From: David S. Miller <davem@sunset.davemloft.net>
Date: Fri, 10 Nov 2006 03:58:25 +0000 (-0800)
Subject: [TCP]: Don't set SKB owner in tcp_transmit_skb().
X-Git-Tag: v2.6.20-rc1~34^2~40^2~416
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=931731123a103cfb3f70ac4b7abfc71d94ba1f03;p=pandora-kernel.git

[TCP]: Don't set SKB owner in tcp_transmit_skb().

The data itself is already charged to the SKB, doing
the skb_set_owner_w() just generates a lot of noise and
extra atomics we don't really need.

Lmbench improvements on lat_tcp are minimal:

before:
TCP latency using localhost: 23.2701 microseconds
TCP latency using localhost: 23.1994 microseconds
TCP latency using localhost: 23.2257 microseconds

after:
TCP latency using localhost: 22.8380 microseconds
TCP latency using localhost: 22.9465 microseconds
TCP latency using localhost: 22.8462 microseconds

Signed-off-by: David S. Miller <davem@davemloft.net>
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