Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> writes: > Since preempt-to-busy, we may unsubmit a request while it is still on > the HW and completes asynchronously. That means it may be retired and in > the process destroy the virtual engine (as the user has closed their > context), but that engine may still be holding onto the unsubmitted > compelted request. Therefore we need to potentially cleanup the old completed. -Mika