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-rw-r--r--mm/slab_common.c44
1 files changed, 43 insertions, 1 deletions
diff --git a/mm/slab_common.c b/mm/slab_common.c
index f206cb10a544..c2a8661f8b81 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -116,6 +116,38 @@ static inline int kmem_cache_sanity_check(const char *name, size_t size)
#endif
#ifdef CONFIG_MEMCG_KMEM
+static int memcg_alloc_cache_params(struct mem_cgroup *memcg,
+ struct kmem_cache *s, struct kmem_cache *root_cache)
+{
+ size_t size;
+
+ if (!memcg_kmem_enabled())
+ return 0;
+
+ if (!memcg) {
+ size = offsetof(struct memcg_cache_params, memcg_caches);
+ size += memcg_limited_groups_array_size * sizeof(void *);
+ } else
+ size = sizeof(struct memcg_cache_params);
+
+ s->memcg_params = kzalloc(size, GFP_KERNEL);
+ if (!s->memcg_params)
+ return -ENOMEM;
+
+ if (memcg) {
+ s->memcg_params->memcg = memcg;
+ s->memcg_params->root_cache = root_cache;
+ } else
+ s->memcg_params->is_root_cache = true;
+
+ return 0;
+}
+
+static void memcg_free_cache_params(struct kmem_cache *s)
+{
+ kfree(s->memcg_params);
+}
+
int memcg_update_all_caches(int num_memcgs)
{
struct kmem_cache *s;
@@ -141,7 +173,17 @@ out:
mutex_unlock(&slab_mutex);
return ret;
}
-#endif
+#else
+static inline int memcg_alloc_cache_params(struct mem_cgroup *memcg,
+ struct kmem_cache *s, struct kmem_cache *root_cache)
+{
+ return 0;
+}
+
+static inline void memcg_free_cache_params(struct kmem_cache *s)
+{
+}
+#endif /* CONFIG_MEMCG_KMEM */
/*
* Find a mergeable slab cache