[Intel-gfx] [PATCH 07/31] drm/i915/execlists: Direct submission of new requests (avoid tasklet/ksoftirqd)

[Chris Wilson]

Quoting Chris Wilson (2018-06-28 13:07:51)
> Quoting Tvrtko Ursulin (2018-06-28 12:56:56)
> > And tasklet kick from intel_enable_engine_stats, hm yep. But wouldn't 
> > taking the timeline lock around active state reconstruction solve that 
> > simpler?
> 
> Can you? We probably can. (That one was a very recent discovery and
> quick fix.)

The biggest issue being whether or not the same locking applies equally
to all submission backends. That's not yet true, but then again we don't
use stats everywhere. So whether or not that's an issue, I don't know,
but it's enough to make me want to punt changing the locking inside
intel_enable_engine_stats to a separate patch.
-Chris