Actually, when using a boot time kernel option "cgroup.memory=nokmem", all lru items are inserted to list_lru_node. But for those users who invoke list_lru_init_memcg() to initialize list_lru, list_lru_memcg_aware() returns true. And this brings unneeded operations related to memcg. To make things more convenient, let's disable memcg_aware when cgroup.memory is set to "nokmem". Signed-off-by: Haifeng Xu <haifeng.xu@xxxxxxxxxx> --- mm/list_lru.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/mm/list_lru.c b/mm/list_lru.c index a05e5bef3b40..86f63c92fd88 100644 --- a/mm/list_lru.c +++ b/mm/list_lru.c @@ -566,6 +566,9 @@ int __list_lru_init(struct list_lru *lru, bool memcg_aware, lru->shrinker_id = shrinker->id; else lru->shrinker_id = -1; + + if (mem_cgroup_kmem_disabled()) + memcg_aware = false; #endif lru->node = kcalloc(nr_node_ids, sizeof(*lru->node), GFP_KERNEL); -- 2.25.1
