netdev - [PATCH] NET : force a cache line split in hh

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Message-id: <45791D08.7070804@cosmosbay.com>
Date:	Fri, 08 Dec 2006 09:06:32 +0100
From:	Eric Dumazet <dada1@...mosbay.com>
To:	David Miller <davem@...emloft.net>
Cc:	shemminger@...l.org, netdev@...r.kernel.org
Subject: [PATCH] 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@...mosbay.com>

View attachment "hh_cache.patch" of type "text/plain" (870 bytes)