From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Mon, 19 Apr 2010 21:56:38 +0000 (+0000)
Subject: rps: consistent rxhash
X-Git-Tag: v2.6.35-rc1~473^2~437
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b249dcb82d327e419d3cb45773b146ebb5faf419;p=pandora-kernel.git

rps: consistent rxhash

In case we compute a software skb->rxhash, we can generate a consistent
hash : Its value will be the same in both flow directions.

This helps some workloads, like conntracking, since the same state needs
to be accessed in both directions.

tbench + RFS + this patch gives better results than tbench with default
kernel configuration (no RPS, no RFS)

Also fixed some sparse warnings.

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