Re: [PATCH v3 3/5] mm: memcg/percpu: per-memcg percpu memory statistics

Shakeel Butt
2020-06-24T01:36:08Z

On Tue, Jun 23, 2020 at 11:47 AM Roman Gushchin <guro@fb.com> wrote:
>
> Percpu memory can represent a noticeable chunk of the total memory
> consumption, especially on big machines with many CPUs. Let's track
> percpu memory usage for each memcg and display it in memory.stat.
>
> A percpu allocation is usually scattered over multiple pages (and nodes),
> and can be significantly smaller than a page. So let's add a byte-sized
> counter on the memcg level: MEMCG_PERCPU_B. Byte-sized vmstat infra
> created for slabs can be perfectly reused for percpu case.
>
> Signed-off-by: Roman Gushchin <guro@fb.com>
> Acked-by: Dennis Zhou <dennis@kernel.org>

Reviewed-by: Shakeel Butt <shakeelb@google.com>