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-rw-r--r--include/linux/slub_def.h3
-rw-r--r--mm/slub.c26
2 files changed, 28 insertions, 1 deletions
diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h
index f56bfa9..f2f7398 100644
--- a/include/linux/slub_def.h
+++ b/include/linux/slub_def.h
@@ -87,6 +87,9 @@ struct kmem_cache {
#ifdef CONFIG_MEMCG_KMEM
struct memcg_cache_params *memcg_params;
int max_attr_size; /* for propagation, maximum size of a stored attr */
+#ifdef CONFIG_SYSFS
+ struct kset *memcg_kset;
+#endif
#endif
#ifdef CONFIG_NUMA
diff --git a/mm/slub.c b/mm/slub.c
index 33939e7..3508ede 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -5138,6 +5138,15 @@ static const struct kset_uevent_ops slab_uevent_ops = {
static struct kset *slab_kset;
+static inline struct kset *cache_kset(struct kmem_cache *s)
+{
+#ifdef CONFIG_MEMCG_KMEM
+ if (!is_root_cache(s))
+ return s->memcg_params->root_cache->memcg_kset;
+#endif
+ return slab_kset;
+}
+
#define ID_STR_LENGTH 64
/* Create a unique string id for a slab cache:
@@ -5203,7 +5212,7 @@ static int sysfs_slab_add(struct kmem_cache *s)
name = create_unique_id(s);
}
- s->kobj.kset = slab_kset;
+ s->kobj.kset = cache_kset(s);
err = kobject_init_and_add(&s->kobj, &slab_ktype, NULL, "%s", name);
if (err) {
kobject_put(&s->kobj);
@@ -5216,6 +5225,18 @@ static int sysfs_slab_add(struct kmem_cache *s)
kobject_put(&s->kobj);
return err;
}
+
+#ifdef CONFIG_MEMCG_KMEM
+ if (is_root_cache(s)) {
+ s->memcg_kset = kset_create_and_add("cgroup", NULL, &s->kobj);
+ if (!s->memcg_kset) {
+ kobject_del(&s->kobj);
+ kobject_put(&s->kobj);
+ return -ENOMEM;
+ }
+ }
+#endif
+
kobject_uevent(&s->kobj, KOBJ_ADD);
if (!unmergeable) {
/* Setup first alias */
@@ -5234,6 +5255,9 @@ static void sysfs_slab_remove(struct kmem_cache *s)
*/
return;
+#ifdef CONFIG_MEMCG_KMEM
+ kset_unregister(s->memcg_kset);
+#endif
kobject_uevent(&s->kobj, KOBJ_REMOVE);
kobject_del(&s->kobj);
kobject_put(&s->kobj);
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