From: Peter Zijlstra <peterz@infradead.org>
Date: Tue, 18 Oct 2011 20:03:48 +0000 (+0200)
Subject: sched/rt: Do not throttle when PI boosting
X-Git-Tag: v3.4-rc1~191^2~19
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7abc63b1bd412f7655b62ef3e35c3c11c5134636;p=pandora-kernel.git

sched/rt: Do not throttle when PI boosting

When a runqueue has rt_runtime_us = 0 then the only way it can
accumulate rt_time is via PI boosting. That causes the runqueue
to be throttled and replenishing does not change anything due to
rt_runtime_us = 0. So avoid that situation by clearing rt_time and
skip the throttling alltogether.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
[ Changelog ]
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/n/tip-7x70cypsotjb4jvcor3edctk@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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