Date: Wed, 6 Apr 2011 14:50:54 +0200
From: Markus Trippelsdorf <markus@trippelsdorf.de>
To: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Thomas Hellstrom <thomas@shipmail.org>, Dave Airlie <airlied@redhat.com>,
        linux-kernel@vger.kernel.org, dri-devel@lists.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
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 <20110406085407.GA1634@x4.trippels.de>
 <4D9C2ED7.9010906@shipmail.org>
 <20110406122715.GB5009@dumpdata.com>
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On 2011.04.06 at 08:27 -0400, Konrad Rzeszutek Wilk wrote:
> 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.

> .. 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

Oops, you're right. (copy&paste error)

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

No, I've just used the machine normally (browsing the net, viewing pdfs,
etc.) and triggered the warning two times in the last couple of days.

-- 
Markus
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