From: Paul Menage <menage@google.com>
Date: Thu, 29 Jan 2009 22:25:21 +0000 (-0800)
Subject: cgroups: add cpu_relax() calls in css_tryget() and cgroup_clear_css_refs()
X-Git-Tag: v2.6.29-rc4~112
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=804b3c28a4e4fa1c224571bf76edb534b9c4b1ed;p=pandora-kernel.git

cgroups: add cpu_relax() calls in css_tryget() and cgroup_clear_css_refs()

css_tryget() and cgroup_clear_css_refs() contain polling loops; these
loops should have cpu_relax calls in them to reduce cross-cache traffic.

Signed-off-by: Paul Menage <menage@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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