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Date: Mon, 22 Aug 2005 23:30:51 -0700
From: Andrew Morton <akpm@osdl.org>
To: Hans-Joachim Baader <hjb@pro-linux.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Process in D state with st driver
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Hans-Joachim Baader <hjb@pro-linux.de> wrote:
>
> I do nightly backups on tape. Every 3 to 4 weeks a process is stuck in
>  D state while accessing the drive:
> 
>  12398 ?        D      0:00 /usr/sbin/amcheck -ms daily
> 
>  There are no messages in the log. Only a reboot can remove this process.

Next time it happens, do

	dmesg -c
	echo t > /proc/sysrq-trigger
	dmesg -s 1000000 > foo

and send foo, thanks.