[Mesa-dev] Fwd: [PATCH 5/6] st/mesa: implement blit-based ReadPixels

[Michel Dänzer]

On Mon, 2013-03-18 at 01:06 +0100, Marek Olšák wrote: 
> 
> ([rant]We should really have an unmappable portion of VRAM as a
> feature, because unmappable memory is cool: the memory can be
> reclaimed immediately after texture deletion even if the texture is
> busy, because the CPU can't access it, and thanks to that, ttm_bo_wait
> could be a no-op for all unmappable resources[/rant]).

FWIW, that doesn't require a separate unmappable domain but 'just' that
TTM allows more asynchronous GPU operations. Thomas had plans for that a
long time ago, don't know what happened to them.


-- 
Earthling Michel Dänzer           |                   http://www.amd.com
Libre software enthusiast         |          Debian, X and DRI developer