linux-kernel - Re: 3.6.11 AMD-Vi: Completion-Wait loop timed out

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Message-ID: <50FBDA9A.3000101@xs4all.nl>
Date:	Sun, 20 Jan 2013 12:52:58 +0100
From:	Udo van den Heuvel <udovdh@...all.nl>
To:	Borislav Petkov <bp@...en8.de>,
	Jörg Rödel <joro@...tes.org>,
	linux-kernel@...r.kernel.org,
	Boris Ostrovsky <boris.ostrovsky@....com>,
	Jacob Shin <jacob.shin@....com>
Subject: Re: 3.6.11  AMD-Vi: Completion-Wait loop timed out

On 2013-01-20 12:48, Borislav Petkov wrote:
> On Sun, Jan 20, 2013 at 12:40:11PM +0100, Jörg Rödel wrote:
>> Yes, the BIOS vendor can fix this issue. They need to disable NB clock
>> gating for the IOMMU.
> 
> Right, Udo, you can try Gigabyte first.

I just did so and referred to the kernel.org bugzilla.

> Btw, can't we add a quirk to disable NB clock gating? Maybe Boris and
> Jacob could help. CCed.

That would be most helpful!
Of course I can help testing but the issue happened only 1 time so far.

The person from
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1073384 had more
bad luck in experiencing the issue.

Thanks,
Udo

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