Re: [PATCH] mm: memcontrol: separate {pgscan,pgsteal}_{kswapd,direct} items in memory.stat of cgroup v2

[Shakeel Butt]

On Fri, Jun 3, 2022 at 12:06 AM Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx> wrote:
>
[...]
>
> diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst
> index 176298f2f4de..0b9ca7e7df34 100644
> --- a/Documentation/admin-guide/cgroup-v2.rst
> +++ b/Documentation/admin-guide/cgroup-v2.rst
> @@ -1442,11 +1442,17 @@ PAGE_SIZE multiple when read back.
>           pgrefill (npn)
>                 Amount of scanned pages (in an active LRU list)
>
> -         pgscan (npn)
> -               Amount of scanned pages (in an inactive LRU list)
> +         pgscan_kswapd (npn)
> +               Amount of scanned pages by kswapd (in an inactive LRU list)
>
> -         pgsteal (npn)
> -               Amount of reclaimed pages
> +         pgscan_direct (npn)
> +               Amount of scanned pages directly  (in an inactive LRU list)
> +
> +         pgsteal_kswapd (npn)
> +               Amount of reclaimed pages by kswapd
> +
> +         pgsteal_direct (npn)
> +               Amount of reclaimed pages directly

No objection to adding new fields but removing 'pgsteal' and 'pgscan'
from the user visible API might break some applications.