]> git.baikalelectronics.ru Git - kernel.git/commit
drm/i915: Remove livelock from "do_idle_maps" vtd w/a
authorChris Wilson <chris@chris-wilson.co.uk>
Wed, 9 Dec 2020 16:40:06 +0000 (16:40 +0000)
committerChris Wilson <chris@chris-wilson.co.uk>
Wed, 9 Dec 2020 19:32:51 +0000 (19:32 +0000)
commit45d442dfab936f517ebc34e15709f4bb0d7c15f1
tree5efeff5706bbdfdf2f4b245f0a48475ce16dba31
parent6900f8f782740a77219ad6f0aabc57e623a602b0
drm/i915: Remove livelock from "do_idle_maps" vtd w/a

A call to wait for the GT to idle from inside the put_pages fallback is
prone to cause an uninterruptible livelock. As it does not provide
adequate serialisation with new requests, simply fallback to a trivial
sleep.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201209164008.5487-1-chris@chris-wilson.co.uk
drivers/gpu/drm/i915/i915_gem_gtt.c