as described in the following
+sections.
+
+RCU-preempt Expedited Grace Periods
+===================================
+
+``CONFIG_PREEMPT=y`` kernels implement RCU-preempt.
+The overall flow of the handling of a given CPU by an RCU-preempt
+expedited grace period is shown in the following diagram:
+
+.. kernel-figure:: ExpRCUFlow.svg
+
+The solid arrows denote direct action, for example, a function call.
+The dotted arrows denote indirect action, for example, an IPI
+or a state that is reached after some time.
+
+If a given CPU is offline or idle, ``synchronize_rcu_expedited()``
+will ignore it because idle and offline CPUs are already residing
+in quiescent states.
+Otherwise, the expedited grace period will use
+``smp_call_function_single()`` to send the CPU an IPI, which
+is handled by ``rcu_exp_handler()``.
+
+However, because this is preemptible RCU, ``rcu_exp_handler()``
+can check to see if the CPU is currently running in an RCU read-side
+critical section.
+If not, the handler can immediately report a quiescent state.
+Otherwise, it sets flags so that the outermost ``rcu_read_unlock()``
+invocation will provide the needed quiescent-state report.
+This flag-setting avoids the previous forced preemption of all
+CPUs that might have RCU read-side critical sections.
+In addition, this flag-setting is done so as to avoid increasing
+the overhead of the common-case fastpath through the scheduler.
+
+Again because this is preemptible RCU, an RCU read-side critical section
+can be preempted.
+When that happens, RCU will enqueue the task, which will the continue to
+block the current expedited grace period until it resumes and finds its
+outermost ``rcu_read_unlock()``.
+The CPU will report a quiescent state just after enqueuing the task because
+the CPU is no longer blocking the grace period.
+It is instead the preempted task doing the blocking.
+The list of blocked tasks is managed by ``rcu_preempt_ctxt_queue()``,
+which is called from ``rcu_preempt_note_context_switch()``, which
+in turn is called from ``rcu_note_context_switch()``, which in
+turn is called from the scheduler.
+
+
++-----------------------------------------------------------------------+
+| **Quick Quiz**:                                                       |
++-----------------------------------------------------------------------+
+| Why not just have the expedited grace period check the state of all   |
+| the CPUs? After all, that would avoid all those real-time-unfriendly  |
+| IPIs.                                                                 |
++-----------------------------------------------------------------------+
+| **Answer**:                                                           |
++-----------------------------------------------------------------------+
+| Because we want the RCU read-side critical sections to run fast,      |
+| which means no memory barriers. Therefore, it is not possible to      |
+| safely check the state from some other CPU. And even if it was        |
+| possible to safely check the state, it would still be necessary to    |
+| IPI the CPU to safely interact with the upcoming                      |
+| ``rcu_read_unlock()`` invocation, which means that the remote state   |
+| testing would not help the worst-case latency that real-time          |
+| applications care about.                                              |
+|                                                                       |
+| One way to prevent your real-time application from getting hit with   |
+| these IPIs is to build your kernel with ``CONFIG_NO_HZ_FULL=y``. RCU  |
+| would then perceive the CPU running your application as being idle,   |
+| and it would be able to safely detect that state without needing to   |
+| IPI the CPU.                                                          |
++-----------------------------------------------------------------------+
+
+Please note that this is just the overall flow: Additional complications
+can arise due to races with CPUs going idle or offline, among other
+things.
+
+RCU-sched Expedited Grace Periods
+---------------------------------
+
+``CONFIG_PREEMPT=n`` kernels implement RCU-sched. The overall flow of
+the handling of a given CPU by an RCU-sched expedited grace period is
+shown in the following diagram:
+
+.. kernel-figure:: ExpSchedFlow.svg
+
+As with RCU-preempt, RCU-sched's ``synchronize_rcu_expedited()`` ignores
+offline and idle CPUs, again because they are in remotely detectable
+quiescent states. However, because the ``rcu_read_lock_sched()`` and
+``rcu_read_unlock_sched()`` leave no trace of their invocation, in
+general it is not possible to tell whether or not the current CPU is in
+an RCU read-side critical section. The best that RCU-sched's
+``rcu_exp_handler()`` can do is to check for idle, on the off-chance
+that the CPU went idle while the IPI was in flight. If the CPU is idle,
+then ``rcu_exp_handler()`` reports the quiescent state.
+
+Otherwise, the handler forces a future context switch by setting the
+NEED_RESCHED flag of the current task's thread flag and the CPU preempt
+counter. At the time of the context switch, the CPU reports the
+quiescent state. Should the CPU go offline first, it will report the
+quiescent state at that time.
+
+Expedited Grace Period and CPU Hotplug
+--------------------------------------
+
+The expedited nature of expedited grace periods require a much tighter
+interaction with CPU hotplug operations than is required for normal
+grace periods. In addition, attempting to IPI offline CPUs will result
+in splats, but failing to IPI online CPUs can result in too-short grace
+periods. Neither option is acceptable in production kernels.
+
+The interaction between expedited grace periods and CPU hotplug
+operations is carried out at several levels:
+
+#. The number of CPUs that have ever been online is tracked by the
+   ``rcu_state`` structure's ``->ncpus`` field. The ``rcu_state``
+   structure's ``->ncpus_snap`` field tracks the number of CPUs that
+   have ever been online at the beginning of an RCU expedited grace
+   period. Note that this number never decreases, at least in the
+   absence of a time machine.
+#. The identities of the CPUs that have ever been online is tracked by
+   the ``rcu_node`` structure's ``->expmaskinitnext`` field. The
+   ``rcu_node`` structure's ``->expmaskinit`` field tracks the
+   identities of the CPUs that were online at least once at the
+   beginning of the most recent RCU expedited grace period. The
+   ``rcu_state`` structure's ``->ncpus`` and ``->ncpus_snap`` fields are
+   used to detect when new CPUs have come online for the first time,
+   that is, when the ``rcu_node`` structure's ``->expmaskinitnext``
+   field has changed since the beginning of the last RCU expedited grace
+   period, which triggers an update of each ``rcu_node`` structure's
+   ``->expmaskinit`` field from its ``->expmaskinitnext`` field.
+#. Each ``rcu_node`` structure's ``->expmaskinit`` field is used to
+   initialize that structure's ``->expmask`` at the beginning of each
+   RCU expedited grace period. This means that only those CPUs that have
+   been online at least once will be considered for a given grace
+   period.
+#. Any CPU that goes offline will clear its bit in its leaf ``rcu_node``
+   structure's ``->qsmaskinitnext`` field, so any CPU with that bit
+   clear can safely be ignored. However, it is possible for a CPU coming
+   online or going offline to have this bit set for some time while
+   ``cpu_online`` returns ``false``.
+#. For each non-idle CPU that RCU believes is currently online, the
+   grace period invokes ``smp_call_function_single()``. If this
+   succeeds, the CPU was fully online. Failure indicates that the CPU is
+   in the process of coming online or going offline, in which case it is
+   necessary to wait for a short time period and try again. The purpose
+   of this wait (or series of waits, as the case may be) is to permit a
+   concurrent CPU-hotplug operation to complete.
+#. In the case of RCU-sched, one of the last acts of an outgoing CPU is
+   to invoke ``rcu_report_dead()``, which reports a quiescent state for
+   that CPU. However, this is likely paranoia-induced redundancy.
