* [drm:i915_gem_mmap_gtt_ioctl] *ERROR* Attempting to mmap a purgeable buffer
@ 2010-10-20 9:07 Alexey Fisher
2010-10-20 9:15 ` Chris Wilson
0 siblings, 1 reply; 3+ messages in thread
From: Alexey Fisher @ 2010-10-20 9:07 UTC (permalink / raw)
To: intel-gfx@lists.freedesktop.org
Hallo all,
I get fallowing error in my log:
[ 6657.465805] [drm:i915_gem_mmap_gtt_ioctl] *ERROR* Attempting to mmap
a purgeable buffer
[ 6657.465851] [drm:i915_gem_mmap_gtt_ioctl] *ERROR* Attempting to mmap
a purgeable buffer
[ 6657.465907] [drm:i915_gem_mmap_gtt_ioctl] *ERROR* Attempting to mmap
a purgeable buffer
das it mean any thing for you? do i need to bisect it?
I use current 2.6.36-rc8-01141-ga5ffe0a from intel drm next.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [drm:i915_gem_mmap_gtt_ioctl] *ERROR* Attempting to mmap a purgeable buffer
2010-10-20 9:07 [drm:i915_gem_mmap_gtt_ioctl] *ERROR* Attempting to mmap a purgeable buffer Alexey Fisher
@ 2010-10-20 9:15 ` Chris Wilson
2010-10-20 10:03 ` Alexey Fisher
0 siblings, 1 reply; 3+ messages in thread
From: Chris Wilson @ 2010-10-20 9:15 UTC (permalink / raw)
To: Alexey Fisher, intel-gfx@lists.freedesktop.org
On Wed, 20 Oct 2010 11:07:20 +0200, Alexey Fisher <bug-track@fisher-privat.net> wrote:
> Hallo all,
>
> I get fallowing error in my log:
> [ 6657.465805] [drm:i915_gem_mmap_gtt_ioctl] *ERROR* Attempting to mmap
> a purgeable buffer
> [ 6657.465851] [drm:i915_gem_mmap_gtt_ioctl] *ERROR* Attempting to mmap
> a purgeable buffer
> [ 6657.465907] [drm:i915_gem_mmap_gtt_ioctl] *ERROR* Attempting to mmap
> a purgeable buffer
>
> das it mean any thing for you? do i need to bisect it?
> I use current 2.6.36-rc8-01141-ga5ffe0a from intel drm next.
It's warning that userspace is breaking the rules and trying to use a
buffer it has declared no longer in use. The challenge is to find the
scenario that is triggering this *userspace* bug.
Currently, purgeable is usually only set on the userspace bo cache, so
this means that we are continuing to use a freed buffer. Disabling (or
marking the cache as NO_ACCESS) and valgrinding would be a useful step.
Or just kill the userspace cache and implement a kernel uncached page
cache... Less code, more performance, everyone is happy...
-Chris
--
Chris Wilson, Intel Open Source Technology Centre
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [drm:i915_gem_mmap_gtt_ioctl] *ERROR* Attempting to mmap a purgeable buffer
2010-10-20 9:15 ` Chris Wilson
@ 2010-10-20 10:03 ` Alexey Fisher
0 siblings, 0 replies; 3+ messages in thread
From: Alexey Fisher @ 2010-10-20 10:03 UTC (permalink / raw)
To: Chris Wilson; +Cc: intel-gfx@lists.freedesktop.org
Am Mittwoch, den 20.10.2010, 10:15 +0100 schrieb Chris Wilson:
> On Wed, 20 Oct 2010 11:07:20 +0200, Alexey Fisher <bug-track@fisher-privat.net> wrote:
> > Hallo all,
> >
> > I get fallowing error in my log:
> > [ 6657.465805] [drm:i915_gem_mmap_gtt_ioctl] *ERROR* Attempting to mmap
> > a purgeable buffer
> > [ 6657.465851] [drm:i915_gem_mmap_gtt_ioctl] *ERROR* Attempting to mmap
> > a purgeable buffer
> > [ 6657.465907] [drm:i915_gem_mmap_gtt_ioctl] *ERROR* Attempting to mmap
> > a purgeable buffer
> >
> > das it mean any thing for you? do i need to bisect it?
> > I use current 2.6.36-rc8-01141-ga5ffe0a from intel drm next.
>
> It's warning that userspace is breaking the rules and trying to use a
> buffer it has declared no longer in use. The challenge is to find the
> scenario that is triggering this *userspace* bug.
>
> Currently, purgeable is usually only set on the userspace bo cache, so
> this means that we are continuing to use a freed buffer. Disabling (or
> marking the cache as NO_ACCESS) and valgrinding would be a useful step.
>
> Or just kill the userspace cache and implement a kernel uncached page
> cache... Less code, more performance, everyone is happy...
According to kernel logs, and time of this logs, this is some where
bethwene the bug in firefox and compiz. At the time I produced this
video for bugreport:
http://videobin.org/+281/2il.html
and switched compiz off and on.
The problem, if i reproduce this steps i get other log:
[14396.675124] [drm:i915_gem_object_bind_to_gtt] *ERROR* Attempting to
bind a purgeable object
[14473.046399] [drm:i915_gem_object_bind_to_gtt] *ERROR* Attempting to
bind a purgeable object
^ permalink raw reply [flat|nested] 3+ messages in thread
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2010-10-20 9:07 [drm:i915_gem_mmap_gtt_ioctl] *ERROR* Attempting to mmap a purgeable buffer Alexey Fisher
2010-10-20 9:15 ` Chris Wilson
2010-10-20 10:03 ` Alexey Fisher
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