[Intel-gfx] [PATCH 07/16] drm/i915: Trim struct_mutex hold duration for i915_gem_free_objects

[Joonas Lahtinen]

On ke, 2017-07-26 at 14:26 +0100, Chris Wilson wrote:
> We free objects in bulk after they wait for their RCU grace period.
> Currently, we take struct_mutex and unbind all the objects. This can lead
> to a long lock duration during which time those objects have their pages
> unfreeable (i.e. the shrinker is prevented from reaping those pages). If
> we only process a single object under the struct_mutex and then free the
> pages, the number of objects locked away from the shrinker is minimal
> and we allow regular clients better access to struct_mutex if they need
> it.
> 
> 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