[Intel-gfx] Recent regression on G965 with KMS

[Kenny Graunke]

Hello!

I just pulled from drm-intel-next today, and have had frequent but
intermittent hangs on my G965 with KMS.  They occur during ordinary use
(like trying to write this email!)  I do have compiz running, though.

Once it goes haywire, my dmesg is completely full of stuff like this:
[drm:i915_gem_execbuffer] *ERROR* Failed to pin buffers -12
[drm:i915_gem_evict_something] *ERROR* inactive empty 1 request empty 1 flushing empty 1
[drm:i915_gem_object_bind_to_gtt] *ERROR* Failed to evict a buffer -12
[drm:i915_gem_object_pin] *ERROR* Failure to bind: -12<3>[drm:i915_gem_evict_something] *ERROR* inactive empty 1 
request empty 1 flushing empty 1

(If it's helpful, the full dmesg is at http://www.whitecape.org/files/intel-gfx/kms-dmesg for now.)

I used git bisect, and it seems to have started with this commit:
commit deb1542d3b69727f7e55bc247796b7716ad95941
    drm/i915: Keep refs on the object over the lifetime of vmas for GTT mmap.

I'd be glad to test any patches or try and grab more information - let me know
how I can help.

Thanks!
--Kenny