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References: <20220111010302.8864-1-richard.weiyang@gmail.com> <20220111010302.8864-3-richard.weiyang@gmail.com>
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From:   Shakeel Butt <shakeelb@google.com>
Date:   Sun, 16 Jan 2022 11:54:24 -0800
Message-ID: <CALvZod52PWUhaFW1jOjJFd_Ef4pBrj7=q8MaBEAWMqawapxQ6Q@mail.gmail.com>
Subject: Re: [PATCH 3/4] mm/memcg: retrieve parent memcg from css.parent
To:     Wei Yang <richard.weiyang@gmail.com>
Cc:     Johannes Weiner <hannes@cmpxchg.org>,
        Michal Hocko <mhocko@kernel.org>,
        Vladimir Davydov <vdavydov.dev@gmail.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Roman Gushchin <guro@fb.com>, Vlastimil Babka <vbabka@suse.cz>,
        Matthew Wilcox <willy@infradead.org>,
        Muchun Song <songmuchun@bytedance.com>,
        Yang Shi <shy828301@gmail.com>,
        Suren Baghdasaryan <surenb@google.com>,
        LKML <linux-kernel@vger.kernel.org>,
        Cgroups <cgroups@vger.kernel.org>, Linux MM <linux-mm@kvack.org>
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On Mon, Jan 10, 2022 at 5:03 PM Wei Yang <richard.weiyang@gmail.com> wrote:
>
> The parent we get from page_counter is correct, while this is two
> different hierarchy.
>
> Let's retrieve the parent memcg from css.parent just like parent_cs(),
> blkcg_parent(), etc.
>
> Signed-off-by: Wei Yang <richard.weiyang@gmail.com>

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