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-rw-r--r--Documentation/networking/ip-sysctl.rst41
1 files changed, 39 insertions, 2 deletions
diff --git a/Documentation/networking/ip-sysctl.rst b/Documentation/networking/ip-sysctl.rst
index a66054d076..7afff42612 100644
--- a/Documentation/networking/ip-sysctl.rst
+++ b/Documentation/networking/ip-sysctl.rst
@@ -745,6 +745,13 @@ tcp_comp_sack_nr - INTEGER
Default : 44
+tcp_backlog_ack_defer - BOOLEAN
+ If set, user thread processing socket backlog tries sending
+ one ACK for the whole queue. This helps to avoid potential
+ long latencies at end of a TCP socket syscall.
+
+ Default : true
+
tcp_slow_start_after_idle - BOOLEAN
If set, provide RFC2861 behavior and time out the congestion
window after an idle period. An idle period is defined at
@@ -1176,6 +1183,19 @@ tcp_plb_cong_thresh - INTEGER
Default: 128
+tcp_pingpong_thresh - INTEGER
+ The number of estimated data replies sent for estimated incoming data
+ requests that must happen before TCP considers that a connection is a
+ "ping-pong" (request-response) connection for which delayed
+ acknowledgments can provide benefits.
+
+ This threshold is 1 by default, but some applications may need a higher
+ threshold for optimal performance.
+
+ Possible Values: 1 - 255
+
+ Default: 1
+
UDP variables
=============
@@ -2304,6 +2324,17 @@ accept_ra_pinfo - BOOLEAN
- enabled if accept_ra is enabled.
- disabled if accept_ra is disabled.
+ra_honor_pio_life - BOOLEAN
+ Whether to use RFC4862 Section 5.5.3e to determine the valid
+ lifetime of an address matching a prefix sent in a Router
+ Advertisement Prefix Information Option.
+
+ - If enabled, the PIO valid lifetime will always be honored.
+ - If disabled, RFC4862 section 5.5.3e is used to determine
+ the valid lifetime of the address.
+
+ Default: 0 (disabled)
+
accept_ra_rt_info_min_plen - INTEGER
Minimum prefix length of Route Information in RA.
@@ -2471,12 +2502,18 @@ use_tempaddr - INTEGER
* -1 (for point-to-point devices and loopback devices)
temp_valid_lft - INTEGER
- valid lifetime (in seconds) for temporary addresses.
+ valid lifetime (in seconds) for temporary addresses. If less than the
+ minimum required lifetime (typically 5 seconds), temporary addresses
+ will not be created.
Default: 172800 (2 days)
temp_prefered_lft - INTEGER
- Preferred lifetime (in seconds) for temporary addresses.
+ Preferred lifetime (in seconds) for temporary addresses. If
+ temp_prefered_lft is less than the minimum required lifetime (typically
+ 5 seconds), temporary addresses will not be created. If
+ temp_prefered_lft is greater than temp_valid_lft, the preferred lifetime
+ is temp_valid_lft.
Default: 86400 (1 day)