[Intel-gfx] [PATCH 5/9] drm/i915/selftests: Exercise some AB...BA preemption chains

[Chris Wilson]

Quoting Chris Wilson (2019-01-29 17:02:03)
> Build a chain using 2 contexts (A, B) then request a preemption such
> that a later A request runs before the spinner in B.
> 
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Already,
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
-Chris