From: Peter Zijlstra <peterz@infradead.org>
Date: Thu, 10 Nov 2011 12:01:10 +0000 (+0100)
Subject: sched: Avoid SMT siblings in select_idle_sibling() if possible
X-Git-Tag: v3.2-rc5~45^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4dcfe1025b513c2c1da5bf5586adb0e80148f612;p=pandora-kernel.git

sched: Avoid SMT siblings in select_idle_sibling() if possible

Avoid select_idle_sibling() from picking a sibling thread if there's
an idle core that shares cache.

This fixes SMT balancing in the increasingly common case where there's
a shared cache core available to balance to.

Tested-by: Mike Galbraith <efault@gmx.de>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Link: http://lkml.kernel.org/r/1321350377.1421.55.camel@twins
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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