Re: 2.6.16.32 stuck in generic_file_aio_write()

From: Andrew Morton
Date: Fri Dec 01 2006 - 00:23:47 EST


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