linux-kernel - Re: [regression] [drm:i915_gem_execbuffer] *ERROR* Execbuf while wedged

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Message-ID: <1258500401.6132.88.camel@macbook.infradead.org>
Date:	Tue, 17 Nov 2009 23:26:41 +0000
From:	David Woodhouse <dwmw2@...radead.org>
To:	"schnitzelkuchen@...glemail.com" <schnitzelkuchen@...glemail.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Wang, Zhenyu Z" <zhenyu.z.wang@...el.com>,
	"jbarnes@...tuousgeek.org" <jbarnes@...tuousgeek.org>
Subject: Re: [regression] [drm:i915_gem_execbuffer] *ERROR* Execbuf while
 wedged

On Sun, 2009-11-15 at 01:48 -0800, Michael wrote:
> 
> After bisecting i got to the following commit:
> 
> 176616814d700f19914d8509d9f65dec51a6ebf7 is the first bad commit
> commit 176616814d700f19914d8509d9f65dec51a6ebf7
> Author: Zhenyu Wang <zhenyu.z.wang@...el.com>
> Date:   Mon Jul 27 12:59:57 2009 +0100
> 
>     intel_agp: Use PCI DMA API correctly on chipsets new enough to
> have IOMMU

There are later commits which fixed some handling of addresses >4GiB --
it's not _entirely_ unexpected that that particular point in time didn't
work. It'll be using swiotlb instead of just addressing the page
directly.

Can you apply the patch in commit 135cbc4e (just the second part; the
addition) and check whether it still fails?

-- 
David Woodhouse                            Open Source Technology Centre
David.Woodhouse@...el.com                              Intel Corporation

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