[Intel-gfx] [PATCH v3 04/13] drm/i915/execlists: Cache the last priolist lookup

[Chris Wilson]

Quoting Chris Wilson (2017-09-28 20:39:01)
> From: Michał Winiarski <michal.winiarski at intel.com>
> 
> Avoid the repeated rbtree lookup for each request as we unwind them by
> tracking the last priolist.
> 
> v2: Fix up my unhelpful suggestion of using default_priolist.
> 
> Signed-off-by: Michał Winiarski <michal.winiarski at intel.com>
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> Reviewed-by: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>

Merged the first couple of patches (not the inheritance) to split out
unwind_incomplete_requests; as a refactor it can stand on its own.
-Chris