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mm: list_lru: disable memcg_aware when cgroup.memory is set to "nokmem"

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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".

Link: https://lkml.kernel.org/r/20231228062715.338672-1-haifeng.xu@shopee.com
Signed-off-by: Haifeng Xu <haifeng.xu@shopee.com>
Acked-by: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Shakeel Butt <shakeelb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Haifeng Xu 2023-12-28 06:27:14 +00:00 committed by Andrew Morton
parent 21fff064a2
commit 0057db47f8
1 changed files with 3 additions and 0 deletions
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3
mm/list_lru.c
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@ -567,6 +567,9 @@ 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);