From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Wed, 20 Oct 2010 22:03:38 +0000 (+0000)
Subject: fib: introduce fib_alias_accessed() helper
X-Git-Tag: v2.6.37-rc1~147^2~46
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9b0c290e78d667e6a483bde8c7cef7dd15f49017;p=pandora-kernel.git

fib: introduce fib_alias_accessed() helper

Perf tools session at NFWS 2010 pointed out a false sharing on struct
fib_alias that can be avoided pretty easily, if we set FA_S_ACCESSED bit
only if needed (ie : not already set)

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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