Message-ID: <20030703153021.7491.qmail@web41111.mail.yahoo.com>
Date: Thu, 3 Jul 2003 08:30:21 -0700 (PDT)
From: Benjamin Stuhl <tiriath@yahoo.com>
Subject: Re: Yet another SDET hang (73-mm3) ... yawn
To: "Martin J. Bligh" <mbligh@aracnet.com>, Andrew Morton <akpm@digeo.com>
Cc: linux-kernel@vger.kernel.org
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"Martin J. Bligh" <mbligh@aracnet.com> wrote:
>
> 2.5.73-mm3 + feral + highpte (ext2)
>
> Seems to be all wedged up on io_schedule. Not sure if it
was
> highpte that caused this or not, but I'd done one run on
ext2
> and one on ext3 without it, and they worked fine. 

I have been wrestling myself with D state hangs (ext3/ 
reiserfs) in 2.5.7X-mmY for a while now, but haven't been 
able to capture a sysrq-T. I have a question, though 
(inspired by the trace you got): who does a finish_wait() 
for a !is_sync_wait() process after
blk_congestion_wait_wq() 
or __wait_on_buffer_wq()? Both of these functions can 
return after a prepare_to_wait() without a matching 
finish_wait(). 

So perhaps you could try backing out the aio-* patches?
Just 
a thought.

Please CC: me; I only read the archives.

-- BKS

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