[Intel-gfx] [PATCH 2/2] drm/i915/gtt: disable 2M pages for pre-gen11

[Chris Wilson]

Quoting Matthew Auld (2019-08-09 20:34:56)
> We currently disable THP(Transparent-Huge-Pages) for our shmem objects
> due to a performance regression with read BW in some internal
> benchmarks. Given that this is our main source of 2M pages, there really
> isn't much point in enabling 2M GTT pages, especially this that comes at
> the cost of disabling the GTT cache. However from gen11 it looks like we
> should hopefully see the HW issue resolved. Given this opt for only
> enabling 2M GTT pages from gen11 onwards.
> 
> Signed-off-by: Matthew Auld <matthew.auld at intel.com>
> Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
> Cc: Chris Wilson <chris at chris-wilson.co.uk>

Gone, but not forgotten.

Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>

Now we just need some time on gen11...
-Chris