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 -- To unsubscribe from this list: send the line "unsubscribe cgroups" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html