+
++-----------------------------------------------------------------------+
+| **Quick Quiz**:                                                       |
++-----------------------------------------------------------------------+
+| Why all the dancing around with multiple counters and masks tracking  |
+| CPUs that were once online? Why not just have a single set of masks   |
+| tracking the currently online CPUs and be done with it?               |
++-----------------------------------------------------------------------+
+| **Answer**:                                                           |
++-----------------------------------------------------------------------+
+| Maintaining single set of masks tracking the online CPUs *sounds*     |
+| easier, at least until you try working out all the race conditions    |
+| between grace-period initialization and CPU-hotplug operations. For   |
+| example, suppose initialization is progressing down the tree while a  |
+| CPU-offline operation is progressing up the tree. This situation can  |
+| result in bits set at the top of the tree that have no counterparts   |
+| at the bottom of the tree. Those bits will never be cleared, which    |
+| will result in grace-period hangs. In short, that way lies madness,   |
+| to say nothing of a great many bugs, hangs, and deadlocks.            |
+| In contrast, the current multi-mask multi-counter scheme ensures that |
+| grace-period initialization will always see consistent masks up and   |
+| down the tree, which brings significant simplifications over the      |
+| single-mask method.                                                   |
+|                                                                       |
+| This is an instance of `deferring work in order to avoid              |
+| synchronization <http://www.cs.columbia.edu/~library/TR-repository/re |
+| ports/reports-1992/cucs-039-92.ps.gz>`__.                             |
+| Lazily recording CPU-hotplug events at the beginning of the next      |
+| grace period greatly simplifies maintenance of the CPU-tracking       |
+| bitmasks in the ``rcu_node`` tree.                                    |
++-----------------------------------------------------------------------+
+
+Expedited Grace Period Refinements
+----------------------------------
+
+Idle-CPU Checks
+~~~~~~~~~~~~~~~
+
+Each expedited grace period checks for idle CPUs when initially forming
+the mask of CPUs to be IPIed and again just before IPIing a CPU (both
+checks are carried out by ``sync_rcu_exp_select_cpus()``). If the CPU is
+idle at any time between those two times, the CPU will not be IPIed.
+Instead, the task pushing the grace period forward will include the idle
+CPUs in the mask passed to ``rcu_report_exp_cpu_mult()``.
+
+For RCU-sched, there is an additional check: If the IPI has interrupted
+the idle loop, then ``rcu_exp_handler()`` invokes
+``rcu_report_exp_rdp()`` to report the corresponding quiescent state.
+
+For RCU-preempt, there is no specific check for idle in the IPI handler
+(``rcu_exp_handler()``), but because RCU read-side critical sections are
+not permitted within the idle loop, if ``rcu_exp_handler()`` sees that
+the CPU is within RCU read-side critical section, the CPU cannot
+possibly be idle. Otherwise, ``rcu_exp_handler()`` invokes
+``rcu_report_exp_rdp()`` to report the corresponding quiescent state,
+regardless of whether or not that quiescent state was due to the CPU
+being idle.
+
+In summary, RCU expedited grace periods check for idle when building the
+bitmask of CPUs that must be IPIed, just before sending each IPI, and
+(either explicitly or implicitly) within the IPI handler.
+
+Batching via Sequence Counter
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+If each grace-period request was carried out separately, expedited grace
+periods would have abysmal scalability and problematic high-load
+characteristics. Because each grace-period operation can serve an
+unlimited number of updates, it is important to *batch* requests, so
+that a single expedited grace-period operation will cover all requests
+in the corresponding batch.
+
+This batching is controlled by a sequence counter named
+``->expedited_sequence`` in the ``rcu_state`` structure. This counter
+has an odd value when there is an expedited grace period in progress and
+an even value otherwise, so that dividing the counter value by two gives
+the number of completed grace periods. During any given update request,
+the counter must transition from even to odd and then back to even, thus
+indicating that a grace period has elapsed. Therefore, if the initial
+value of the counter is ``s``, the updater must wait until the counter
+reaches at least the value ``(s+3)&~0x1``. This counter is managed by
+the following access functions:
+
+#. ``rcu_exp_gp_seq_start()``, which marks the start of an expedited
+   grace period.
+#. ``rcu_exp_gp_seq_end()``, which marks the end of an expedited grace
+   period.
+#. ``rcu_exp_gp_seq_snap()``, which obtains a snapshot of the counter.
+#. ``rcu_exp_gp_seq_done()``, which returns ``true`` if a full expedited
+   grace period has elapsed since the corresponding call to
+   ``rcu_exp_gp_seq_snap()``.
+
+Again, only one request in a given batch need actually carry out a
+grace-period operation, which means there must be an efficient way to
+identify which of many concurrent reqeusts will initiate the grace
+period, and that there be an efficient way for the remaining requests to
+wait for that grace period to complete. However, that is the topic of
+the next section.
+
+Funnel Locking and Wait/Wakeup
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The natural way to sort out which of a batch of updaters will initiate
+the expedited grace period is to use the ``rcu_node`` combining tree, as
+implemented by the ``exp_funnel_lock()`` function. The first updater
+corresponding to a given grace period arriving at a given ``rcu_node``
+structure records its desired grace-period sequence number in the
+``->exp_seq_rq`` field and moves up to the next level in the tree.
+Otherwise, if the ``->exp_seq_rq`` field already contains the sequence
+number for the desired grace period or some later one, the updater
+blocks on one of four wait queues in the ``->exp_wq[]`` array, using the
+second-from-bottom and third-from bottom bits as an index. An
+``->exp_lock`` field in the ``rcu_node`` structure synchronizes access
+to these fields.
+
+An empty ``rcu_node`` tree is shown in the following diagram, with the
+white cells representing the ``->exp_seq_rq`` field and the red cells
+representing the elements of the ``->exp_wq[]`` array.
+
+.. kernel-figure:: Funnel0.svg
+
+The next diagram shows the situation after the arrival of Task A and
+Task B at the leftmost and rightmost leaf ``rcu_node`` structures,
+respectively. The current value of the ``rcu_state`` structure's
+``->expedited_sequence`` field is zero, so adding three and clearing the
+bottom bit results in the value two, which both tasks record in the
+``->exp_seq_rq`` field of their respective ``rcu_node`` structures:
+
+.. kernel-figure:: Funnel1.svg
+
+Each of Tasks A and B will move up to the root ``rcu_node`` structure.
+Suppose that Task A wins, recording its desired grace-period sequence
+number and resulting in the state shown below:
+
+.. kernel-figure:: Funnel2.svg
+
+Task A now advances to initiate a new grace period, while Task B moves
+up to the root ``rcu_node`` structure, and, seeing that its desired
+sequence number is already recorded, blocks on ``->exp_wq[1]``.
+
++-----------------------------------------------------------------------+
+| **Quick Quiz**:                                                       |
++-----------------------------------------------------------------------+
+| Why ``->exp_wq[1]``? Given that the value of these tasks' desired     |
+| sequence number is two, so shouldn't they instead block on            |
+| ``->exp_wq[2]``?                                                      |
++-----------------------------------------------------------------------+
+| **Answer**:                                                           |
++-----------------------------------------------------------------------+
+| No.                                                                   |
+| Recall that the bottom bit of the desired sequence number indicates   |
+| whether or not a grace period is currently in progress. It is         |
+| therefore necessary to shift the sequence number right one bit        |
+| position to obtain the number of the grace period. This results in    |
+| ``->exp_wq[1]``.                                                      |
++-----------------------------------------------------------------------+
+
+If Tasks C and D also arrive at this point, they will compute the same
+desired grace-period sequence number, and see that both leaf
+``rcu_node`` structures already have that value recorded. They will
+therefore block on their respective ``rcu_node`` structures'
+``->exp_wq[1]`` fields, as shown below:
+
+.. kernel-figure:: Funnel3.svg
+
+Task A now acquires the ``rcu_state`` structure's ``->exp_mutex`` and
+initiates the grace period, which increments ``->expedited_sequence``.
