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

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Message-ID: <YEu/7vqMnwfWmiB7@cmpxchg.org>
Date:   Fri, 12 Mar 2021 14:24:30 -0500
From:   Johannes Weiner <hannes@...xchg.org>
To:     Muchun Song <songmuchun@...edance.com>
Cc:     guro@...com, mhocko@...nel.org, akpm@...ux-foundation.org,
        shakeelb@...gle.com, vdavydov.dev@...il.com,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        duanxiongchun@...edance.com
Subject: Re: [PATCH v3 4/4] mm: memcontrol: move PageMemcgKmem to the scope
 of CONFIG_MEMCG_KMEM

On Tue, Mar 09, 2021 at 06:07:17PM +0800, Muchun Song 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>

Acked-by: Johannes Weiner <hannes@...xchg.org>