1 files changed, 1 insertions, 47 deletions

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 874704c4a48a..c713867e496d 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -399,8 +399,6 @@ void memcg_put_cache_ids(void)
  */
 DEFINE_STATIC_KEY_FALSE(memcg_kmem_enabled_key);
 EXPORT_SYMBOL(memcg_kmem_enabled_key);
-
-struct workqueue_struct *memcg_kmem_cache_wq;
 #endif
 
 static int memcg_shrinker_map_size;
@@ -2902,39 +2900,6 @@ static void memcg_free_cache_id(int id)
 	ida_simple_remove(&memcg_cache_ida, id);
 }
 
-struct memcg_kmem_cache_create_work {
-	struct kmem_cache *cachep;
-	struct work_struct work;
-};
-
-static void memcg_kmem_cache_create_func(struct work_struct *w)
-{
-	struct memcg_kmem_cache_create_work *cw =
-		container_of(w, struct memcg_kmem_cache_create_work, work);
-	struct kmem_cache *cachep = cw->cachep;
-
-	memcg_create_kmem_cache(cachep);
-
-	kfree(cw);
-}
-
-/*
- * Enqueue the creation of a per-memcg kmem_cache.
- */
-static void memcg_schedule_kmem_cache_create(struct kmem_cache *cachep)
-{
-	struct memcg_kmem_cache_create_work *cw;
-
-	cw = kmalloc(sizeof(*cw), GFP_NOWAIT | __GFP_NOWARN);
-	if (!cw)
-		return;
-
-	cw->cachep = cachep;
-	INIT_WORK(&cw->work, memcg_kmem_cache_create_func);
-
-	queue_work(memcg_kmem_cache_wq, &cw->work);
-}
-
 /**
  * memcg_kmem_get_cache: select memcg or root cache for allocation
  * @cachep: the original global kmem cache
@@ -2951,7 +2916,7 @@ struct kmem_cache *memcg_kmem_get_cache(struct kmem_cache *cachep)
 
 	memcg_cachep = READ_ONCE(cachep->memcg_params.memcg_cache);
 	if (unlikely(!memcg_cachep)) {
-		memcg_schedule_kmem_cache_create(cachep);
+		queue_work(system_wq, &cachep->memcg_params.work);
 		return cachep;
 	}
 
@@ -7022,17 +6987,6 @@ static int __init mem_cgroup_init(void)
 {
 	int cpu, node;
 
-#ifdef CONFIG_MEMCG_KMEM
-	/*
-	 * Kmem cache creation is mostly done with the slab_mutex held,
-	 * so use a workqueue with limited concurrency to avoid stalling
-	 * all worker threads in case lots of cgroups are created and
-	 * destroyed simultaneously.
-	 */
-	memcg_kmem_cache_wq = alloc_workqueue("memcg_kmem_cache", 0, 1);
-	BUG_ON(!memcg_kmem_cache_wq);
-#endif
-
 	cpuhp_setup_state_nocalls(CPUHP_MM_MEMCQ_DEAD, "mm/memctrl:dead", NULL,
 				  memcg_hotplug_cpu_dead);