+Therefore, if Tasks E and F arrive, they will compute a desired sequence
+number of 4 and will record this value as shown below:
+
+.. kernel-figure:: Funnel4.svg
+
+Tasks E and F will propagate up the ``rcu_node`` combining tree, with
+Task F blocking on the root ``rcu_node`` structure and Task E wait for
+Task A to finish so that it can start the next grace period. The
+resulting state is as shown below:
+
+.. kernel-figure:: Funnel5.svg
+
+Once the grace period completes, Task A starts waking up the tasks
+waiting for this grace period to complete, increments the
+``->expedited_sequence``, acquires the ``->exp_wake_mutex`` and then
+releases the ``->exp_mutex``. This results in the following state:
+
+.. kernel-figure:: Funnel6.svg
+
+Task E can then acquire ``->exp_mutex`` and increment
+``->expedited_sequence`` to the value three. If new tasks G and H arrive
+and moves up the combining tree at the same time, the state will be as
+follows:
+
+.. kernel-figure:: Funnel7.svg
+
+Note that three of the root ``rcu_node`` structure's waitqueues are now
+occupied. However, at some point, Task A will wake up the tasks blocked
+on the ``->exp_wq`` waitqueues, resulting in the following state:
+
+.. kernel-figure:: Funnel8.svg
+
+Execution will continue with Tasks E and H completing their grace
+periods and carrying out their wakeups.
+
++-----------------------------------------------------------------------+
+| **Quick Quiz**:                                                       |
++-----------------------------------------------------------------------+
+| What happens if Task A takes so long to do its wakeups that Task E's  |
+| grace period completes?                                               |
++-----------------------------------------------------------------------+
+| **Answer**:                                                           |
++-----------------------------------------------------------------------+
+| Then Task E will block on the ``->exp_wake_mutex``, which will also   |
+| prevent it from releasing ``->exp_mutex``, which in turn will prevent |
+| the next grace period from starting. This last is important in        |
+| preventing overflow of the ``->exp_wq[]`` array.                      |
++-----------------------------------------------------------------------+
+
+Use of Workqueues
+~~~~~~~~~~~~~~~~~
+
+In earlier implementations, the task requesting the expedited grace
+period also drove it to completion. This straightforward approach had
+the disadvantage of needing to account for POSIX signals sent to user
+tasks, so more recent implemementations use the Linux kernel's
+`workqueues <https://www.kernel.org/doc/Documentation/core-api/workqueue.rst>`__.
+
+The requesting task still does counter snapshotting and funnel-lock
+processing, but the task reaching the top of the funnel lock does a
+``schedule_work()`` (from ``_synchronize_rcu_expedited()`` so that a
+workqueue kthread does the actual grace-period processing. Because
+workqueue kthreads do not accept POSIX signals, grace-period-wait
+processing need not allow for POSIX signals. In addition, this approach
+allows wakeups for the previous expedited grace period to be overlapped
+with processing for the next expedited grace period. Because there are
+only four sets of waitqueues, it is necessary to ensure that the
+previous grace period's wakeups complete before the next grace period's
+wakeups start. This is handled by having the ``->exp_mutex`` guard
+expedited grace-period processing and the ``->exp_wake_mutex`` guard
+wakeups. The key point is that the ``->exp_mutex`` is not released until
+the first wakeup is complete, which means that the ``->exp_wake_mutex``
+has already been acquired at that point. This approach ensures that the
+previous grace period's wakeups can be carried out while the current
+grace period is in process, but that these wakeups will complete before
+the next grace period starts. This means that only three waitqueues are
+required, guaranteeing that the four that are provided are sufficient.
+
+Stall Warnings
+~~~~~~~~~~~~~~
+
+Expediting grace periods does nothing to speed things up when RCU
+readers take too long, and therefore expedited grace periods check for
+stalls just as normal grace periods do.
+
++-----------------------------------------------------------------------+
+| **Quick Quiz**:                                                       |
++-----------------------------------------------------------------------+
+| But why not just let the normal grace-period machinery detect the     |
+| stalls, given that a given reader must block both normal and          |
+| expedited grace periods?                                              |
++-----------------------------------------------------------------------+
+| **Answer**:                                                           |
++-----------------------------------------------------------------------+
+| Because it is quite possible that at a given time there is no normal  |
+| grace period in progress, in which case the normal grace period       |
+| cannot emit a stall warning.                                          |
++-----------------------------------------------------------------------+
+
+The ``synchronize_sched_expedited_wait()`` function loops waiting for
+the expedited grace period to end, but with a timeout set to the current
+RCU CPU stall-warning time. If this time is exceeded, any CPUs or
+``rcu_node`` structures blocking the current grace period are printed.
+Each stall warning results in another pass through the loop, but the
+second and subsequent passes use longer stall times.
+
+Mid-boot operation
+~~~~~~~~~~~~~~~~~~
+
+The use of workqueues has the advantage that the expedited grace-period
+code need not worry about POSIX signals. Unfortunately, it has the
+corresponding disadvantage that workqueues cannot be used until they are
+initialized, which does not happen until some time after the scheduler
+spawns the first task. Given that there are parts of the kernel that
+really do want to execute grace periods during this mid-boot “dead
+zone”, expedited grace periods must do something else during thie time.
+
+What they do is to fall back to the old practice of requiring that the
+requesting task drive the expedited grace period, as was the case before
+the use of workqueues. However, the requesting task is only required to
+drive the grace period during the mid-boot dead zone. Before mid-boot, a
+synchronous grace period is a no-op. Some time after mid-boot,
+workqueues are used.
+
+Non-expedited non-SRCU synchronous grace periods must also operate
+normally during mid-boot. This is handled by causing non-expedited grace
+periods to take the expedited code path during mid-boot.
+
+The current code assumes that there are no POSIX signals during the
+mid-boot dead zone. However, if an overwhelming need for POSIX signals
+somehow arises, appropriate adjustments can be made to the expedited
+stall-warning code. One such adjustment would reinstate the
+pre-workqueue stall-warning checks, but only during the mid-boot dead
+zone.
+
+With this refinement, synchronous grace periods can now be used from
+task context pretty much any time during the life of the kernel. That
+is, aside from some points in the suspend, hibernate, or shutdown code
+path.
+
+Summary
+~~~~~~~
+
+Expedited grace periods use a sequence-number approach to promote
+batching, so that a single grace-period operation can serve numerous
+requests. A funnel lock is used to efficiently identify the one task out
+of a concurrent group that will request the grace period. All members of
+the group will block on waitqueues provided in the ``rcu_node``
+structure. The actual grace-period processing is carried out by a
+workqueue.
+
+CPU-hotplug operations are noted lazily in order to prevent the need for
+tight synchronization between expedited grace periods and CPU-hotplug
+operations. The dyntick-idle counters are used to avoid sending IPIs to
+idle CPUs, at least in the common case. RCU-preempt and RCU-sched use
+different IPI handlers and different code to respond to the state
+changes carried out by those handlers, but otherwise use common code.
+
+Quiescent states are tracked using the ``rcu_node`` tree, and once all
+necessary quiescent states have been reported, all tasks waiting on this
+expedited grace period are awakened. A pair of mutexes are used to allow
+one grace period's wakeups to proceed concurrently with the next grace
+period's processing.
