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Date:	Thu, 30 Nov 2006 21:22:48 -0800
From:	Andrew Morton <>
To:	Igmar Palsenberg <>
Subject: Re: stuck in generic_file_aio_write()

On Wed, 29 Nov 2006 13:41:37 +0100 (CET)
Igmar Palsenberg <> 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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