linux-kernel - Re: [PATCH v4 2/3] mm/memcg: Simplify mem_cgroup_get

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Message-ID: <CALvZod58vQ3hQAAwT8=7MO9-Xvnb=Fms37E0gW-qT746gS54uw@mail.gmail.com>
Date:   Mon, 14 Sep 2020 08:36:56 -0700
From:   Shakeel Butt <shakeelb@...gle.com>
To:     Waiman Long <longman@...hat.com>
Cc:     Johannes Weiner <hannes@...xchg.org>,
        Michal Hocko <mhocko@...nel.org>,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Tejun Heo <tj@...nel.org>, LKML <linux-kernel@...r.kernel.org>,
        Cgroups <cgroups@...r.kernel.org>, Linux MM <linux-mm@...ck.org>,
        Chris Down <chris@...isdown.name>,
        Roman Gushchin <guro@...com>,
        Yafang Shao <laoar.shao@...il.com>
Subject: Re: [PATCH v4 2/3] mm/memcg: Simplify mem_cgroup_get_max()

On Mon, Sep 14, 2020 at 8:09 AM Waiman Long <longman@...hat.com> wrote:
>
> The mem_cgroup_get_max() function used to get memory+swap max from
> both the v1 memsw and v2 memory+swap page counters & return the maximum
> of these 2 values. This is redundant and it is more efficient to just
> get either the v1 or the v2 values depending on which one is currently
> in use.
>
> Signed-off-by: Waiman Long <longman@...hat.com>

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