linux-kernel - Re: 2.6.20-git13 kernel BUG at /mnt/md0/devel/linux-git/kernel/time/tick-sched.c:168

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Message-Id: <1171736695.30834.143.camel@localhost.localdomain>
Date:	Sat, 17 Feb 2007 19:24:55 +0100
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Alex Riesen <fork0@...rs.sourceforge.net>
Cc:	Michal Piotrowski <michal.k.k.piotrowski@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...l.org>
Subject: Re: 2.6.20-git13 kernel BUG at
	/mnt/md0/devel/linux-git/kernel/time/tick-sched.c:168

On Sat, 2007-02-17 at 17:46 +0100, Alex Riesen wrote:
> > Can you please apply the patch below, so we can at least see, which
> > softirq is pending. This should trigger independently of hrtimers and
> > dynticks. You can keep it compiled in and disable it at the kernel
> > commandline with "nohz=off" and / or "highres=off"
> 
> It did, only one time:
> 
> Idle: local softirq pending: 0020<6>USB Universal Host Controller Interface driver v3.0

0x20 is the TASKLET_SOFTIRQ. I have no idea yet, how this can happen.

Can you please check, if this happens when you add "nohz=off" to the
kernel command line.

	tglx





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