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fib: introduce fib_alias_accessed() helper
authorEric Dumazet <eric.dumazet@gmail.com>
Wed, 20 Oct 2010 22:03:38 +0000 (22:03 +0000)
committerDavid S. Miller <davem@davemloft.net>
Thu, 21 Oct 2010 10:09:41 +0000 (03:09 -0700)
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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