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-rw-r--r--Documentation/networking/pktgen.rst12
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/networking/pktgen.rst b/Documentation/networking/pktgen.rst
index 1225f0f63f..c945218946 100644
--- a/Documentation/networking/pktgen.rst
+++ b/Documentation/networking/pktgen.rst
@@ -178,6 +178,7 @@ Examples::
IPSEC # IPsec encapsulation (needs CONFIG_XFRM)
NODE_ALLOC # node specific memory allocation
NO_TIMESTAMP # disable timestamping
+ SHARED # enable shared SKB
pgset 'flag ![name]' Clear a flag to determine behaviour.
Note that you might need to use single quote in
interactive mode, so that your shell wouldn't expand
@@ -288,6 +289,16 @@ To avoid breaking existing testbed scripts for using AH type and tunnel mode,
you can use "pgset spi SPI_VALUE" to specify which transformation mode
to employ.
+Disable shared SKB
+==================
+By default, SKBs sent by pktgen are shared (user count > 1).
+To test with non-shared SKBs, remove the "SHARED" flag by simply setting::
+
+ pg_set "flag !SHARED"
+
+However, if the "clone_skb" or "burst" parameters are configured, the skb
+still needs to be held by pktgen for further access. Hence the skb must be
+shared.
Current commands and configuration options
==========================================
@@ -357,6 +368,7 @@ Current commands and configuration options
IPSEC
NODE_ALLOC
NO_TIMESTAMP
+ SHARED
spi (ipsec)