From: Eric Dumazet <dada1@cosmosbay.com>
Date: Fri, 8 Dec 2006 08:08:43 +0000 (-0800)
Subject: [NET]: Force a cache line split in hh_cache in SMP.
X-Git-Tag: v2.6.20-rc1~34^2~28^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f0490980a152958d25ce9762bfb296d8fd4c5512;p=pandora-kernel.git

[NET]: Force a cache line split in hh_cache in SMP.

hh_lock was converted from rwlock to seqlock by Stephen.

To have a 100% benefit of this change, I suggest to place read mostly fields
of hh_cache in a separate cache line, because hh_refcnt may be changed quite
frequently on some busy machines.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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