From: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date: Thu, 14 Aug 2008 13:49:00 +0000 (+0200)
Subject: sched: fix rt-bandwidth hotplug race
X-Git-Tag: v2.6.27-rc4~51^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f1679d08480008e06fd619c71635ed33274e2595;p=pandora-kernel.git

sched: fix rt-bandwidth hotplug race

When we hot-unplug a cpu and rebuild the sched-domain, all cpus will be
detatched. Alex observed the case where a runqueue was stealing bandwidth
from an already disabled runqueue to satisfy its own needs.

Stop this by skipping over already disabled runqueues.

Reported-by: Alex Nixon <alex.nixon@citrix.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Tested-by: Alex Nixon <alex.nixon@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

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