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-rw-r--r--mm/memcontrol.c21
1 files changed, 6 insertions, 15 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 0ed61e27d52..4f9a9c5a02e 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -2092,14 +2092,10 @@ static struct mem_cgroup *mem_cgroup_alloc(void)
* Removal of cgroup itself succeeds regardless of refs from swap.
*/
-static void mem_cgroup_free(struct mem_cgroup *mem)
+static void __mem_cgroup_free(struct mem_cgroup *mem)
{
int node;
- if (atomic_read(&mem->refcnt) > 0)
- return;
-
-
for_each_node_state(node, N_POSSIBLE)
free_mem_cgroup_per_zone_info(mem, node);
@@ -2116,11 +2112,8 @@ static void mem_cgroup_get(struct mem_cgroup *mem)
static void mem_cgroup_put(struct mem_cgroup *mem)
{
- if (atomic_dec_and_test(&mem->refcnt)) {
- if (!mem->obsolete)
- return;
- mem_cgroup_free(mem);
- }
+ if (atomic_dec_and_test(&mem->refcnt))
+ __mem_cgroup_free(mem);
}
@@ -2170,12 +2163,10 @@ mem_cgroup_create(struct cgroup_subsys *ss, struct cgroup *cont)
if (parent)
mem->swappiness = get_swappiness(parent);
-
+ atomic_set(&mem->refcnt, 1);
return &mem->css;
free_out:
- for_each_node_state(node, N_POSSIBLE)
- free_mem_cgroup_per_zone_info(mem, node);
- mem_cgroup_free(mem);
+ __mem_cgroup_free(mem);
return ERR_PTR(-ENOMEM);
}
@@ -2190,7 +2181,7 @@ static void mem_cgroup_pre_destroy(struct cgroup_subsys *ss,
static void mem_cgroup_destroy(struct cgroup_subsys *ss,
struct cgroup *cont)
{
- mem_cgroup_free(mem_cgroup_from_cont(cont));
+ mem_cgroup_put(mem_cgroup_from_cont(cont));
}
static int mem_cgroup_populate(struct cgroup_subsys *ss,