Re: [PATCH mm v2 8/9] memcg: enable accounting for allocations in alloc_fair_sched_group

[Muchun Song]

On Sun, May 22, 2022 at 12:39 AM Vasily Averin <vvs@xxxxxxxxxx> wrote:
>
> Creating of each new cpu cgroup allocates two 512-bytes kernel objects
> per CPU. This is especially important for cgroups shared parent memory
> cgroup. In this scenario, on nodes with multiple processors, these
> allocations become one of the main memory consumers.
>
> Memory allocated during new cpu cgroup creation:
> common part:    ~11Kb   +  318 bytes percpu
> cpu cgroup:     ~2.5Kb  + 1036 bytes percpu
>
> Accounting for this memory helps to avoid misuse inside memcg-limited
> contianers.
>
> Signed-off-by: Vasily Averin <vvs@xxxxxxxxxx>

Reviewed-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>