drm/ttm: Add a bo list reserve fastpath (v2)
Makes it possible to reserve a list of buffer objects with a single
spin lock / unlock if there is no contention.
Should improve cpu usage on SMP kernels.
v2: Initialize private list members on reserve and don't call
ttm_bo_list_ref_sub() with zero put_count.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/include/drm/ttm/ttm_execbuf_util.h b/include/drm/ttm/ttm_execbuf_util.h
index cd2c475..fd09b84 100644
--- a/include/drm/ttm/ttm_execbuf_util.h
+++ b/include/drm/ttm/ttm_execbuf_util.h
@@ -41,7 +41,9 @@
* @bo: refcounted buffer object pointer.
* @new_sync_obj_arg: New sync_obj_arg for @bo, to be used once
* adding a new sync object.
- * @reservied: Indicates whether @bo has been reserved for validation.
+ * @reserved: Indicates whether @bo has been reserved for validation.
+ * @removed: Indicates whether @bo has been removed from lru lists.
+ * @put_count: Number of outstanding references on bo::list_kref.
*/
struct ttm_validate_buffer {
@@ -49,6 +51,8 @@
struct ttm_buffer_object *bo;
void *new_sync_obj_arg;
bool reserved;
+ bool removed;
+ int put_count;
};
/**