On Thu, Oct 19, 2017 at 11:52 AM, Christian Gmeiner
<christian.gmei...@gmail.com> wrote:
>>> + if ((usage & PIPE_TRANSFER_WRITE) &&
>>> + prsc->target == PIPE_BUFFER &&
>>> + !util_ranges_intersect(&rsc->valid_buffer_range,
>>> + box->x, box->x + box->width)) {
>>> + /* We are trying to write to a previously uninitialized range. No
>>> need
>>> + * to wait.
>>> + */
>>
>> This unbalances the cpu_prep/fini in the map/unmap path. This isn't
>> allowed and the kernel will start to reject this in the near future.
>>
>
> Good to know that the kernel will reject this behauvior in the near future.
Seems a good idea nevertheless, and very welcome after rework, I've
seen some cases of excessive flushing coming from here.
Wladimir
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