From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Mon, 10 May 2010 11:31:49 +0000 (+0000)
Subject: net: No dst refcounting in ip_queue_xmit()
X-Git-Tag: v2.6.35-rc1~473^2~78
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ab6e3feba1f1bc3b9418b854da6f481408d243de;p=pandora-kernel.git

net: No dst refcounting in ip_queue_xmit()

TCP outgoing packets can avoid two atomic ops, and dirtying
of previously higly contended cache line using new refdst
infrastructure.

Note 1: loopback device excluded because of !IFF_XMIT_DST_RELEASE
Note 2: UDP packets dsts are built before ip_queue_xmit().

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