Date: Thu, 28 Jun 2007 17:00:47 +0200
From: Ingo Molnar <mingo@elte.hu>
To: Thomas Sattler <tsattler@gmx.de>
Cc: Oleg Nesterov <oleg@tv-sign.ru>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       Alan Cox <alan@lxorguk.ukuu.org.uk>
Subject: Re: 2.6.22-rc6 spurious hangs
Message-ID: <20070628150047.GA14494@elte.hu>
References: <4683BF16.40905@gmx.de> <20070628144741.GA437@tv-sign.ru> <4683CC89.80406@gmx.de>
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* Thomas Sattler <tsattler@gmx.de> wrote:

> >> As Ingo told me I run 'echo t > /proc/sysrq-trigger' this time. The
> >> corresponding part of my syslogs is attached, as well as my kernel config.
> > 
> > Could you try the patch below? It dumps some info when flush_workqueue()
> > hangs.
> 
> I'm compiling a patched kernel right now. As I wrote in my former mail 
> the whole thing not easy to trigger. So it can take some time to get 
> the info.

i'd suggest to increase CONFIG_LOG_BUF_SHIFT=17 to =20 in your .config - 
to make sure the full SysRq-t dump is captured when you do it.

	Ingo
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