+
+This combination of mechanisms allows expedited grace periods to run
+reasonably efficiently. However, for non-time-critical tasks, normal
+grace periods should be used instead because their longer duration
+permits much higher degrees of batching, and thus much lower per-request
+overheads.
diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel0.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel0.svg
new file mode 100644
index 000000000..98af66557
--- /dev/null
+++ b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel0.svg
@@ -0,0 +1,275 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="490.05093"
+   height="125.78741"
+   id="svg2"
+   version="1.1"
+   inkscape:version="0.48.4 r9939"
+   sodipodi:docname="Funnel0.svg">
+  <defs
+     id="defs4">
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend"
+       style="overflow:visible">
+      <path
+         id="path3792"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lstart"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lstart"
+       style="overflow:visible">
+      <path
+         id="path3789"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(1.1,0,0,1.1,1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lstart"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lstart-4"
+       style="overflow:visible">
+      <path
+         id="path3789-9"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(1.1,0,0,1.1,1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-4"
+       style="overflow:visible">
+      <path
+         id="path3792-4"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+  </defs>
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="1.3670394"
+     inkscape:cx="201.06495"
+     inkscape:cy="-86.548414"
+     inkscape:document-units="px"
+     inkscape:current-layer="layer1"
+     showgrid="false"
+     inkscape:window-width="1351"
+     inkscape:window-height="836"
+     inkscape:window-x="171"
+     inkscape:window-y="279"
+     inkscape:window-maximized="0"
+     fit-margin-top="5"
+     fit-margin-left="5"
+     fit-margin-right="5"
+     fit-margin-bottom="5" />
+  <metadata
+     id="metadata7">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(-117.08462,-249.92053)">
+    <flowRoot
+       xml:space="preserve"
+       id="flowRoot2985"
+       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"><flowRegion
+         id="flowRegion2987"><rect
+           id="rect2989"
+           width="82.85714"
+           height="11.428572"
+           x="240"
+           y="492.36218" /></flowRegion><flowPara
+         id="flowPara2991" /></flowRoot>    <text
+       xml:space="preserve"
+       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
+       x="362.371"
+       y="262.51819"
+       id="text4441"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan4443"
+         x="362.371"
+         y="262.51819">-&gt;expedited_sequence: 0</tspan></text>
+    <rect
+       style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+       id="rect3101"
+       width="43.158947"
+       height="26.33428"
+       x="253.55223"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3"
+       width="43.158947"
+       height="26.33428"
+       x="297.04141"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3-6"
+       width="43.158947"
+       height="26.33428"
+       x="427.509"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3-6-7"
+       width="43.158947"
+       height="26.33428"
+       x="384.01981"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3-6-7-5"
+       width="43.158947"
+       height="26.33428"
+       x="340.53061"
+       y="275.07489" />
+    <g
+       id="g3997"
+       transform="translate(-0.87295532,0)">
+      <rect
+         y="343.37366"
+         x="123.95757"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-35"
+         style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="167.44673"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-62"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="297.91437"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-9"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="254.42516"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-1"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="210.93593"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-5-2"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <text
+         xml:space="preserve"
+         style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         x="145.45404"
+         y="360.25174"
+         id="text3013"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan3015"
+           x="145.45404"
+           y="360.25174"
+           style="font-size:10px">:0</tspan></text>
+    </g>
+    <g
+       id="g3997-7"
+       transform="translate(260.06223,0)">
+      <rect
+         y="343.37366"
+         x="123.95757"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-35-0"
+         style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="167.44673"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-62-9"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="297.91437"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-9-3"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="254.42516"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-1-6"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="210.93593"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-5-2-0"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <text
+         xml:space="preserve"
+         style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         x="145.45404"
+         y="360.25174"
+         id="text3013-3"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan3015-6"
+           x="145.45404"
+           y="360.25174"
+           style="font-size:10px">:0</tspan></text>
+    </g>
+  </g>
+</svg>
diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel1.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel1.svg
new file mode 100644
index 000000000..e0184a37a
--- /dev/null
+++ b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel1.svg
@@ -0,0 +1,275 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="490.05093"
+   height="125.78741"
+   id="svg2"
+   version="1.1"
+   inkscape:version="0.48.4 r9939"
+   sodipodi:docname="Funnel1.svg">
+  <defs
+     id="defs4">
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend"
+       style="overflow:visible">
+      <path
+         id="path3792"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lstart"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lstart"
+       style="overflow:visible">
+      <path
+         id="path3789"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(1.1,0,0,1.1,1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lstart"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lstart-4"
+       style="overflow:visible">
+      <path
+         id="path3789-9"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(1.1,0,0,1.1,1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-4"
+       style="overflow:visible">
+      <path
+         id="path3792-4"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+  </defs>
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="1.3670394"
+     inkscape:cx="201.06495"
+     inkscape:cy="-86.548414"
+     inkscape:document-units="px"
+     inkscape:current-layer="g3997-7"
+     showgrid="false"
+     inkscape:window-width="1351"
+     inkscape:window-height="836"
+     inkscape:window-x="363"
+     inkscape:window-y="336"
+     inkscape:window-maximized="0"
+     fit-margin-top="5"
+     fit-margin-left="5"
+     fit-margin-right="5"
+     fit-margin-bottom="5" />
+  <metadata
+     id="metadata7">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(-117.08462,-249.92053)">
+    <flowRoot
+       xml:space="preserve"
+       id="flowRoot2985"
+       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"><flowRegion
+         id="flowRegion2987"><rect
+           id="rect2989"
+           width="82.85714"
+           height="11.428572"
+           x="240"
+           y="492.36218" /></flowRegion><flowPara
+         id="flowPara2991" /></flowRoot>    <text
+       xml:space="preserve"
+       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
+       x="362.371"
+       y="262.51819"
+       id="text4441"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan4443"
+         x="362.371"
+         y="262.51819">-&gt;expedited_sequence: 0</tspan></text>
+    <rect
+       style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+       id="rect3101"
+       width="43.158947"
+       height="26.33428"
+       x="253.55223"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3"
+       width="43.158947"
+       height="26.33428"
+       x="297.04141"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3-6"
+       width="43.158947"
+       height="26.33428"
+       x="427.509"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3-6-7"
+       width="43.158947"
+       height="26.33428"
+       x="384.01981"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3-6-7-5"
+       width="43.158947"
+       height="26.33428"
+       x="340.53061"
+       y="275.07489" />
+    <g
+       id="g3997"
+       transform="translate(-0.87295532,0)">
+      <rect
+         y="343.37366"
+         x="123.95757"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-35"
+         style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="167.44673"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-62"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="297.91437"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-9"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="254.42516"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-1"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="210.93593"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-5-2"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <text
+         xml:space="preserve"
+         style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         x="146.00092"
+         y="360.25174"
+         id="text3013"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan3015"
+           x="146.00092"
+           y="360.25174"
+           style="font-size:10px">A:2</tspan></text>
+    </g>
+    <g
+       id="g3997-7"
+       transform="translate(260.06223,0)">
+      <rect
+         y="343.37366"
+         x="123.95757"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-35-0"
+         style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="167.44673"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-62-9"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="297.91437"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-9-3"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="254.42516"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-1-6"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="210.93593"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-5-2-0"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <text
+         xml:space="preserve"
+         style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         x="145.54926"
+         y="360.25174"
+         id="text3013-3"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan3015-6"
+           x="145.54926"
+           y="360.25174"
+           style="font-size:10px">B:2</tspan></text>
+    </g>
+  </g>
+</svg>
diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel2.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel2.svg
new file mode 100644
index 000000000..1bc3fed54
--- /dev/null
+++ b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel2.svg
@@ -0,0 +1,287 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="490.05093"
+   height="125.78741"
+   id="svg2"
+   version="1.1"
+   inkscape:version="0.48.4 r9939"
+   sodipodi:docname="Funnel2.svg">
+  <defs
+     id="defs4">
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend"
+       style="overflow:visible">
