Concentrating this discussion on a very big misunderstanding first.
Am 06.02.23 um 14:27 schrieb Danilo Krummrich:
[SNIP]
My understanding is that userspace is fully responsible on the parts
of the GPU VA space it owns. This means that userspace needs to take
care to *not* ask the kernel to modify mappings that are in use currently.
This is a completely wrong assumption! Take a look at what games like
Forza Horizzon are doing.
Basically that game allocates a very big sparse area and fills it with
pages from BOs while shaders are accessing it. And yes, as far as I know
this is completely valid behavior.
So you need to be able to handle this case anyway and the approach with
the regions won't help you at all preventing that.
Regards,
Christian.
