linux-kernel - Re: [PATCH 3/4] mm: workingset: add vmstat counter for shadow nodes

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Date:   Tue, 9 Oct 2018 15:04:01 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Johannes Weiner <hannes@...xchg.org>
Cc:     Rik van Riel <riel@...hat.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, kernel-team@...com
Subject: Re: [PATCH 3/4] mm: workingset: add vmstat counter for shadow nodes

On Tue,  9 Oct 2018 14:47:32 -0400 Johannes Weiner <hannes@...xchg.org> wrote:

> Make it easier to catch bugs in the shadow node shrinker by adding a
> counter for the shadow nodes in circulation.
> 
> Signed-off-by: Johannes Weiner <hannes@...xchg.org>
> ---
>  include/linux/mmzone.h |  1 +
>  mm/vmstat.c            |  1 +
>  mm/workingset.c        | 12 ++++++++++--
>  3 files changed, 12 insertions(+), 2 deletions(-)
> 
> diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
> index 4179e67add3d..d82e80d82aa6 100644
> --- a/include/linux/mmzone.h
> +++ b/include/linux/mmzone.h
> @@ -161,6 +161,7 @@ enum node_stat_item {
>  	NR_SLAB_UNRECLAIMABLE,
>  	NR_ISOLATED_ANON,	/* Temporary isolated pages from anon lru */
>  	NR_ISOLATED_FILE,	/* Temporary isolated pages from file lru */
> +	WORKINGSET_NODES,

Documentation/admin-guide/cgroup-v2.rst, please.  And please check for
any other missing items while in there?