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-rw-r--r--mm/memcontrol.c14
1 files changed, 9 insertions, 5 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 87a448dd9c10..c016e001c5b2 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1773,11 +1773,13 @@ int mem_cgroup_select_victim_node(struct mem_cgroup *memcg)
#endif
/*
- * A group is eligible for the soft limit reclaim if it is
- * a) is over its soft limit
+ * A group is eligible for the soft limit reclaim under the given root
+ * hierarchy if
+ * a) it is over its soft limit
* b) any parent up the hierarchy is over its soft limit
*/
-bool mem_cgroup_soft_reclaim_eligible(struct mem_cgroup *memcg)
+bool mem_cgroup_soft_reclaim_eligible(struct mem_cgroup *memcg,
+ struct mem_cgroup *root)
{
struct mem_cgroup *parent = memcg;
@@ -1785,12 +1787,14 @@ bool mem_cgroup_soft_reclaim_eligible(struct mem_cgroup *memcg)
return true;
/*
- * If any parent up the hierarchy is over its soft limit then we
- * have to obey and reclaim from this group as well.
+ * If any parent up to the root in the hierarchy is over its soft limit
+ * then we have to obey and reclaim from this group as well.
*/
while((parent = parent_mem_cgroup(parent))) {
if (res_counter_soft_limit_excess(&parent->res))
return true;
+ if (parent == root)
+ break;
}
return false;