Re: [PATCH 16/27] drm/i915: Use atomic commits for legacy page_flips

On Wed, Jun 08, 2016 at 03:24:01PM +0100, Chris Wilson wrote:

On Wed, Jun 08, 2016 at 02:19:08PM +0200, Daniel Vetter wrote:

...

Note that I didn't start garbage collecting all the legacy flip code yet, to make it easier to revert this. But there will be _lots_ of code that can be removed once this is tested on all platforms.

FIXME: obj->frontbuffer_bits gets out of whack when pipelining commits too hard.

Possible to write a test case using dumb kms, or just point me at one you have already? :)

Argh, that FIXME is addressed by the next patch. Forgot to reorder them and drop the FIXME here. The rmfb worker vs. flips was enough concurrency to hit this bug. -Daniel