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Date: Thu, 17 Jun 2004 18:47:23 -0700
From: Andrew Morton <akpm@osdl.org>
To: Chris Mason <mason@suse.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] ext3 jbd needs to wait for locked buffers
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Chris Mason <mason@suse.com> wrote:
>
> jbd needs to wait for any io to complete on the buffer before
>  changing the end_io function.

Thanks, I bet that was fun to hunt down.

Same problem in 2.4, although there it looks like it'll just cause a memory
leak.  I guess if an app is mmapping a blockdev we could end up with a
permanently locked page though.