[Intel-gfx] [PATCH 1/3] drm/i915: Stop marking the unaccessible scratch page as UC

[Joonas Lahtinen]

On ma, 2016-08-22 at 08:44 +0100, Chris Wilson wrote:
> Since by design, if not entirely by practice, nothing is allowed to
> access the scratch page we use to background fill the VM, then we do not
> need to ensure that it is coherent between the CPU and GPU.
> set_pages_uc() does a stop_machine() after changing the PAT, and that
> significantly impacts upon context creation throughput.
> 
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

Reviewed-by: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>

Regards, Joonas
-- 
Joonas Lahtinen
Open Source Technology Center
Intel Corporation