[PATCH 01/61] drm/i915: Do not share hwsp across contexts any more, v5.1

[Chris Wilson]

Quoting Maarten Lankhorst (2020-10-23 08:27:54)
> Instead of sharing pages with breadcrumbs, give each timeline a
> single page. This allows unrelated timelines not to share locks
> any more during command submission.
> 
> As an additional benefit, seqno wraparound no longer requires
> i915_vma_pin, which means we no longer need to worry about a
> potential -EDEADLK at a point where we are ready to submit.

Nacked-by: Chris Wilson <chris at chris-wilson.co.uk>
-Chris