[PATCH 2/2] drm/i915: Mark bonded requests as non-preemptable

[Chris Wilson]

Quoting Tvrtko Ursulin (2020-05-20 14:24:13)
> From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> 
> Once bonded requests are executing in parallel it is at least sub-
> optimal to preempt one of them and could even lead to GPU hangs with
> media workloads.

Suboptimal for one client, but not for the other. GPU hang to
non-preemptible kernels waiting for its bond, or due to HW? Is this bad
userspace or bad HW?
-Chris