From: Eliezer Tamir <eliezer.tamir@linux.intel.com>
Date: Sun, 25 Aug 2013 07:23:46 +0000 (+0300)
Subject: net: add cpu_relax to busy poll loop
X-Git-Tag: v3.11~4^2~16
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3046e2f5b79a86044ac0a29c69610d6ac6a4b882;p=pandora-kernel.git

net: add cpu_relax to busy poll loop

Add a cpu_relaxt to sk_busy_loop.

Julie Cummings reported performance issues when hyperthreading is on.
Arjan van de Ven observed that we should have a cpu_relax() in the
busy poll loop.

Reported-by: Julie Cummings <julie.a.cummings@intel.com>
Signed-off-by: Eliezer Tamir <eliezer.tamir@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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