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Subject: Re: AIO/DIO lockup/crash
From: Peter Zijlstra <peterz@infradead.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel <linux-kernel@vger.kernel.org>,
       linux-aio <linux-aio@kvack.org>, Zach Brown <zach.brown@oracle.com>,
       Clark Williams <williams@redhat.com>
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Date: Mon, 28 Apr 2008 19:48:29 +0200
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On Mon, 2008-04-28 at 09:08 -0700, Andrew Morton wrote:

> erk, that's dio->bio_lock, isn't it?

Yep.

> That lock is super-simple and hasn't changed in quite some time.  If there
> has been major memory wreckage and we're simply grabbing at a "lock" in
> random memory then I'd expect the bug to maninfest in different ways on
> different runs?

Looks like it.

> I assume you have lots of runtime debugging options enabled.

Not on this particular run. I'll start a -git run this evening with most
of the debugging option enabled. It takes a few hours to reproduce, so I
let it run over-night.