From: Wanpeng Li <liwp@xxxxxxxxxxxxxxxxxx>
move_charge_at_immigrate feature is disabled by default. Charges
are moved only when you move mm->owner and it also add additional
overhead.
Signed-off-by: Wanpeng Li <liwp.linux@xxxxxxxxx>
---
mm/memcontrol.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index a9c3d01..795a00f 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -5316,7 +5316,7 @@ static int mem_cgroup_can_attach(struct cgroup *cgroup,
int ret = 0;
struct mem_cgroup *memcg = mem_cgroup_from_cont(cgroup);
- if (memcg->move_charge_at_immigrate) {
+ if (unlikely(memcg->move_charge_at_immigrate)) {
struct mm_struct *mm;
struct mem_cgroup *from = mem_cgroup_from_task(p);
--
1.7.9.5
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