linux-kernel - Re: 2.6.32.21 - uptime related crashes?

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Message-ID: <kk5d3hgi9eh.fsf@brer.local.valinux.co.jp>
Date:	Tue, 12 Jul 2011 10:18:30 +0900
From:	MINOURA Makoto / 箕浦 真 
	<minoura@...inux.co.jp>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	john stultz <johnstul@...ibm.com>,
	Faidon Liambotis <paravoid@...ian.org>,
	linux-kernel@...r.kernel.org, stable@...nel.org,
	Nikola Ciprich <nikola.ciprich@...uxbox.cz>,
	seto.hidetoshi@...fujitsu.com,
	Hervé Commowick <hcommowick@...sec.fr>,
	Willy Tarreau <w@....eu>, Rand@...per.es
Subject: Re: 2.6.32.21 - uptime related crashes?


We're experiencing similar but slightly different
problems.  Some KVM hosts crash after 210-220 uptime.
Some of them hits divide-by-zero, but one of them shows:

[671528.8780080] BUG: soft lockup - CPU#4 stuck for 61s! [kvm:11131]

(sorry we have no full crash message including the backtrace)

The host kernel is 2.6.32.11-based (ubuntu 2.6.32-22-server,
2.6.32-22.36).

I'm not sure but probably the task scheduler is confusing by
the sched_clock overflow?

Thanks,

-- 
Minoura Makoto <minoura@...inux.co.jp>
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