[Intel-gfx] [PATCH] drm/i915: Bump priority of clean up work

[Chris Wilson]

Quoting Chris Wilson (2018-07-12 12:57:29)
> We require that we keep the list of outstanding work short so that we do
> not "leak" memory while pageflipping under stress. However that system
> stress may delay kernel workers virtually indefinitely, which incurs the
> pageflips stall and eventually hit a timeout waiting for the cleanup.
> 
> Try to combat CPU starvation of our short-lived cleanup workers by
> switching to a high priority workqueue.
> 
> Testcase: igt/kms_cursor_legacy/all-pipes-torture-move
> References: https://bugs.freedesktop.org/show_bug.cgi?id=107122
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
> ---
> Not sure if highpri is enough to combat our RT torture...

CI thinks it is.
-Chris