> I think it's fine. Platforms without write-combining should fall back to normal uncacheable mappings. This is fine for VRAM, because it can't be cacheable. But for GTT, we want to use cacheable mappings if write- > combining isn't available, because uncacheable mappings would be much slower. > -- > Earthling Michel Dänzer | http://www.amd.com > Libre software enthusiast | Mesa and X developer Thanks for your reply. Ok, but I can't find the code of fall back to normal uncacheable mappings. Is it a software behavior or hardware behavior ?
