1 files changed, 28 insertions, 0 deletions

diff --git a/mm/slab_common.c b/mm/slab_common.c
index 3031badcc577..1c424b6511bf 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -81,6 +81,34 @@ static inline int kmem_cache_sanity_check(struct mem_cgroup *memcg,
 }
 #endif
 
+#ifdef CONFIG_MEMCG_KMEM
+int memcg_update_all_caches(int num_memcgs)
+{
+        struct kmem_cache *s;
+        int ret = 0;
+        mutex_lock(&slab_mutex);
+
+        list_for_each_entry(s, &slab_caches, list) {
+                if (!is_root_cache(s))
+                        continue;
+
+                ret = memcg_update_cache_size(s, num_memcgs);
+                /*
+                 * See comment in memcontrol.c, memcg_update_cache_size:
+                 * Instead of freeing the memory, we'll just leave the caches
+                 * up to this point in an updated state.
+                 */
+                if (ret)
+                        goto out;
+        }
+
+        memcg_update_array_size(num_memcgs);
+out:
+        mutex_unlock(&slab_mutex);
+        return ret;
+}
+#endif
+
 /*
  * Figure out what the alignment of the objects will be given a set of
  * flags, a user specified alignment and the size of the objects.