tree 1ff63be39ccd22175d4fa61683865664181fef38
parent 459ca7e5283914845d7139905ff58824d2b0cc85
author Marcin Slusarz <marcin.slusarz@gmail.com> 1299676939 +0100
committer Ben Skeggs <bskeggs@redhat.com> 1300084516 +1000

drm/nouveau: fix __nouveau_fence_wait performance

Commit 21e86c1c8a844bf978f8fc431a59c9f5a578812d ("drm/nouveau: remove
cpu_writers lock") turned on lazy waits. Unfortunately
__nouveau_fence_wait was not optimized for this case and on HZ=100
kernel wasted up to 10 ms per call.

Depending on application, it led to 10-30% FPS regression.

Fix it.

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: Francisco Jerez <currojerez@riseup.net>