From mboxrd@z Thu Jan  1 00:00:00 1970
From: Milan Broz <mbroz@redhat.com>
Subject: Re: Calltrace in dm-snapshot in 2.6.27 kernel
Date: Mon, 20 Oct 2008 10:43:04 +0200
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aluno3@poczta.onet.pl wrote:
> I've got this calltrace from our QA team. They say that they mad few
> snapshots, run several programs like bacula or rsync and that calltrace
> is appearing about 1 hour after starting those programs.

Hi,
if it is reproducible, please can you try if this patch helps?
http://www.kernel.org/pub/linux/kernel/people/agk/patches/2.6/editing/dm-snapshot-fix-primary_pe-race.patch

Probably the same problem reported here
http://bugzilla.kernel.org/show_bug.cgi?id=11636

(Added Mikulas to CC)

Milan
--
mbroz@redhat.com