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-rw-r--r--mm/memcontrol.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index e16694d5e118..3eafe6cf6ca4 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -341,6 +341,14 @@ struct mem_cgroup {
#if defined(CONFIG_MEMCG_KMEM) && defined(CONFIG_INET)
struct tcp_memcontrol tcp_mem;
#endif
+#if defined(CONFIG_MEMCG_KMEM)
+ /* analogous to slab_common's slab_caches list. per-memcg */
+ struct list_head memcg_slab_caches;
+ /* Not a spinlock, we can take a lot of time walking the list */
+ struct mutex slab_caches_mutex;
+ /* Index in the kmem_cache->memcg_params->memcg_caches array */
+ int kmemcg_id;
+#endif
};
/* internal only representation about the status of kmem accounting. */
@@ -2785,6 +2793,47 @@ static void memcg_uncharge_kmem(struct mem_cgroup *memcg, u64 size)
mem_cgroup_put(memcg);
}
+void memcg_cache_list_add(struct mem_cgroup *memcg, struct kmem_cache *cachep)
+{
+ if (!memcg)
+ return;
+
+ mutex_lock(&memcg->slab_caches_mutex);
+ list_add(&cachep->memcg_params->list, &memcg->memcg_slab_caches);
+ mutex_unlock(&memcg->slab_caches_mutex);
+}
+
+/*
+ * helper for acessing a memcg's index. It will be used as an index in the
+ * child cache array in kmem_cache, and also to derive its name. This function
+ * will return -1 when this is not a kmem-limited memcg.
+ */
+int memcg_cache_id(struct mem_cgroup *memcg)
+{
+ return memcg ? memcg->kmemcg_id : -1;
+}
+
+int memcg_register_cache(struct mem_cgroup *memcg, struct kmem_cache *s)
+{
+ size_t size = sizeof(struct memcg_cache_params);
+
+ if (!memcg_kmem_enabled())
+ return 0;
+
+ s->memcg_params = kzalloc(size, GFP_KERNEL);
+ if (!s->memcg_params)
+ return -ENOMEM;
+
+ if (memcg)
+ s->memcg_params->memcg = memcg;
+ return 0;
+}
+
+void memcg_release_cache(struct kmem_cache *s)
+{
+ kfree(s->memcg_params);
+}
+
/*
* We need to verify if the allocation against current->mm->owner's memcg is
* possible for the given order. But the page is not allocated yet, so we'll
@@ -5026,7 +5075,9 @@ static int mem_cgroup_oom_control_write(struct cgroup *cgrp,
#ifdef CONFIG_MEMCG_KMEM
static int memcg_init_kmem(struct mem_cgroup *memcg, struct cgroup_subsys *ss)
{
+ memcg->kmemcg_id = -1;
memcg_propagate_kmem(memcg);
+
return mem_cgroup_sockets_init(memcg, ss);
};