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-rw-r--r--include/linux/memcontrol.h14
-rw-r--r--mm/memcontrol.c41
-rw-r--r--mm/slab_common.c44
3 files changed, 47 insertions, 52 deletions
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index e0752d204d9e..4d17242eeff7 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -440,10 +440,6 @@ void __memcg_kmem_uncharge_pages(struct page *page, int order);
int memcg_cache_id(struct mem_cgroup *memcg);
-int memcg_alloc_cache_params(struct mem_cgroup *memcg, struct kmem_cache *s,
- struct kmem_cache *root_cache);
-void memcg_free_cache_params(struct kmem_cache *s);
-
int memcg_update_cache_size(struct kmem_cache *s, int num_groups);
void memcg_update_array_size(int num_groups);
@@ -574,16 +570,6 @@ static inline int memcg_cache_id(struct mem_cgroup *memcg)
return -1;
}
-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)
-{
-}
-
static inline struct kmem_cache *
memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp)
{
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 28928ce9b07f..865e87c014d6 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -2984,43 +2984,6 @@ int memcg_update_cache_size(struct kmem_cache *s, int num_groups)
return 0;
}
-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;
- css_get(&memcg->css);
- } else
- s->memcg_params->is_root_cache = true;
-
- return 0;
-}
-
-void memcg_free_cache_params(struct kmem_cache *s)
-{
- if (!s->memcg_params)
- return;
- if (!s->memcg_params->is_root_cache)
- css_put(&s->memcg_params->memcg->css);
- kfree(s->memcg_params);
-}
-
static void memcg_register_cache(struct mem_cgroup *memcg,
struct kmem_cache *root_cache)
{
@@ -3051,6 +3014,7 @@ static void memcg_register_cache(struct mem_cgroup *memcg,
if (!cachep)
return;
+ css_get(&memcg->css);
list_add(&cachep->memcg_params->list, &memcg->memcg_slab_caches);
/*
@@ -3084,6 +3048,9 @@ static void memcg_unregister_cache(struct kmem_cache *cachep)
list_del(&cachep->memcg_params->list);
kmem_cache_destroy(cachep);
+
+ /* drop the reference taken in memcg_register_cache */
+ css_put(&memcg->css);
}
/*
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