+      <path
+         id="path3792"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lstart"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lstart"
+       style="overflow:visible">
+      <path
+         id="path3789"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(1.1,0,0,1.1,1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lstart"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lstart-4"
+       style="overflow:visible">
+      <path
+         id="path3789-9"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(1.1,0,0,1.1,1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-4"
+       style="overflow:visible">
+      <path
+         id="path3792-4"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+  </defs>
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="1.3670394"
+     inkscape:cx="114.01552"
+     inkscape:cy="-86.548414"
+     inkscape:document-units="px"
+     inkscape:current-layer="g3997-7"
+     showgrid="false"
+     inkscape:window-width="1351"
+     inkscape:window-height="836"
+     inkscape:window-x="363"
+     inkscape:window-y="336"
+     inkscape:window-maximized="0"
+     fit-margin-top="5"
+     fit-margin-left="5"
+     fit-margin-right="5"
+     fit-margin-bottom="5" />
+  <metadata
+     id="metadata7">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(-117.08462,-249.92053)">
+    <flowRoot
+       xml:space="preserve"
+       id="flowRoot2985"
+       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"><flowRegion
+         id="flowRegion2987"><rect
+           id="rect2989"
+           width="82.85714"
+           height="11.428572"
+           x="240"
+           y="492.36218" /></flowRegion><flowPara
+         id="flowPara2991" /></flowRoot>    <text
+       xml:space="preserve"
+       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
+       x="362.371"
+       y="262.51819"
+       id="text4441"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan4443"
+         x="362.371"
+         y="262.51819">-&gt;expedited_sequence: 0</tspan></text>
+    <rect
+       style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+       id="rect3101"
+       width="43.158947"
+       height="26.33428"
+       x="253.55223"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3"
+       width="43.158947"
+       height="26.33428"
+       x="297.04141"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3-6"
+       width="43.158947"
+       height="26.33428"
+       x="427.509"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3-6-7"
+       width="43.158947"
+       height="26.33428"
+       x="384.01981"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3-6-7-5"
+       width="43.158947"
+       height="26.33428"
+       x="340.53061"
+       y="275.07489" />
+    <g
+       id="g3997"
+       transform="translate(-0.87295532,0)">
+      <rect
+         y="343.37366"
+         x="123.95757"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-35"
+         style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="167.44673"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-62"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="297.91437"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-9"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="254.42516"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-1"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="210.93593"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-5-2"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <text
+         xml:space="preserve"
+         style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         x="146.00092"
+         y="360.25174"
+         id="text3013"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan3015"
+           x="146.00092"
+           y="360.25174"
+           style="font-size:10px">:2</tspan></text>
+    </g>
+    <g
+       id="g3997-7"
+       transform="translate(260.06223,0)">
+      <rect
+         y="343.37366"
+         x="123.95757"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-35-0"
+         style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="167.44673"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-62-9"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="297.91437"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-9-3"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="254.42516"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-1-6"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="210.93593"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-5-2-0"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <text
+         xml:space="preserve"
+         style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         x="145.54926"
+         y="360.25174"
+         id="text3013-3"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan3015-6"
+           x="145.54926"
+           y="360.25174"
+           style="font-size:10px">B:2</tspan></text>
+    </g>
+    <text
+       xml:space="preserve"
+       style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+       x="275.59558"
+       y="291.95297"
+       id="text3013-36"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan3015-7"
+         x="275.59558"
+         y="291.95297"
+         style="font-size:10px">A:2</tspan></text>
+  </g>
+</svg>
diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel3.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel3.svg
new file mode 100644
index 000000000..6d8a1bffb
--- /dev/null
+++ b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel3.svg
@@ -0,0 +1,323 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="490.05093"
+   height="125.78741"
+   id="svg2"
+   version="1.1"
+   inkscape:version="0.48.4 r9939"
+   sodipodi:docname="Funnel3.svg">
+  <defs
+     id="defs4">
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend"
+       style="overflow:visible">
+      <path
+         id="path3792"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lstart"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lstart"
+       style="overflow:visible">
+      <path
+         id="path3789"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(1.1,0,0,1.1,1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lstart"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lstart-4"
+       style="overflow:visible">
+      <path
+         id="path3789-9"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(1.1,0,0,1.1,1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-4"
+       style="overflow:visible">
+      <path
+         id="path3792-4"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+  </defs>
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="1.3670394"
+     inkscape:cx="114.01552"
+     inkscape:cy="-86.548414"
+     inkscape:document-units="px"
+     inkscape:current-layer="layer1"
+     showgrid="false"
+     inkscape:window-width="1351"
+     inkscape:window-height="836"
+     inkscape:window-x="68"
+     inkscape:window-y="180"
+     inkscape:window-maximized="0"
+     fit-margin-top="5"
+     fit-margin-left="5"
+     fit-margin-right="5"
+     fit-margin-bottom="5" />
+  <metadata
+     id="metadata7">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(-117.08462,-249.92053)">
+    <flowRoot
+       xml:space="preserve"
+       id="flowRoot2985"
+       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"><flowRegion
+         id="flowRegion2987"><rect
+           id="rect2989"
+           width="82.85714"
+           height="11.428572"
+           x="240"
+           y="492.36218" /></flowRegion><flowPara
+         id="flowPara2991" /></flowRoot>    <text
+       xml:space="preserve"
+       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
+       x="362.371"
+       y="262.51819"
+       id="text4441"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan4443"
+         x="362.371"
+         y="262.51819">-&gt;expedited_sequence: 0  GP: A</tspan></text>
+    <rect
+       style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+       id="rect3101"
+       width="43.158947"
+       height="26.33428"
+       x="253.55223"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3"
+       width="43.158947"
+       height="26.33428"
+       x="297.04141"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3-6"
+       width="43.158947"
+       height="26.33428"
+       x="427.509"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3-6-7"
+       width="43.158947"
+       height="26.33428"
+       x="384.01981"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3-6-7-5"
+       width="43.158947"
+       height="26.33428"
+       x="340.53061"
+       y="275.07489" />
+    <g
+       id="g3997"
+       transform="translate(-0.87295532,0)">
+      <rect
+         y="343.37366"
+         x="123.95757"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-35"
+         style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="167.44673"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-62"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="297.91437"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-9"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="254.42516"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-1"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="210.93593"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-5-2"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <text
+         xml:space="preserve"
+         style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         x="146.00092"
+         y="360.25174"
+         id="text3013"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan3015"
+           x="146.00092"
+           y="360.25174"
+           style="font-size:10px">:2</tspan></text>
+      <text
+         xml:space="preserve"
+         style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         x="232.51051"
+         y="360.18094"
+         id="text3013-3-3"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan3015-6-6"
+           x="232.51051"
+           y="360.18094"
+           style="font-size:10px">C</tspan></text>
+    </g>
+    <g
+       id="g3019"
+       transform="translate(260.06223,0)">
+      <rect
+         y="343.37366"
+         x="123.95757"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-35-0"
+         style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="167.44673"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-62-9"
+         style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="297.91437"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-9-3"
+         style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="254.42516"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-1-6"
+         style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="210.93593"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-5-2-0"
+         style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <text
+         xml:space="preserve"
+         style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         x="145.54926"
+         y="360.25174"
+         id="text3013-3"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan3015-6"
+           x="145.54926"
+           y="360.25174"
+           style="font-size:10px">:2</tspan></text>
+      <text
+         xml:space="preserve"
+         style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         x="232.31764"
+         y="360.18582"
+         id="text3013-3-3-7"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan3015-6-6-5"
+           x="232.31764"
+           y="360.18582"
+           style="font-size:10px">D</tspan></text>
+    </g>
+    <text
+       xml:space="preserve"
+       style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+       x="275.59558"
+       y="291.95297"
+       id="text3013-36"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan3015-7"
+         x="275.59558"
+         y="291.95297"
+         style="font-size:10px">:2</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+       x="361.97092"
