[Intel-gfx] [PATCH] drm/i915: Segregate memory domains in the GTT using coloring

[Daniel Vetter]

On Thu, Jul 26, 2012 at 11:49:32AM +0100, Chris Wilson wrote:
> Several functions of the GPU have the restriction that differing memory
> domains cannot be placed next to each other (as the GPU may prefetch
> beyond the end of one domain and hang as it crosses into the other
> domain). We use the facility of the drm_mm to mark ranges with a
> particular color that corresponds to the cache attributes of those pages
> in order to prevent allocating adjacent blocks of differing memory
> types.
> 
> v2: Rebase ontop of drm_mm coloring v2.
> v3: Fix rebinding existing gtt_space and add a verification routine.
> 
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Ok, history fixed. Can you please double-check that I haven't botched it?

/me hangs head in shame over not noticing that nothing assings anything to
obj->color ...
-- 
Daniel Vetter
Mail: daniel at ffwll.ch
Mobile: +41 (0)79 365 57 48