linux-kernel - Re: 2.6.21-rc2-git3 soft lockup detected on CPU#0 (crash dump kernel)

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Message-ID: <6bffcb0e0703050347j5169c672g19996d5c76707123@mail.gmail.com>
Date:	Mon, 5 Mar 2007 12:47:26 +0100
From:	"Michal Piotrowski" <michal.k.k.piotrowski@...il.com>
To:	"Ingo Molnar" <mingo@...e.hu>
Cc:	"Thomas Gleixner" <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.21-rc2-git3 soft lockup detected on CPU#0 (crash dump kernel)

On 05/03/07, Ingo Molnar <mingo@...e.hu> wrote:
>
> * Thomas Gleixner <tglx@...utronix.de> wrote:
>
> > > shouldnt that be 'R' instead of the question mark?
> >
> > ? are dead ones,
>
> ok.
>
> > The interesting part is here:
> >
> > 1 lock held by udevd/918:
> >  #0:  (&mm->mmap_sem){----}, at: [<c161135b>] do_page_fault+0x150/0x50d
> >
> > But udevd/918 is nowhere in the sysrq-t output.
>
> also below is a softlockup-debug patch that might be useful, which adds
> a tick/tock output so it spams the console once per second but can show
> the dynamics of lockups (and other delays).

I have applied this patch
http://www.stardust.webpages.pl/files/tbf/bitis-gabonica/2.6.21-rc2-git3-kdump/log3.txt

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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