[Intel-gfx] [PATCH] drm/i915: Honour O_NONBLOCK before throttling execbuf submissions

[Tvrtko Ursulin]

On 10/10/2019 14:58, Chris Wilson wrote:
> Quoting Chris Wilson (2019-10-10 14:48:49)
>> Check the user's flags on the struct file before deciding whether or not
>> to stall before submitting a request. This allows us to reasonably
>> cheaply honour O_NONBLOCK without checking at more critical phases
>> during request submission.
> 
> One might reasonably expect poll(POLLOUT) to be supported as well in
> this case :|

That doesn't kind of fit - mismatch between one fd and multiple 
contexts, no? Or you could signal POLLOUT on any, or on all have space. 
But that's taking it too far. :)

Regards,

Tvrtko

> Bring on ugpu.
> -Chris
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