linux-kernel - Re: [PATCH v3 4/4] mm: memcontrol: move PageMemcgKmem to the scope of CONFIG_MEMCG

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Message-ID: <CALvZod7CmOMedrv1RMO=ryEagf9yanoWA6o0RXZ0xhPhiE0JrA@mail.gmail.com>
Date:   Thu, 11 Mar 2021 19:26:30 -0800
From:   Shakeel Butt <shakeelb@...gle.com>
To:     Muchun Song <songmuchun@...edance.com>
Cc:     Roman Gushchin <guro@...com>, Johannes Weiner <hannes@...xchg.org>,
        Michal Hocko <mhocko@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux MM <linux-mm@...ck.org>,
        Xiongchun duan <duanxiongchun@...edance.com>
Subject: Re: [PATCH v3 4/4] mm: memcontrol: move PageMemcgKmem to the scope of CONFIG_MEMCG_KMEM

On Tue, Mar 9, 2021 at 2:09 AM Muchun Song <songmuchun@...edance.com> wrote:
>
> The page only can be marked as kmem when CONFIG_MEMCG_KMEM is enabled.
> So move PageMemcgKmem() to the scope of the CONFIG_MEMCG_KMEM.
>
> As a bonus, on !CONFIG_MEMCG_KMEM build some code can be compiled out.
>
> Signed-off-by: Muchun Song <songmuchun@...edance.com>

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