linux-kernel - Re: [git pull] drm main pull for 3.4-rc1

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Date:	Tue, 27 Mar 2012 21:31:24 +0200
From:	Daniel Vetter <daniel@...ll.ch>
To:	Tony Vroon <tony@...x.net>
Cc:	Dave Airlie <airlied@...ux.ie>,
	DRI mailing list <dri-devel@...ts.freedesktop.org>,
	linux-kernel@...r.kernel.org, Matt Turner <mattst88@...il.com>
Subject: Re: [git pull] drm main pull for 3.4-rc1

On Mon, Mar 26, 2012 at 03:44:33PM +0100, Tony Vroon wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> On 26/03/12 15:32, Daniel Vetter wrote:
> > Also, can you check whether disabling vt-d does work around the
> > issue?
> 
> Yes, that does appear to stay operational for longer on:
> Linux adrastea 3.3.0-06972-ge22057c #1 SMP PREEMPT Mon Mar 26 11:29:21
> BST 2012 x86_64 Intel(R) Core(TM) i7-2620M CPU @ 2.70GHz GenuineIntel
> GNU/Linux
> 
> Obviously I would like to have x2apic and my IOMMU back...

Can you try out the for-chainsaw branch from

git://people.freedesktop.org/~danvet/drm

Afaics it seems to help here on my snb with VT-d enabled. But that means
it'll still crash eventually with tons of DMAR fault message (like yours).
But compared to previous kernels it now doesn't insta-die for me. So no
high hopes, please, but it would be interesting to know how this fares for
you.

Meanwhile I'll be trying a few other funky tricks.
-Daniel
-- 
Daniel Vetter
Mail: daniel@...ll.ch
Mobile: +41 (0)79 365 57 48
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