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net: add doc for ip_early_demux sysctl 

commit 6648bd7e0e (ipv4: Add sysctl knob to control
early socket demux) introduced such sysctl, but forgot to add
doc into Documentation/networking/ip-sysctl.txt. This patch adds it.

Basically I grab the doc from the description of commit 41063e9dd1
(ipv4: Early TCP socket demux.) and the above commit.

Cc: Eric Dumazet <edumazet@google.com>
Cc: Alexander Duyck <alexander.h.duyck@intel.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Cong Wang 2013-06-11 18:54:39 +08:00 committed by David S. Miller
parent 944a1376b6
commit e3d73bcedf
1 changed files with 9 additions and 0 deletions
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9
Documentation/networking/ip-sysctl.txt
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@ -685,6 +685,15 @@ ip_dynaddr - BOOLEAN
occurs.
Default: 0
ip_early_demux - BOOLEAN
Optimize input packet processing down to one demux for
certain kinds of local sockets. Currently we only do this
for established TCP sockets.
It may add an additional cost for pure routing workloads that
reduces overall throughput, in such case you should disable it.
Default: 1
icmp_echo_ignore_all - BOOLEAN
If set non-zero, then the kernel will ignore all ICMP ECHO
requests sent to it.