On 16/07/2020 09:47, Chris Wilson wrote:
Quoting Tvrtko Ursulin (2020-07-16 09:41:17)
Right I missed dma_fence_is_signaled calls i915_request_completed.
In this case the remaining question is do we care about wait ioctl
potentially returning before the hypothetical sync fence for the same
request is signaled? This seems like a slight change in user observable
behaviour.
You would not be able to observe the difference after wakeup in state
between a sync_file and busy_ioctl/wait_ioctl, as a query after wakeup
will see the same signaled bit. So the only possible difference is a
change in wakeup order; but process wakeup/execution order is definitely
not defined by us :)
Doh.. true, same vfunc..
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Regards,
Tvrtko
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