linux-kernel - Re: 2.6.16.32 stuck in generic_file_aio

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Message-Id: <20061130212248.1b49bd32.akpm@osdl.org>
Date:	Thu, 30 Nov 2006 21:22:48 -0800
From:	Andrew Morton <akpm@...l.org>
To:	Igmar Palsenberg <i.palsenberg@...-ict.nl>
Cc:	linux-kernel@...r.kernel.org, erich@...ca.com.tw
Subject: Re: 2.6.16.32 stuck in generic_file_aio_write()

On Wed, 29 Nov 2006 13:41:37 +0100 (CET)
Igmar Palsenberg <i.palsenberg@...-ict.nl> wrote:

> I've got a machine which occasionally locks up. I can still sysrq it from 
> a serial console, so it's not entirely dead.
> 
> A sysrq-t learns me that it's got a large number of httpd processes stuck 
> in D state :

There are known deadlocks in generic_file_write() in kernels up to and
including 2.6.17.  Pagefaults are involved and I'd need to see the entire
sysrq-T output to determine if you're hitting that bug.


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