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-rw-r--r--mm/memcontrol.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 775b94b1b8bd..a8abf919c70a 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -181,7 +181,7 @@ struct mem_cgroup_threshold {
/* For threshold */
struct mem_cgroup_threshold_ary {
- /* An array index points to threshold just below usage. */
+ /* An array index points to threshold just below or equal to usage. */
int current_threshold;
/* Size of entries[] */
unsigned int size;
@@ -4280,7 +4280,7 @@ static void __mem_cgroup_threshold(struct mem_cgroup *memcg, bool swap)
usage = mem_cgroup_usage(memcg, swap);
/*
- * current_threshold points to threshold just below usage.
+ * current_threshold points to threshold just below or equal to usage.
* If it's not true, a threshold was crossed after last
* call of __mem_cgroup_threshold().
*/
@@ -4406,14 +4406,15 @@ static int mem_cgroup_usage_register_event(struct cgroup *cgrp,
/* Find current threshold */
new->current_threshold = -1;
for (i = 0; i < size; i++) {
- if (new->entries[i].threshold < usage) {
+ if (new->entries[i].threshold <= usage) {
/*
* new->current_threshold will not be used until
* rcu_assign_pointer(), so it's safe to increment
* it here.
*/
++new->current_threshold;
- }
+ } else
+ break;
}
/* Free old spare buffer and save old primary buffer as spare */
@@ -4482,7 +4483,7 @@ static void mem_cgroup_usage_unregister_event(struct cgroup *cgrp,
continue;
new->entries[j] = thresholds->primary->entries[i];
- if (new->entries[j].threshold < usage) {
+ if (new->entries[j].threshold <= usage) {
/*
* new->current_threshold will not be used
* until rcu_assign_pointer(), so it's safe to increment