+       y="291.88705"
+       id="text3013-3-36"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan3015-6-7"
+         x="361.97092"
+         y="291.88705"
+         style="font-size:10px">B</tspan></text>
+  </g>
+</svg>
diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel4.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel4.svg
new file mode 100644
index 000000000..44018fd63
--- /dev/null
+++ b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel4.svg
@@ -0,0 +1,323 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="490.05093"
+   height="125.78741"
+   id="svg2"
+   version="1.1"
+   inkscape:version="0.48.4 r9939"
+   sodipodi:docname="Funnel4.svg">
+  <defs
+     id="defs4">
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend"
+       style="overflow:visible">
+      <path
+         id="path3792"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lstart"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lstart"
+       style="overflow:visible">
+      <path
+         id="path3789"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(1.1,0,0,1.1,1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lstart"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lstart-4"
+       style="overflow:visible">
+      <path
+         id="path3789-9"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(1.1,0,0,1.1,1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-4"
+       style="overflow:visible">
+      <path
+         id="path3792-4"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+  </defs>
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="1.3670394"
+     inkscape:cx="114.01552"
+     inkscape:cy="-86.548414"
+     inkscape:document-units="px"
+     inkscape:current-layer="layer1"
+     showgrid="false"
+     inkscape:window-width="1351"
+     inkscape:window-height="836"
+     inkscape:window-x="68"
+     inkscape:window-y="180"
+     inkscape:window-maximized="0"
+     fit-margin-top="5"
+     fit-margin-left="5"
+     fit-margin-right="5"
+     fit-margin-bottom="5" />
+  <metadata
+     id="metadata7">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(-117.08462,-249.92053)">
+    <flowRoot
+       xml:space="preserve"
+       id="flowRoot2985"
+       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"><flowRegion
+         id="flowRegion2987"><rect
+           id="rect2989"
+           width="82.85714"
+           height="11.428572"
+           x="240"
+           y="492.36218" /></flowRegion><flowPara
+         id="flowPara2991" /></flowRoot>    <text
+       xml:space="preserve"
+       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
+       x="362.371"
+       y="262.51819"
+       id="text4441"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan4443"
+         x="362.371"
+         y="262.51819">-&gt;expedited_sequence: 1  GP: A</tspan></text>
+    <rect
+       style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+       id="rect3101"
+       width="43.158947"
+       height="26.33428"
+       x="253.55223"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3"
+       width="43.158947"
+       height="26.33428"
+       x="297.04141"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3-6"
+       width="43.158947"
+       height="26.33428"
+       x="427.509"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3-6-7"
+       width="43.158947"
+       height="26.33428"
+       x="384.01981"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3-6-7-5"
+       width="43.158947"
+       height="26.33428"
+       x="340.53061"
+       y="275.07489" />
+    <g
+       id="g3997"
+       transform="translate(-0.87295532,0)">
+      <rect
+         y="343.37366"
+         x="123.95757"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-35"
+         style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="167.44673"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-62"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="297.91437"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-9"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="254.42516"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-1"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="210.93593"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-5-2"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <text
+         xml:space="preserve"
+         style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         x="146.00092"
+         y="360.25174"
+         id="text3013"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan3015"
+           x="146.00092"
+           y="360.25174"
+           style="font-size:10px">E:4</tspan></text>
+      <text
+         xml:space="preserve"
+         style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         x="232.51051"
+         y="360.18094"
+         id="text3013-3-3"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan3015-6-6"
+           x="232.51051"
+           y="360.18094"
+           style="font-size:10px">C</tspan></text>
+    </g>
+    <g
+       id="g3019"
+       transform="translate(260.06223,0)">
+      <rect
+         y="343.37366"
+         x="123.95757"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-35-0"
+         style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="167.44673"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-62-9"
+         style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="297.91437"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-9-3"
+         style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="254.42516"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-1-6"
+         style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="210.93593"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-5-2-0"
+         style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <text
+         xml:space="preserve"
+         style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         x="145.54926"
+         y="360.25174"
+         id="text3013-3"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan3015-6"
+           x="145.54926"
+           y="360.25174"
+           style="font-size:10px">F:4</tspan></text>
+      <text
+         xml:space="preserve"
+         style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         x="232.31764"
+         y="360.18582"
+         id="text3013-3-3-7"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan3015-6-6-5"
+           x="232.31764"
+           y="360.18582"
+           style="font-size:10px">D</tspan></text>
+    </g>
+    <text
+       xml:space="preserve"
+       style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+       x="275.59558"
+       y="291.95297"
+       id="text3013-36"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan3015-7"
+         x="275.59558"
+         y="291.95297"
+         style="font-size:10px">:2</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+       x="361.97092"
+       y="291.88705"
+       id="text3013-3-36"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan3015-6-7"
+         x="361.97092"
+         y="291.88705"
+         style="font-size:10px">B</tspan></text>
+  </g>
+</svg>
diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel5.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel5.svg
new file mode 100644
index 000000000..e5eef5045
--- /dev/null
+++ b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel5.svg
@@ -0,0 +1,335 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="490.05093"
+   height="125.78741"
+   id="svg2"
+   version="1.1"
+   inkscape:version="0.48.4 r9939"
+   sodipodi:docname="Funnel5.svg">
+  <defs
+     id="defs4">
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend"
+       style="overflow:visible">
+      <path
+         id="path3792"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lstart"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lstart"
+       style="overflow:visible">
+      <path
+         id="path3789"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(1.1,0,0,1.1,1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lstart"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lstart-4"
+       style="overflow:visible">
+      <path
+         id="path3789-9"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(1.1,0,0,1.1,1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-4"
+       style="overflow:visible">
+      <path
+         id="path3792-4"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+  </defs>
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="1.3670394"
+     inkscape:cx="114.01552"
+     inkscape:cy="-86.548414"
+     inkscape:document-units="px"
+     inkscape:current-layer="layer1"
+     showgrid="false"
+     inkscape:window-width="1351"
+     inkscape:window-height="836"
+     inkscape:window-x="68"
+     inkscape:window-y="180"
+     inkscape:window-maximized="0"
+     fit-margin-top="5"
+     fit-margin-left="5"
+     fit-margin-right="5"
+     fit-margin-bottom="5" />
+  <metadata
+     id="metadata7">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(-117.08462,-249.92053)">
+    <flowRoot
+       xml:space="preserve"
+       id="flowRoot2985"
+       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"><flowRegion
+         id="flowRegion2987"><rect
+           id="rect2989"
+           width="82.85714"
+           height="11.428572"
+           x="240"
+           y="492.36218" /></flowRegion><flowPara
+         id="flowPara2991" /></flowRoot>    <text
+       xml:space="preserve"
+       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
+       x="362.371"
+       y="262.51819"
+       id="text4441"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan4443"
+         x="362.371"
+         y="262.51819">-&gt;expedited_sequence: 1  GP: A,E</tspan></text>
+    <rect
+       style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+       id="rect3101"
+       width="43.158947"
+       height="26.33428"
+       x="253.55223"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3"
+       width="43.158947"
+       height="26.33428"
+       x="297.04141"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3-6"
+       width="43.158947"
+       height="26.33428"
+       x="427.509"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3-6-7"
+       width="43.158947"
+       height="26.33428"
+       x="384.01981"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3-6-7-5"
+       width="43.158947"
+       height="26.33428"
+       x="340.53061"
+       y="275.07489" />
+    <g
+       id="g3997"
+       transform="translate(-0.87295532,0)">
+      <rect
+         y="343.37366"
+         x="123.95757"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-35"
+         style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="167.44673"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-62"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="297.91437"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-9"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="254.42516"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-1"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="210.93593"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-5-2"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <text
+         xml:space="preserve"
+         style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         x="146.00092"
+         y="360.25174"
+         id="text3013"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan3015"
+           x="146.00092"
+           y="360.25174"
+           style="font-size:10px">:4</tspan></text>
+      <text
+         xml:space="preserve"
+         style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         x="232.51051"
+         y="360.18094"
+         id="text3013-3-3"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan3015-6-6"
+           x="232.51051"
+           y="360.18094"
+           style="font-size:10px">C</tspan></text>
