linux-kernel - Re: [PATCH 07/18] mm: memcontrol: prepare move_account for removal of private page type counters

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Message-ID: <20200422064138.GG6780@js1304-desktop>
Date:   Wed, 22 Apr 2020 15:41:38 +0900
From:   Joonsoo Kim <js1304@...il.com>
To:     Johannes Weiner <hannes@...xchg.org>
Cc:     Alex Shi <alex.shi@...ux.alibaba.com>,
        Shakeel Butt <shakeelb@...gle.com>,
        Hugh Dickins <hughd@...gle.com>,
        Michal Hocko <mhocko@...e.com>,
        "Kirill A. Shutemov" <kirill@...temov.name>,
        Roman Gushchin <guro@...com>, linux-mm@...ck.org,
        cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-team@...com
Subject: Re: [PATCH 07/18] mm: memcontrol: prepare move_account for removal
 of private page type counters

On Mon, Apr 20, 2020 at 06:11:15PM -0400, Johannes Weiner wrote:
> When memcg uses the generic vmstat counters, it doesn't need to do
> anything at charging and uncharging time. It does, however, need to
> migrate counts when pages move to a different cgroup in move_account.
> 
> Prepare the move_account function for the arrival of NR_FILE_PAGES,
> NR_ANON_MAPPED, NR_ANON_THPS etc. by having a branch for files and a
> branch for anon, which can then divided into sub-branches.
> 
> Signed-off-by: Johannes Weiner <hannes@...xchg.org>

Reviewed-by: Joonsoo Kim <iamjoonsoo.kim@....com>