Subject: Re: 2.6.5-rc1-mm2 and direct_read_under and wb
From: Chris Mason <mason@suse.com>
To: Daniel McNeil <daniel@osdl.org>
Cc: Andrew Morton <akpm@osdl.org>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       "linux-aio@kvack.org" <linux-aio@kvack.org>
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Date: Mon, 22 Mar 2004 13:23:20 -0500
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On Mon, 2004-03-22 at 13:10, Daniel McNeil wrote:
> Andrew and Chris,
> 
> I re-ran the direct_read_under tests over the weekend on ext3 with
> the attached wb_rwsema patch and ran without errors.
> 
> It looks like the same thing as before -- async writebacks are causing
> the sync writebacks to miss pages.
> 
> Thoughts?

It does seem clear that's what is happening, but the part I don't
understand is exactly where they are racing.

-chris


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