[Intel-gfx] [PATCH] drm/i915: Flush outstanding unpin tasks before pageflipping

[Daniel Vetter]

On Thu, Nov 01, 2012 at 09:26:26AM +0000, Chris Wilson wrote:
> If we accumulate unpin tasks because we are pageflipping faster than the
> system can schedule its workers, we can effectively create a
> pin-leak. The solution taken here is to limit the number of unpin tasks
> we have per-crtc and to flush those outstanding tasks if we accumulate
> too many. This should prevent any jitter in the normal case, and also
> prevent the hang if we should run too fast.
> 
> Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=46991
> Reported-and-tested-by: Tvrtko Ursulin <tvrtko.ursulin at onelan.co.uk>
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

Queued for -next with a note added to the commit message about the
workqueue related deadlock. Thanks for the patch.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch