On Fri, Jul 18, 2014 at 5:19 AM, Michel D?nzer <michel at daenzer.net> wrote: > On 17.07.2014 21:00, Marek Ol??k wrote: >> On Thu, Jul 17, 2014 at 12:01 PM, Michel D?nzer <michel at daenzer.net> >> wrote: >>> From: Michel D?nzer <michel.daenzer at amd.com> >>> >>> 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.
Yes, please drop the special treatment of persistent mappings. Thank you. Marek
