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authorEric Dumazet <dada1@cosmosbay.com>2007-03-04 16:05:44 -0800
committerDavid S. Miller <davem@sunset.davemloft.net>2007-04-25 22:23:27 -0700
commitfa438ccfdfd3f6db02c13b61b21454eb81cd6a13 (patch)
treea1759259d7543586185e2fb9db21461147944f18 /include/asm-ia64/termbits.h
parente317f6f69cb95527799d308a9421b7dc1252989a (diff)
[NET]: Keep sk_backlog near sk_lock
sk_backlog is a critical field of struct sock. (known famous words) It is (ab)used in hot paths, in particular in release_sock(), tcp_recvmsg(), tcp_v4_rcv(), sk_receive_skb(). It really makes sense to place it next to sk_lock, because sk_backlog is only used after sk_lock locked (and thus memory cache line in L1 cache). This should reduce cache misses and sk_lock acquisition time. (In theory, we could only move the head pointer near sk_lock, and leaving tail far away, because 'tail' is normally not so hot, but keep it simple :) ) Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/asm-ia64/termbits.h')
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