[Mesa-dev] [PATCH 4/7] i965: Add an end-of-pipe sync helper

[Chris Wilson]

Quoting Jason Ekstrand (2017-06-15 16:59:19)
> On Thu, Jun 15, 2017 at 4:11 AM, Chris Wilson <chris at chris-wilson.co.uk> wrote:
>     The kernel does have a LRI after a flush before signaling the batch is
>     complete. I don't see a need to add another...
> 
>     The question is whether this posting is required for GPU visibility of
>     results or just CPU? I suspect this is just for CPU in which case it
>     doesn't belong here at all, but before flagging rendering as ready for
>     async (i.e. not involving the kernel) inspection.
> 
> 
> The docs, if you choose to believe them, seem to indicate that this is needed
> for GPU visibility as well as CPU.

The kernel has LRI (for semaphore updates) not LRM, is that significant?
Took me long enough to notice the difference.
-Chris