linux-kernel - Re: WARNING: at drivers/gpu/drm/ttm/ttm_page_alloc.c:758 .. [GIT PULL] stable/ttm.pci-api-rc2 for 2.6.39-rc2

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Date:	Wed, 6 Apr 2011 08:27:15 -0400
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	Thomas Hellstrom <thomas@...pmail.org>,
	Dave Airlie <airlied@...hat.com>
Cc:	Markus Trippelsdorf <markus@...ppelsdorf.de>,
	linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org
Subject: Re: WARNING: at drivers/gpu/drm/ttm/ttm_page_alloc.c:758 .. [GIT
 PULL] stable/ttm.pci-api-rc2 for 2.6.39-rc2

On Wed, Apr 06, 2011 at 11:13:59AM +0200, Thomas Hellstrom wrote:
> Dave, Konrad
> 
> I think we need to back out this change as soon as possible. I will
> follow up the discussion with Konrad on how we should attempt to
> handle vm passthrough as soon as things settle down a bit over here.

Ok. I believe just reverting this particular git commit

69a07f0b117a40fcc1a479358d8e1f41793617f2

does it. Doing it on top of v2.6.39-rc1:

ated: 2427 deleted: 1229), skipping inexact rename detection
Finished one revert.
[stable/ttm.pci-api-rc2 97bbc38] Revert "ttm: Utilize the DMA API for pages that have TTM_PAGE_FLAG_DMA32 set."
 1 files changed, 3 insertions(+), 23 deletions(-)

shows it to being a nice easy backout.

Dave, I stuck the revert on

git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen.git stable/ttm.pci-api-rc2

Please pull for rc2.

> Hopefully this week.

Thomas, waiting for your input on
http://mid.gmane.org/20110331154954.GA7695@dumpdata.com
(ignore point 1, please).

.. snip..
> >Looks like this is caused by f9820a46dd7888b05a36e81166fb1abcc47dcc3f :

Wrong git commit.

> >
> >  ttm: Utilize the DMA API for pages that have TTM_PAGE_FLAG_DMA32 set.

It is 69a07f0b117a40fcc1a479358d8e1f41793617f2

> >
> >CCing the relevant people.

How did you make the machine to do this? Did you just echo XX > to the shrinker?

> >
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