[PATCH v7 06/10] mm: don't check the dying flag on kmem_cache creation

[Roman Gushchin]

There is no point in checking the root_cache->memcg_params.dying
flag on kmem_cache creation path. New allocations shouldn't be
performed using a dead root kmem_cache, so no new memcg kmem_cache
creation can be scheduled after the flag is set. And if it was
scheduled before, flush_memcg_workqueue() will wait for it anyway.

So let's drop this check to simplify the code.

Signed-off-by: Roman Gushchin <guro@xxxxxx>
---
 mm/slab_common.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/slab_common.c b/mm/slab_common.c
index 5e7638f495d1..9383104651cd 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -640,7 +640,7 @@ void memcg_create_kmem_cache(struct mem_cgroup *memcg,
 	 * The memory cgroup could have been offlined while the cache
 	 * creation work was pending.
 	 */
-	if (memcg->kmem_state != KMEM_ONLINE || root_cache->memcg_params.dying)
+	if (memcg->kmem_state != KMEM_ONLINE)
 		goto out_unlock;
 
 	idx = memcg_cache_id(memcg);
-- 
2.21.0