linux-kernel - Re: [PATCH v3 2/3] mm, memcg: inline mem_cgroup_{charge/uncharge} to improve disabled memcg config

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Date:   Sun, 18 Jul 2021 17:55:59 +0100
From:   Matthew Wilcox <willy@...radead.org>
To:     Suren Baghdasaryan <surenb@...gle.com>
Cc:     tj@...nel.org, hannes@...xchg.org, mhocko@...nel.org,
        vdavydov.dev@...il.com, akpm@...ux-foundation.org,
        shakeelb@...gle.com, guro@...com, songmuchun@...edance.com,
        shy828301@...il.com, alexs@...nel.org, richard.weiyang@...il.com,
        vbabka@...e.cz, axboe@...nel.dk, iamjoonsoo.kim@....com,
        david@...hat.com, apopple@...dia.com, minchan@...nel.org,
        linmiaohe@...wei.com, linux-kernel@...r.kernel.org,
        cgroups@...r.kernel.org, linux-mm@...ck.org,
        kernel-team@...roid.com
Subject: Re: [PATCH v3 2/3] mm, memcg: inline mem_cgroup_{charge/uncharge} to
 improve disabled memcg config

On Fri, Jul 09, 2021 at 05:36:25PM -0700, Suren Baghdasaryan wrote:
> @@ -6723,7 +6722,7 @@ static int __mem_cgroup_charge(struct page *page, struct mem_cgroup *memcg,
>  }
>  
>  /**
> - * mem_cgroup_charge - charge a newly allocated page to a cgroup
> + * __mem_cgroup_charge - charge a newly allocated page to a cgroup
>   * @page: page to charge
>   * @mm: mm context of the victim
>   * @gfp_mask: reclaim mode

This patch conflicts with the folio work, so I'm just rebasing the
folio patches on top of this, and I think this part of the patch is a
mistake.  We don't want to document the __mem_cgroup_charge() function.
That's an implementation detail.  This patch should instead have moved the
kernel-doc to memcontrol.h and continued to document mem_cgroup_charge().