linux-kernel - Re: 2.6.20-git15 BUG: soft lockup detected on CPU#0!

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Date:	Sat, 24 Feb 2007 23:45:54 +0100
From:	"Michal Piotrowski" <michal.k.k.piotrowski@...il.com>
To:	"Ingo Molnar" <mingo@...e.hu>
Cc:	"Michal Piotrowski" <michal.k.k.piotrowski@...glemail.com>,
	tglx@...utronix.de, LKML <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.20-git15 BUG: soft lockup detected on CPU#0! - timers?

Hi Ingo,

On 23/02/07, Ingo Molnar <mingo@...e.hu> wrote:
>
> Michal,
>
> * Michal Piotrowski <michal.k.k.piotrowski@...il.com> wrote:
>
> > Here is more
> >
> > hardirqs last  enabled at (30787): [<c0104249>] syscall_exit_work+0x11/0x26
> > hardirqs last disabled at (30788): [<c0103fc9>] ret_from_exception+0x9/0xc
> > softirqs last  enabled at (30202): [<c01265df>] __do_softirq+0xe4/0xea
> > softirqs last disabled at (30193): [<c0106a75>] do_softirq+0x64/0xd1
>
> could you please try the patch below? This is pretty much the only
> condition under which we can silently 'leak' pending softirqs, and
> trigger the new warning: if something does cond_resched_softirq() in
> non-runnable state. (which is a no-no, but nothing enforced this, so it
> could in theory happen.) So the question is, with this patch applied, do
> you get these new warnings from sched.c?

Here is a dmesg after over 25 hours of uptime
http://www.stardust.webpages.pl/files/tbf/bitis-gabonica/2.6.21-rc1/git-dmesg3
nothing new.

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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