[Intel-gfx] Limit busywaiting

[Jens Axboe]

On 11/18/2015 02:56 AM, Chris Wilson wrote:
> This should filter out all explicit wait requests from userspace and
> only apply busywaiting to circumstances where we are forced to drain the
> GPU of old requests. With the 2 microsecond timeout from before, this
> still seems to preserve the speed up in stress tests and cancel the
> busywaiting for desktop loads.

Chris,

I tested these 3 on top of the previous 2us limit patch, and it seems to 
work fine. You can add:

Tested-by: Jens Axboe <axboe at fb.com>

to them, if you'd like.

-- 
Jens Axboe