linux-kernel - Re: [PATCH v2] mm/memcg: Remove obsolete memcg_free

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Date:   Tue, 5 Oct 2021 18:15:52 -0700
From:   Roman Gushchin <guro@...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>,
        Vlastimil Babka <vbabka@...e.cz>,
        <linux-kernel@...r.kernel.org>, <cgroups@...r.kernel.org>,
        <linux-mm@...ck.org>, Shakeel Butt <shakeelb@...gle.com>,
        Muchun Song <songmuchun@...edance.com>
Subject: Re: [PATCH v2] mm/memcg: Remove obsolete memcg_free_kmem()

On Tue, Oct 05, 2021 at 04:24:50PM -0400, Waiman Long wrote:
> Since commit d648bcc7fe65 ("mm: kmem: make memcg_kmem_enabled()
> irreversible"), the only thing memcg_free_kmem() does is to call
> memcg_offline_kmem() when the memcg is still online which can happen when
> online_css() fails due to -ENOMEM. However, the name memcg_free_kmem()
> is confusing and it is more clear and straight forward to call
> memcg_offline_kmem() directly from mem_cgroup_css_free().
> 
> Suggested-by: Roman Gushchin <guro@...com>
> Signed-off-by: Waiman Long <longman@...hat.com>

Reviewed-by: Roman Gushchin <guro@...com>

Thanks, Waiman!