From: Ingo Molnar <mingo@elte.hu>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Alex Nixon <alex.nixon@citrix.com>,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] sched: fix rt-bandwidth hotplug race
Date: Thu, 14 Aug 2008 15:51:22 +0200 [thread overview]
Message-ID: <20080814135122.GB14333@elte.hu> (raw)
In-Reply-To: <1218721740.10800.230.camel@twins>
* Peter Zijlstra <peterz@infradead.org> wrote:
> Subject: sched: fix rt-bandwidth hotplug race
> From: Peter Zijlstra <a.p.zijlstra@chello.nl>
> Date: Thu Aug 14 15:42:44 CEST 2008
>
> 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>
applied to tip/sched/urgent - thanks!
Ingo
prev parent reply other threads:[~2008-08-14 13:51 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-14 13:49 Peter Zijlstra
2008-08-14 13:51 ` Ingo Molnar [this message]
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