[Intel-gfx] [PATCH 03/20] drm/i915/perf: Manually acquire engine-wakeref around use of kernel_context

[Chris Wilson]

Quoting Mika Kuoppala (2020-02-28 11:53:06)
> Chris Wilson <chris at chris-wilson.co.uk> writes:
> 
> > The engine->kernel_context is a special case for request emission. Since
> > it is used as the barrier within the engine's wakeref, we must acquire the
> > wakeref before submitting a request to the kernel_context.
> 
> I am a bit surprised that the kernel ctx is used in this capacity...

I am happy that you are surprised, and I hope you quickly forget and
return to your happy innocence. :)
-Chris