Quoting Chris Wilson (2018-03-28 22:18:53)
> @@ -1221,7 +1287,7 @@ static void execlists_schedule(struct i915_request
> *request, int prio)
>
> if (prio > engine->execlists.queue_priority &&
> i915_sw_fence_done(_to_request(pt)->submit))
> -
Install a timer when trying to preempt on behalf of an important
context such that if the active context does not honour the preemption
request within the desired timeout, then we reset the GPU to allow the
important context to run.
v2: Install the timer on scheduling the preempt request; long
