diff options
| -rw-r--r-- | mm/memcontrol.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 134e2106f467..6115b2bbd6ea 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1220,7 +1220,7 @@ struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *root, if (dead_count == iter->last_dead_count) { smp_rmb(); last_visited = iter->last_visited; - if (last_visited && + if (last_visited && last_visited != root && !css_tryget(&last_visited->css)) last_visited = NULL; } @@ -1229,7 +1229,7 @@ struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *root, memcg = __mem_cgroup_iter_next(root, last_visited); if (reclaim) { - if (last_visited) + if (last_visited && last_visited != root) css_put(&last_visited->css); iter->last_visited = memcg; |