[RFC] Add DMA_RESV_USAGE flags

[Christian König]

Am 18.05.21 um 15:26 schrieb Daniel Stone:
> On Tue, 18 May 2021 at 13:49, Christian König
> <ckoenig.leichtzumerken at gmail.com> wrote:
>> Am 18.05.21 um 07:59 schrieb Daniel Vetter:
>>> First step in fixing that is (and frankly was since years) to fix the
>>> amdgpu CS so winsys can pass along a bunch of flags about which CS
>>> should actually set the exclusive fence, so that you stop oversyncing
>>> so badly. Ofc old userspace needs to keep oversyncing forever, no way
>>> to fix that.
>> Exactly that is what we don't want to do because the winsys has no idea
>> when to sync and when not to sync.
> Hey, we're typing that out as fast as we can ... it's just that you
> keep reinventing sync primitives faster than we can ship support for
> them :P

You can stop typing. We will even need that for backward compatibility.

But yeah, not reinventing sync_file support with drm_syncobj would have 
helped :)

Cheers,
Christian.