linux-kernel - Re: [patch] CPU hotplug: call check_tsc_sync

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Message-ID: <6bffcb0e0703070945v2c27497fg3d2b94363218fd@mail.gmail.com>
Date:	Wed, 7 Mar 2007 18:45:59 +0100
From:	"Michal Piotrowski" <michal.k.k.piotrowski@...il.com>
To:	"Ingo Molnar" <mingo@...e.hu>
Cc:	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	"Pavel Machek" <pavel@....cz>, "Rafael J. Wysocki" <rjw@...k.pl>,
	"Thomas Gleixner" <tglx@...utronix.de>
Subject: Re: [patch] CPU hotplug: call check_tsc_sync_source() with irqs off

On 07/03/07, Ingo Molnar <mingo@...e.hu> wrote:
>
> * Linus Torvalds <torvalds@...ux-foundation.org> wrote:
>
> > [ Ingo and Thomas added to Cc, because I think this is them.. ]
> >
> > Ingo, I think this came in during commit 95492e4646, "x86: rewrite SMP
> > TSC sync code".
>
> yeah.
>
> > > I get this while
> > > echo shutdown > /sys/power/disk; echo disk > /sys/power/state
> > >
> > > BUG: using smp_processor_id() in preemptible [00000001] code: swsusp_shutdown/3359
> > > caller is check_tsc_sync_source+0x1b/0xef
>
> Michal, could you try the patch below?
>

I think that this patch fixes the problem. Thanks!

Regards,
Michal

-- 
Michal K. K. Piotrowski
LTG - Linux Testers Group (PL)
(http://www.stardust.webpages.pl/ltg/)
LTG - Linux Testers Group (EN)
(http://www.stardust.webpages.pl/linux_testers_group_en/)
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