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Commit 68c4fa31 authored by Thomas Hellstrom's avatar Thomas Hellstrom Committed by Dave Airlie
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drm/ttm: Optimize ttm_eu_backoff_reservation 



Avoid the ttm_bo_unreserve() spinlocks by calling
ttm_eu_backoff_reservation_locked under the lru spinlock.

Signed-off-by: default avatarThomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: default avatarJerome Glisse <j.glisse@gmail.com>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent 2357cbe5

drivers/gpu/drm/ttm/ttm_execbuf_util.c

+8 −7
Original line number Diff line number Diff line
@@ -101,15 +101,16 @@ static int ttm_eu_wait_unreserved_locked(struct list_head *list, 
void ttm_eu_backoff_reservation(struct list_head *list)

{

	struct ttm_validate_buffer *entry;

	struct ttm_bo_global *glob;



	list_for_each_entry(entry, list, head) {

		struct ttm_buffer_object *bo = entry->bo;

		if (!entry->reserved)

			continue;

	if (list_empty(list))

		return;



		entry->reserved = false;

		ttm_bo_unreserve(bo);

	}

	entry = list_first_entry(list, struct ttm_validate_buffer, head);

	glob = entry->bo->glob;

	spin_lock(&glob->lru_lock);

	ttm_eu_backoff_reservation_locked(list);

	spin_unlock(&glob->lru_lock);

}

EXPORT_SYMBOL(ttm_eu_backoff_reservation);