+    </g>
+    <g
+       id="g3019"
+       transform="translate(260.06223,0)">
+      <rect
+         y="343.37366"
+         x="123.95757"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-35-0"
+         style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="167.44673"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-62-9"
+         style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="297.91437"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-9-3"
+         style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="254.42516"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-1-6"
+         style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="210.93593"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-5-2-0"
+         style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <text
+         xml:space="preserve"
+         style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         x="145.54926"
+         y="360.25174"
+         id="text3013-3"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan3015-6"
+           x="145.54926"
+           y="360.25174"
+           style="font-size:10px">:4</tspan></text>
+      <text
+         xml:space="preserve"
+         style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         x="232.31764"
+         y="360.18582"
+         id="text3013-3-3-7"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan3015-6-6-5"
+           x="232.31764"
+           y="360.18582"
+           style="font-size:10px">D</tspan></text>
+    </g>
+    <text
+       xml:space="preserve"
+       style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+       x="275.59558"
+       y="291.95297"
+       id="text3013-36"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan3015-7"
+         x="275.59558"
+         y="291.95297"
+         style="font-size:10px">:4</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+       x="361.97092"
+       y="291.88705"
+       id="text3013-3-36"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan3015-6-7"
+         x="361.97092"
+         y="291.88705"
+         style="font-size:10px">B</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+       x="405.40396"
+       y="291.88705"
+       id="text3013-3-36-3"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan3015-6-7-6"
+         x="405.40396"
+         y="291.88705"
+         style="font-size:10px">F</tspan></text>
+  </g>
+</svg>
diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel6.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel6.svg
new file mode 100644
index 000000000..fbd2c1892
--- /dev/null
+++ b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel6.svg
@@ -0,0 +1,335 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="490.05093"
+   height="125.78741"
+   id="svg2"
+   version="1.1"
+   inkscape:version="0.48.4 r9939"
+   sodipodi:docname="Funnel6.svg">
+  <defs
+     id="defs4">
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend"
+       style="overflow:visible">
+      <path
+         id="path3792"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lstart"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lstart"
+       style="overflow:visible">
+      <path
+         id="path3789"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(1.1,0,0,1.1,1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lstart"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lstart-4"
+       style="overflow:visible">
+      <path
+         id="path3789-9"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(1.1,0,0,1.1,1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-4"
+       style="overflow:visible">
+      <path
+         id="path3792-4"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+  </defs>
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="1.3670394"
+     inkscape:cx="114.01552"
+     inkscape:cy="-86.548414"
+     inkscape:document-units="px"
+     inkscape:current-layer="layer1"
+     showgrid="false"
+     inkscape:window-width="1351"
+     inkscape:window-height="836"
+     inkscape:window-x="68"
+     inkscape:window-y="180"
+     inkscape:window-maximized="0"
+     fit-margin-top="5"
+     fit-margin-left="5"
+     fit-margin-right="5"
+     fit-margin-bottom="5" />
+  <metadata
+     id="metadata7">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(-117.08462,-249.92053)">
+    <flowRoot
+       xml:space="preserve"
+       id="flowRoot2985"
+       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"><flowRegion
+         id="flowRegion2987"><rect
+           id="rect2989"
+           width="82.85714"
+           height="11.428572"
+           x="240"
+           y="492.36218" /></flowRegion><flowPara
+         id="flowPara2991" /></flowRoot>    <text
+       xml:space="preserve"
+       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
+       x="362.371"
+       y="262.51819"
+       id="text4441"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan4443"
+         x="362.371"
+         y="262.51819">-&gt;expedited_sequence: 2  GP: E  Wakeup: A</tspan></text>
+    <rect
+       style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+       id="rect3101"
+       width="43.158947"
+       height="26.33428"
+       x="253.55223"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3"
+       width="43.158947"
+       height="26.33428"
+       x="297.04141"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3-6"
+       width="43.158947"
+       height="26.33428"
+       x="427.509"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3-6-7"
+       width="43.158947"
+       height="26.33428"
+       x="384.01981"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3-6-7-5"
+       width="43.158947"
+       height="26.33428"
+       x="340.53061"
+       y="275.07489" />
+    <g
+       id="g3997"
+       transform="translate(-0.87295532,0)">
+      <rect
+         y="343.37366"
+         x="123.95757"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-35"
+         style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="167.44673"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-62"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="297.91437"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-9"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="254.42516"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-1"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="210.93593"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-5-2"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <text
+         xml:space="preserve"
+         style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         x="146.00092"
+         y="360.25174"
+         id="text3013"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan3015"
+           x="146.00092"
+           y="360.25174"
+           style="font-size:10px">:4</tspan></text>
+      <text
+         xml:space="preserve"
+         style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         x="232.51051"
+         y="360.18094"
+         id="text3013-3-3"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan3015-6-6"
+           x="232.51051"
+           y="360.18094"
+           style="font-size:10px">C</tspan></text>
+    </g>
+    <g
+       id="g3019"
+       transform="translate(260.06223,0)">
+      <rect
+         y="343.37366"
+         x="123.95757"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-35-0"
+         style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="167.44673"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-62-9"
+         style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="297.91437"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-9-3"
+         style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="254.42516"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-1-6"
+         style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="210.93593"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-5-2-0"
+         style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <text
+         xml:space="preserve"
+         style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         x="145.54926"
+         y="360.25174"
+         id="text3013-3"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan3015-6"
+           x="145.54926"
+           y="360.25174"
+           style="font-size:10px">:4</tspan></text>
+      <text
+         xml:space="preserve"
+         style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         x="232.31764"
+         y="360.18582"
+         id="text3013-3-3-7"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan3015-6-6-5"
+           x="232.31764"
+           y="360.18582"
+           style="font-size:10px">D</tspan></text>
+    </g>
+    <text
+       xml:space="preserve"
+       style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+       x="275.59558"
+       y="291.95297"
+       id="text3013-36"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan3015-7"
+         x="275.59558"
+         y="291.95297"
+         style="font-size:10px">:4</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+       x="361.97092"
+       y="291.88705"
+       id="text3013-3-36"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan3015-6-7"
+         x="361.97092"
+         y="291.88705"
+         style="font-size:10px">B</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+       x="405.40396"
+       y="291.88705"
+       id="text3013-3-36-3"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan3015-6-7-6"
+         x="405.40396"
+         y="291.88705"
+         style="font-size:10px">F</tspan></text>
+  </g>
+</svg>
diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel7.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel7.svg
new file mode 100644
index 000000000..502e159ed
--- /dev/null
+++ b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel7.svg
@@ -0,0 +1,347 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="490.05093"
+   height="125.78741"
+   id="svg2"
+   version="1.1"
+   inkscape:version="0.48.4 r9939"
+   sodipodi:docname="Funnel7.svg">
+  <defs
+     id="defs4">
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend"
+       style="overflow:visible">
+      <path
+         id="path3792"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lstart"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lstart"
+       style="overflow:visible">
+      <path
+         id="path3789"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(1.1,0,0,1.1,1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lstart"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lstart-4"
+       style="overflow:visible">
+      <path
+         id="path3789-9"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(1.1,0,0,1.1,1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-4"
+       style="overflow:visible">
+      <path
+         id="path3792-4"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+  </defs>
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="1.3670394"
+     inkscape:cx="114.01552"
+     inkscape:cy="-86.548414"
+     inkscape:document-units="px"
+     inkscape:current-layer="layer1"
+     showgrid="false"
+     inkscape:window-width="1351"
+     inkscape:window-height="836"
+     inkscape:window-x="68"
+     inkscape:window-y="180"
+     inkscape:window-maximized="0"
+     fit-margin-top="5"
+     fit-margin-left="5"
+     fit-margin-right="5"
+     fit-margin-bottom="5" />
+  <metadata
+     id="metadata7">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(-117.08462,-249.92053)">
+    <flowRoot
+       xml:space="preserve"
+       id="flowRoot2985"
+       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"><flowRegion
+         id="flowRegion2987"><rect
+           id="rect2989"
+           width="82.85714"
+           height="11.428572"
+           x="240"
+           y="492.36218" /></flowRegion><flowPara
+         id="flowPara2991" /></flowRoot>    <text
