[PATCH v2 2/3] mm/slub: remove full list manipulation for non-debug slab

[Chengming Zhou <zhouchengming@bytedance.com>]

Since debug slab is processed by free_to_partial_list(), and only debug
slab which has SLAB_STORE_USER flag would care about the full list, we
can remove these unrelated full list manipulations from __slab_free().

Acked-by: Christoph Lameter (Ampere) <cl@linux.com>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
---
 mm/slub.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/mm/slub.c b/mm/slub.c
index fda402b2d649..5c6fbeef05a8 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -4188,7 +4188,6 @@ static void __slab_free(struct kmem_cache *s, struct slab *slab,
 	 * then add it.
 	 */
 	if (!kmem_cache_has_cpu_partial(s) && unlikely(!prior)) {
-		remove_full(s, n, slab);
 		add_partial(n, slab, DEACTIVATE_TO_TAIL);
 		stat(s, FREE_ADD_PARTIAL);
 	}
@@ -4202,9 +4201,6 @@ static void __slab_free(struct kmem_cache *s, struct slab *slab,
 		 */
 		remove_partial(n, slab);
 		stat(s, FREE_REMOVE_PARTIAL);
-	} else {
-		/* Slab must be on the full list */
-		remove_full(s, n, slab);
 	}
 
 	spin_unlock_irqrestore(&n->list_lock, flags);

-- 
b4 0.10.1