drm/i915: Immediately discard any backing storage for uneeded objects
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index c69f1fa..62ba9c1 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -4110,6 +4110,11 @@
obj_priv->madv = args->madv;
args->retained = obj_priv->gtt_space != NULL;
+ /* if the object is no longer bound, discard its backing storage */
+ if (i915_gem_object_is_purgeable(obj_priv) &&
+ obj_priv->gtt_space == NULL)
+ i915_gem_object_truncate(obj);
+
drm_gem_object_unreference(obj);
mutex_unlock(&dev->struct_mutex);