[Bug 109830] CPU iowait higher when run the GPU multi decoding threads

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=109830

--- Comment #22 from Owen Zhang <owen.zhang at intel.com> ---
(In reply to Tvrtko Ursulin from comment #21)
> Why it can't work for 4.19? Or you mean doesn't work?
> 
> What are the iowait numbers in drm-tip and 4.19 with the schedule_timeout
> hack?

i changed the io_schedule_timeout to schedule_timeout in kernel 4.19, the
iowait also is 90%+.

but in drm-tip, the iowait number is around 60& in average. 

i will try to test on kernel 5.0 in the next.

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