+       xml:space="preserve"
+       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
+       x="362.371"
+       y="262.51819"
+       id="text4441"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan4443"
+         x="362.371"
+         y="262.51819">-&gt;expedited_sequence: 3  GP: E,H  Wakeup: A</tspan></text>
+    <rect
+       style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+       id="rect3101"
+       width="43.158947"
+       height="26.33428"
+       x="253.55223"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3"
+       width="43.158947"
+       height="26.33428"
+       x="297.04141"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+       id="rect3101-3-6"
+       width="43.158947"
+       height="26.33428"
+       x="427.509"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3-6-7"
+       width="43.158947"
+       height="26.33428"
+       x="384.01981"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3-6-7-5"
+       width="43.158947"
+       height="26.33428"
+       x="340.53061"
+       y="275.07489" />
+    <g
+       id="g3997"
+       transform="translate(-0.87295532,0)">
+      <rect
+         y="343.37366"
+         x="123.95757"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-35"
+         style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="167.44673"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-62"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="297.91437"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-9"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="254.42516"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-1"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="210.93593"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-5-2"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <text
+         xml:space="preserve"
+         style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         x="146.00092"
+         y="360.25174"
+         id="text3013"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan3015"
+           x="146.00092"
+           y="360.25174"
+           style="font-size:10px">:4</tspan></text>
+      <text
+         xml:space="preserve"
+         style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         x="232.51051"
+         y="360.18094"
+         id="text3013-3-3"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan3015-6-6"
+           x="232.51051"
+           y="360.18094"
+           style="font-size:10px">C</tspan></text>
+    </g>
+    <g
+       id="g3019"
+       transform="translate(260.06223,0)">
+      <rect
+         y="343.37366"
+         x="123.95757"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-35-0"
+         style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="167.44673"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-62-9"
+         style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="297.91437"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-9-3"
+         style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="254.42516"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-1-6"
+         style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="210.93593"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-5-2-0"
+         style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <text
+         xml:space="preserve"
+         style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         x="145.54926"
+         y="360.25174"
+         id="text3013-3"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan3015-6"
+           x="145.54926"
+           y="360.25174"
+           style="font-size:10px">:6</tspan></text>
+      <text
+         xml:space="preserve"
+         style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         x="232.31764"
+         y="360.18582"
+         id="text3013-3-3-7"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan3015-6-6-5"
+           x="232.31764"
+           y="360.18582"
+           style="font-size:10px">D</tspan></text>
+    </g>
+    <text
+       xml:space="preserve"
+       style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+       x="275.59558"
+       y="291.95297"
+       id="text3013-36"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan3015-7"
+         x="275.59558"
+         y="291.95297"
+         style="font-size:10px">:6</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+       x="361.97092"
+       y="291.88705"
+       id="text3013-3-36"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan3015-6-7"
+         x="361.97092"
+         y="291.88705"
+         style="font-size:10px">B</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+       x="405.40396"
+       y="291.88705"
+       id="text3013-3-36-3"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan3015-6-7-6"
+         x="405.40396"
+         y="291.88705"
+         style="font-size:10px">F</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+       x="449.22031"
+       y="291.88217"
+       id="text3013-3-36-3-3"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan3015-6-7-6-6"
+         x="449.22031"
+         y="291.88217"
+         style="font-size:10px">G</tspan></text>
+  </g>
+</svg>
diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel8.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel8.svg
new file mode 100644
index 000000000..677401551
--- /dev/null
+++ b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel8.svg
@@ -0,0 +1,311 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="490.05093"
+   height="125.78741"
+   id="svg2"
+   version="1.1"
+   inkscape:version="0.48.4 r9939"
+   sodipodi:docname="Funnel8.svg">
+  <defs
+     id="defs4">
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend"
+       style="overflow:visible">
+      <path
+         id="path3792"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lstart"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lstart"
+       style="overflow:visible">
+      <path
+         id="path3789"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(1.1,0,0,1.1,1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lstart"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lstart-4"
+       style="overflow:visible">
+      <path
+         id="path3789-9"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(1.1,0,0,1.1,1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend-4"
+       style="overflow:visible">
+      <path
+         id="path3792-4"
+         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+  </defs>
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="1.3670394"
+     inkscape:cx="114.01552"
+     inkscape:cy="-86.548414"
+     inkscape:document-units="px"
+     inkscape:current-layer="layer1"
+     showgrid="false"
+     inkscape:window-width="1351"
+     inkscape:window-height="836"
+     inkscape:window-x="68"
+     inkscape:window-y="180"
+     inkscape:window-maximized="0"
+     fit-margin-top="5"
+     fit-margin-left="5"
+     fit-margin-right="5"
+     fit-margin-bottom="5" />
+  <metadata
+     id="metadata7">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(-117.08462,-249.92053)">
+    <flowRoot
+       xml:space="preserve"
+       id="flowRoot2985"
+       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"><flowRegion
+         id="flowRegion2987"><rect
+           id="rect2989"
+           width="82.85714"
+           height="11.428572"
+           x="240"
+           y="492.36218" /></flowRegion><flowPara
+         id="flowPara2991" /></flowRoot>    <text
+       xml:space="preserve"
+       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
+       x="362.371"
+       y="262.51819"
+       id="text4441"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan4443"
+         x="362.371"
+         y="262.51819">-&gt;expedited_sequence: 3  GP: E,H</tspan></text>
+    <rect
+       style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+       id="rect3101"
+       width="43.158947"
+       height="26.33428"
+       x="253.55223"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3"
+       width="43.158947"
+       height="26.33428"
+       x="297.04141"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+       id="rect3101-3-6"
+       width="43.158947"
+       height="26.33428"
+       x="427.509"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3-6-7"
+       width="43.158947"
+       height="26.33428"
+       x="384.01981"
+       y="275.07489" />
+    <rect
+       style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+       id="rect3101-3-6-7-5"
+       width="43.158947"
+       height="26.33428"
+       x="340.53061"
+       y="275.07489" />
+    <g
+       id="g3997"
+       transform="translate(-0.87295532,0)">
+      <rect
+         y="343.37366"
+         x="123.95757"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-35"
+         style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="167.44673"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-62"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="297.91437"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-9"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="254.42516"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-1"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <rect
+         y="343.37366"
+         x="210.93593"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-5-2"
+         style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+      <text
+         xml:space="preserve"
+         style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         x="146.00092"
+         y="360.25174"
+         id="text3013"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan3015"
+           x="146.00092"
+           y="360.25174"
+           style="font-size:10px">:4</tspan></text>
+    </g>
+    <g
+       id="g3019"
+       transform="translate(260.06223,0)">
+      <rect
+         y="343.37366"
+         x="123.95757"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-35-0"
+         style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="167.44673"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-62-9"
+         style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="297.91437"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-9-3"
+         style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="254.42516"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-1-6"
+         style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <rect
+         y="343.37366"
+         x="210.93593"
+         height="26.33428"
+         width="43.158947"
+         id="rect3101-3-6-7-5-2-0"
+         style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+      <text
+         xml:space="preserve"
+         style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+         x="145.54926"
+         y="360.25174"
+         id="text3013-3"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan3015-6"
+           x="145.54926"
+           y="360.25174"
+           style="font-size:10px">:6</tspan></text>
+    </g>
+    <text
+       xml:space="preserve"
+       style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+       x="275.59558"
+       y="291.95297"
+       id="text3013-36"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan3015-7"
+         x="275.59558"
+         y="291.95297"
+         style="font-size:10px">:6</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+       x="405.40396"
+       y="291.88705"
+       id="text3013-3-36-3"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan3015-6-7-6"
+         x="405.40396"
+         y="291.88705"
+         style="font-size:10px">F</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+       x="449.22031"
+       y="291.88217"
+       id="text3013-3-36-3-3"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan3015-6-7-6-6"
+         x="449.22031"
+         y="291.88217"
+         style="font-size:10px">G</tspan></text>
+  </g>
+</svg>