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

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Message-ID: <20070305115111.GA10675@elte.hu>
Date:	Mon, 5 Mar 2007 12:51:11 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Michal Piotrowski <michal.k.k.piotrowski@...il.com>
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)


* Michal Piotrowski <michal.k.k.piotrowski@...il.com> wrote:

> >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

thanks. It seems that the 'BUG: soft lockup detected' message does not 
occur in this log though - and that there are bootup messages between 
the two sysrq outputs:

[  221.101833] skge eth1: disabling interface
[  228.740911] audit(1173094442.943:11): user pid=3245 uid=0 
auid=4294967295 subj=system_u:system_r:hwclock_t:s0 msg='changing system 
time: exe="/sbin/hwclock"
(hostname=?, addr=?, terminal=console res=success)'
[  233.148571] md: md1 in immediate safe mode

plus there's trouble with irq 10:

[  132.013194] irq 10: nobody cared (try booting with the "irqpoll" option)
[  132.072771] Disabling IRQ #10

that prompted you to enable irqpoll, right? So am i right that without 
irqpoll there's no lockup?

	Ingo
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