linux-kernel - Re: [Bug #15004] i915: *ERROR* Execbuf while wedged

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Date:	Wed, 10 Feb 2010 08:44:22 -0800
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>
Cc:	Chris Mason <chris.mason@...cle.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Chris Wilson <chris@...is-wilson.co.uk>,
	tomas m <tmezzadra@...il.com>
Subject: Re: [Bug #15004] i915: *ERROR* Execbuf while wedged

On Mon, 8 Feb 2010 15:39:50 -0800
Jesse Barnes <jbarnes@...tuousgeek.org> wrote:

> On Mon, 8 Feb 2010 15:00:44 -0500
> Chris Mason <chris.mason@...cle.com> wrote:
> 
> > On Mon, Feb 08, 2010 at 09:35:51AM -0800, Jesse Barnes wrote:
> > > > 
> > > > Ok, updating to rc7 and updating my xf86 driver to 2.10 seems to
> > > > have fixed up my suspend/resume problems.  So, I should be able
> > > > to trigger the execbuf problem again.
> > > 
> > > I've heard some reports that the 2D driver introduces and fixes
> > > hangs, so it's possible 2.10 will fix both issues for you.
> > > 
> > > > Well, the rebooting isn't a huge deal, but if there's something
> > > > I can track/kick or force to core dump, would it help?
> > > 
> > > We do have a test in intel-gpu-tools that will instigate a hang,
> > > but it would be best to figure out what's causing it in your
> > > environment.
> > > 
> > 
> > [63516.632060] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer
> > elapsed... GPU hung [63516.632069] render error detected, EIR:
> > 0x00000000 [63516.632092] [drm:i915_do_wait_request] *ERROR*
> > i915_do_wait_request returns -5 (awaiting 2590581 at 2590579)
> > 
> > So, this popped up while surfing in firefox, which is usually where
> > I hit the execbuf errors.  X was totally stuck afterwards, but I
> > could switch to a vc and get the dmesg.
> > 
> > If there are specific procs that I can try to get traces of, just
> > let me know for next time.
> 
> Hm, EIR is clear so this may be a failure of our hangcheck timer.
> 
> Chris Wilson saw these recently too; hoping he has ideas.

The kernel bz was updated with a patch to libdrm that fixed this issue
for at least one user.  Can you confirm?

Thanks,
-- 
Jesse Barnes, Intel Open Source Technology Center
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