On 17.07.2014 21:00, Marek Olšák wrote: > On Thu, Jul 17, 2014 at 12:01 PM, Michel Dänzer <michel@xxxxxxxxxxx> wrote: >> From: Michel Dänzer <michel.daenzer@xxxxxxx> >> >> This is hopefully safe: The kernel makes sure writes to these mappings >> finish before the GPU might start reading from them, and the GPU caches >> are invalidated at the start of a command stream. >> > The resource flags actually tell you what you can do. If the COHERENT > flag is set, the mapping must be cached. Why is that required? As I explain above, we should satisfy the requirements of the ARB_buffer_storage extension AFAICT. As pointed out by you and Grigori in other posts, I should probably just drop the special treatment of persistent mappings though, so the placement and flags are derived from the buffer usage. -- Earthling Michel Dänzer | http://www.amd.com Libre software enthusiast | Mesa and X developer _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
