From: Kaixu Xia <kaixuxia@xxxxxxxxxxx>
When the variables count and limit have the same value(count == limit),
the result of min(margin, limit - count) statement should be 0 and the
variable margin is set to 0. So in this case, the min() statement is not
necessary and we can directly set the variable margin to 0.
Signed-off-by: Kaixu Xia <kaixuxia@xxxxxxxxxxx>
---
mm/memcontrol.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 5beea03dd58a..fedc5afdc482 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1314,7 +1314,7 @@ static unsigned long mem_cgroup_margin(struct mem_cgroup *memcg)
if (do_memsw_account()) {
count = page_counter_read(&memcg->memsw);
limit = READ_ONCE(memcg->memsw.max);
- if (count <= limit)
+ if (count < limit)
margin = min(margin, limit - count);
else
margin = 0;
--
2.20.0
