[Intel-gfx] [PATCH v2] drm/i915: Queue page flip work via a low latency, unbound workqueue

[Maarten Lankhorst]

Op 14-09-16 om 19:07 schreef Imre Deak:
> While user space has control over the scheduling priority of its page
> flipping thread, the corresponding work the driver schedules for MMIO
> flips always runs from the generic system workqueue which has some
> scheduling overhead due it being CPU bound. This would hinder an
> application that wants more stringent guarantees over flip timing (to
> avoid missing a flip at the next frame count).
>
> Fix this by scheduling the work from a dedicated, unbound workqueue
> which provides for minimal scheduling latency.
I think it should use the same wq as intel_atomic_commit, either page flip should use
system_unbound_wq, or atomic_commit should use this one.

~Maarten