From: Jason Low <jason.low2@hp.com>
Date: Fri, 13 Sep 2013 18:26:51 +0000 (-0700)
Subject: sched: Reduce overestimating rq->avg_idle
X-Git-Tag: omap-for-v3.13/fixes-for-merge-window-take2~40^2~125
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=abfafa54db9aba404e8e6763503f04d35bd07138;p=pandora-kernel.git

sched: Reduce overestimating rq->avg_idle

When updating avg_idle, if the delta exceeds some max value, then avg_idle
gets set to the max, regardless of what the previous avg was. This can cause
avg_idle to often be overestimated.

This patch modifies the way we update avg_idle by always updating it with the
function call to update_avg() first. Then, if avg_idle exceeds the max, we set
it to the max.

Signed-off-by: Jason Low <jason.low2@hp.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Reviewed-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1379096813-3032-2-git-send-email-jason.low2@hp.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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