From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Fri, 7 May 2010 04:58:51 +0000 (-0700)
Subject: net: Increase NET_SKB_PAD to 64 bytes
X-Git-Tag: v2.6.35-rc1~473^2~248
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=18e8c134f4e984e6639e62846345192816f06d5c;p=pandora-kernel.git

net: Increase NET_SKB_PAD to 64 bytes

eth_type_trans() & get_rps_cpus() currently need two 64bytes cache
lines in packet to compute rxhash.

Increasing NET_SKB_PAD from 32 to 64 reduces the need to one cache
line only, and makes RPS faster.

NET_IP_ALIGN(2) + ethernet_header(14) + IP_header(20/40) + ports(8)

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