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

[Johannes Weiner]

On Tue, Jun 23, 2020 at 11:45:13AM -0700, Roman Gushchin 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@xxxxxx>
> Acked-by: Dennis Zhou <dennis@xxxxxxxxxx>

Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>