Messages in this thread | | | Date | Wed, 30 Sep 2009 09:50:43 +0200 | From | Michal Schmidt <> | Subject | Re: [2.6.31-git17] WARNING: at kernel/hrtimer.c:648 hres_timers_resume+0x40/0x50()/WARNING: at drivers/base/sys.c:353 __sysdev_resume+0xc3/0xe0() |
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Dne Tue, 29 Sep 2009 17:31:43 +0800 Yong Zhang <yong.zhang0@gmail.com> napsal(a):
> On Tue, Sep 29, 2009 at 3:24 PM, Ingo Molnar <mingo@elte.hu> wrote: > > Could you try this with .32-rc1? This commit should have fixed the > > message above: > > > > 89133f9: clocksource: Resume clocksource without taking the > > clocksource mutex > > > > Hi Ingo, > > Indeed, Maciej said this issue is gone with .32-rc1. But I don't think > this is the same > issue with 89133f9 because in this one timekeeping_resume() is called > with irq enabled. > This is very odd and the bug exists in other parts.
It is the same issue. Maciej has CONFIG_PREEMPT_VOLUNTARY=y which means taking the mutex in clocksource_resume() could have called into schedule(), thus enabling irqs.
Michal
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