Re: [PATCH 1/2] mm: list_lru: disable memcg_aware when cgroup.memory is set to "nokmem"

[Roman Gushchin]

On Thu, Dec 28, 2023 at 06:27:14AM +0000, Haifeng Xu wrote:
> 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".

I guess it's not only more convenient, but also should save a bit of memory.
But _probably_ not enough to justify messing up with stable backports.
Do you have any data on memory savings?

> 
> Signed-off-by: Haifeng Xu <haifeng.xu@xxxxxxxxxx>

Acked-by: Roman Gushchin <roman.gushchin@xxxxxxxxx>

Thanks!