On Sat, Aug 29, 2015 at 11:15:53PM +0300, Ruslan Makhmatkhanov wrote:
> Hello,
>
> I'm getting tons of this in /var/log/messages:
> error: [drm:pid9:i915_gem_object_unbind] *ERROR* Attempting to unbind
> pinned buffer
>
> As far I understand [1], this case is harmless and there is no point to
> print it with DRM_ERROR - DRM_DEBUG is sufficient. Can we please change
> it in our tree like it done in patch attached? Thanks.
>
> PS. In Linux 3.8 [2] this check was changed by removing the warning
> altogether and just returning -EBUSY, so may be we can do just this to
> reduce the diff ;).
>
> [1] https://bugs.freedesktop.org/show_bug.cgi?id=50075
> [2]
> http://lxr.free-electrons.com/source/drivers/gpu/drm/i915/i915_gem.c?v=3.8
>
> --
> Regards,
> Ruslan
>
> T.O.S. Of Reality
> Index: sys/dev/drm2/i915/i915_gem.c
> ===================================================================
> --- sys/dev/drm2/i915/i915_gem.c (revision 287214)
> +++ sys/dev/drm2/i915/i915_gem.c (working copy)
> @@ -2528,7 +2528,7 @@
> return 0;
>
> if (obj->pin_count) {
> - DRM_ERROR("Attempting to unbind pinned buffer\n");
> + DRM_DEBUG("Attempting to unbind pinned buffer\n");
> return -EINVAL;
> }
>
I think this is not root of cause, this is only cause of other error:
=== dmesg ====
info: [drm] Initialized i915 1.6.0 20080730 for drmn0 on minor 0
error: [drm:pid12:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU
hung
info: [drm] capturing error event; look for more information in sysctl
hw.dri.0.info.i915_error_state
error: [drm:pid0:i915_reset] *ERROR* Failed to reset chip.
==============
This cause:
=== Xorg.log ====
[ 51.010] (EE) intel(0): Detected a hung GPU, disabling acceleration.
[ 51.010] (EE) intel(0): When reporting this, please include
i915_error_state from debugfs and the full dmesg.
=================
and after this you see Attempting to unbind pinned buffer.
I am see this in STABLE after Aug upgrade. I am don't see this at 2014-Oct
STABLE.
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