linux-kernel - Re: BUG: using smp_processor_id() in preemptible [00000000] code: pm-suspend/17334

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Date:	Wed, 4 Jun 2008 12:54:14 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Jiri Kosina <jkosina@...e.cz>
cc:	Zdenek Kabelac <zdenek.kabelac@...il.com>,
	linux-kernel@...r.kernel.org, kvm@...r.kernel.org, avi@...ranet.com
Subject: Re: BUG: using smp_processor_id() in preemptible [00000000] code:
 pm-suspend/17334

On Tue, 3 Jun 2008, Jiri Kosina wrote:
> > Ahh yes - you are right , I've completely forget about that old post -
> > I've thought  that my post are usually getting fixed sooner :)
> > So yes - this is actually the same bug which is still not fixed within
> > the latest kernel - the machine is running qemu guest (which seems to
> > me now somehow also slower)
> 
> OK, so it looks like KVM could be wrongly enabling IRQs/preemption on the 
> resume path. The original bug-report is on 
> http://lkml.org/lkml/2008/4/7/130

sysdev_resume() is supposed to run with interrupts disabled, at least
it was that way when the timekeeping_resume code was written.

Thanks,
	tglx
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