Date: Wed, 13 Feb 2008 01:32:55 -0800
From: Andrew Morton <akpm@linux-foundation.org>
To: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Bart Dopheide <dopheide@fmf.nl>, Alan Cox <alan@lxorguk.ukuu.org.uk>,
       linux-kernel@vger.kernel.org,
       OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>,
       Jens Axboe <jens.axboe@oracle.com>,
       Bartlomiej Zolnierkiewicz <mzolnier@gmail.com>
Subject: Re: Kernel BUG at fs/mpage.c:489
Message-Id: <20080213013255.b4ea534c.akpm@linux-foundation.org>
In-Reply-To: <200802132024.03687.nickpiggin@yahoo.com.au>
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On Wed, 13 Feb 2008 20:24:03 +1100 Nick Piggin <nickpiggin@yahoo.com.au> wrote:

> BTW is it really true that the buffer can never be locked by
> anything else at this point?

It has been for the past five or six years.  With the page locked, nobody
else can get at that page.

> What about fsync_buffers_list?

They're metadata buffers, not regular file data.  Things might get ugly if
IO to /dev/sda went via that path, but it doesn't.

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