On Tue, Mar 20, 2018 at 4:16 PM, Christian König <christian.koenig@amd.com>
wrote:

> That's what I meant with use up the otherwise unused VRAM. I don't see any
> disadvantage of always setting GTT as second domain on APUs.
>
> My assumption was that we dropped this in userspace for displayable
> surfaces, but Marek proved that wrong.
>
> So what we should do is actually to add GTT as fallback to all BOs on APUs
> in Mesa and only make sure that the kernel is capable of handling GTT with
> optimal performance (e.g. have user huge pages etc..).
>

VRAM|GTT is practically as good as GTT. VRAM with BO priorities and
eviction throttling is the true "VRAM|GTT".

I don't know how else to make use of VRAM intelligently.

Marek