[Intel-gfx] [PATCH 2/2] drm/i915: Repeat evictions whilst pageflip completions are outstanding

[Daniel Vetter]

On Tue, Jan 21, 2014 at 11:03:43AM +0000, Bloomfield, Jon wrote:
> > From: intel-gfx-bounces at lists.freedesktop.org [mailto:intel-gfx-
> > bounces at lists.freedesktop.org] On Behalf Of Chris Wilson
> > Sent: Monday, January 20, 2014 10:18 AM
> > To: intel-gfx at lists.freedesktop.org
> > Subject: [Intel-gfx] [PATCH 2/2] drm/i915: Repeat evictions whilst pageflip
> > completions are outstanding
> > 
> > Since an old pageflip will keep its scanout buffer object pinned until it has
> > executed its unpin task on the common workqueue, we can clog up our
> > GGTT with stale pinned objects. As we cannot flush those workqueues
> > without dropping our locks, we have to resort to falling back to userspace
> > and telling them to repeat the operation in order to have a chance to run our
> > workqueues and free up the required memory. If we fail, then we are forced
> > to report ENOSPC back to userspace causing the operation to fail and best-
> > case scenario is that it introduces temporary corruption.
> > 
> > Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> 
> Reviewed-by: Jon Bloomfield <jon.bloomfield at intel.com>

Both merged, with some frobbery to make the 2nd patch apply.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch