Re: [Bug #14375] Intel(R) I/OAT DMA Engine init failed

[Alexander Beregalov <a.beregalov-Re5JQEeQqe8AvxtiuMwx3w@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.  Please verify if it still should be listed and let me know
> (either way).
>
>
> Bug-Entry       : http://bugzilla.kernel.org/show_bug.cgi?id=14375
> Subject         : Intel(R) I/OAT DMA Engine init failed
> Submitter       : Alexander Beregalov <a.beregalov@gmail.com>
> Date            : 2009-10-02 9:46 (25 days old)
> References      : http://marc.info/?l=linux-kernel&m=125447680016160&w=4
> Handled-By      : Dan Williams <dan.j.williams@intel.com>
> Patch           : http://patchwork.kernel.org/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.