From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Yong Zhang <yong.zhang0@gmail.com>
Cc: mingo@redhat.com, hpa@zytor.com, linux-kernel@vger.kernel.org,
efault@gmx.de, bbb.lst@gmail.com, tglx@linutronix.de,
mingo@elte.hu, linux-tip-commits@vger.kernel.org
Subject: Re: [tip:sched/urgent] Sched: fix skip_clock_update optimization
Date: Fri, 10 Dec 2010 17:17:48 +0100 [thread overview]
Message-ID: <1291997868.13513.15.camel@laptop> (raw)
In-Reply-To: <AANLkTi=z3kQJfRqpA5iw91CWyGKnuAC1+qWdao_mS5+4@mail.gmail.com>
On Fri, 2010-12-10 at 10:33 +0800, Yong Zhang wrote:
>
> I don't see it on my side.
> Then just show some info(don't know if it's helpful):
> wake_up_idle_cpu() can set TIF_RESCHED locklessly.
>
> So does
> WARN_ON_ONCE(next != rq->idle && test_tsk_need_resched(next));
> help?
Its a good possibility, sadly I haven't been able to reproduce so I
cannot confirm. I'll keep my machine running, maybe it will trigger in a
few hours.
next prev parent reply other threads:[~2010-12-10 16:18 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-21 4:22 Scheduler bug related to rq->skip_clock_update? Bjoern B. Brandenburg
2010-11-21 17:14 ` Mike Galbraith
2010-11-22 4:29 ` Bjoern B. Brandenburg
2010-11-22 16:19 ` Mike Galbraith
2010-11-22 18:14 ` Bjoern B. Brandenburg
2010-12-04 7:42 ` Yong Zhang
2010-12-04 14:05 ` Yong Zhang
2010-12-04 14:08 ` Yong Zhang
2010-12-04 14:33 ` Yong Zhang
2010-12-05 5:28 ` Yong Zhang
2010-12-06 5:33 ` Mike Galbraith
2010-12-06 7:59 ` Yong Zhang
2010-12-06 8:32 ` [patchlet] " Mike Galbraith
2010-12-07 16:41 ` Peter Zijlstra
2010-12-07 18:55 ` Mike Galbraith
2010-12-08 10:05 ` Mike Galbraith
2010-12-08 11:12 ` Peter Zijlstra
2010-12-08 20:40 ` [tip:sched/urgent] Sched: fix skip_clock_update optimization tip-bot for Mike Galbraith
2010-12-09 15:32 ` Peter Zijlstra
2010-12-10 2:33 ` Yong Zhang
2010-12-10 16:17 ` Peter Zijlstra [this message]
2010-12-06 15:40 ` Scheduler bug related to rq->skip_clock_update? Bjoern B. Brandenburg
2010-12-03 12:41 ` Peter Zijlstra
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