[Intel-gfx] [PATCH v2 2/2] drm/i915/bxt: Fix inadvertent CPU snooping due to incorrect MOCS config

[Chris Wilson]

On Tue, Apr 26, 2016 at 03:44:22PM +0300, Imre Deak wrote:
> Setting a write-back cache policy in the MOCS entry definition also
> implies snooping, which has a considerable overhead. This is
> unexpected for a few reasons:

If it is snooping, then I don't see why it is undesirable to have it
available in a mocs setting. If it is bogus and the bit is undefined,
then by all means remove it.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre