From mboxrd@z Thu Jan  1 00:00:00 1970
From: Alexander Beregalov <a.beregalov-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Subject: Re: [Bug #14375] Intel(R) I/OAT DMA Engine init failed
Date: Tue, 27 Oct 2009 01:57:04 +0400
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To: "Rafael J. Wysocki" <rjw-KKrjLPT3xs0@public.gmane.org>
Cc: Linux Kernel Mailing List <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, Kernel Testers List <kernel-testers-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, Dan Williams <dan.j.williams-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>

2009/10/26 Rafael J. Wysocki <rjw-KKrjLPT3xs0@public.gmane.org>:
> This message has been generated automatically as a part of a report
> of recent regressions.
>
> The following bug entry is on the current list of known regressions
> from 2.6.31. =C2=A0Please verify if it still should be listed and let=
 me know
> (either way).
>
>
> Bug-Entry =C2=A0 =C2=A0 =C2=A0 : http://bugzilla.kernel.org/show_bug.=
cgi?id=3D14375
> Subject =C2=A0 =C2=A0 =C2=A0 =C2=A0 : Intel(R) I/OAT DMA Engine init =
failed
> Submitter =C2=A0 =C2=A0 =C2=A0 : Alexander Beregalov <a.beregalov@gma=
il.com>
> Date =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0: 2009-10-02 9:46 (25 d=
ays old)
> References =C2=A0 =C2=A0 =C2=A0: http://marc.info/?l=3Dlinux-kernel&m=
=3D125447680016160&w=3D4
> Handled-By =C2=A0 =C2=A0 =C2=A0: Dan Williams <dan.j.williams@intel.c=
om>
> Patch =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 : http://patchwork.kernel.or=
g/patch/51808/

When I patch reiserfs the bug goes to libata, it means ioatdma works
and libata does not. It looks like inaccurate work with memory
somewhere, but I do not know how to find it.
I cannot reproduce it since 2.6.32-rc3 and I do not see any bugs since =
then.