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References: <20210402191638.3249835-1-schatzberg.dan@gmail.com> <20210402191638.3249835-4-schatzberg.dan@gmail.com>
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From:   Ming Lei <tom.leiming@gmail.com>
Date:   Tue, 6 Apr 2021 11:23:01 +0800
Message-ID: <CACVXFVPR+OLtPc6G-PTHNm+ro6LpzcHxxuCoFTcWHb6fmyRbKQ@mail.gmail.com>
Subject: Re: [PATCH 3/3] loop: Charge i/o to mem and blk cg
To:     Dan Schatzberg <schatzberg.dan@gmail.com>
Cc:     Jens Axboe <axboe@kernel.dk>, Tejun Heo <tj@kernel.org>,
        Zefan Li <lizefan.x@bytedance.com>,
        Johannes Weiner <hannes@cmpxchg.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Michal Hocko <mhocko@kernel.org>,
        Vladimir Davydov <vdavydov.dev@gmail.com>,
        Hugh Dickins <hughd@google.com>,
        Shakeel Butt <shakeelb@google.com>,
        Roman Gushchin <guro@fb.com>,
        Muchun Song <songmuchun@bytedance.com>,
        Yang Shi <shy828301@gmail.com>,
        Alex Shi <alex.shi@linux.alibaba.com>,
        Alexander Duyck <alexander.h.duyck@linux.intel.com>,
        Wei Yang <richard.weiyang@gmail.com>,
        "open list:BLOCK LAYER" <linux-block@vger.kernel.org>,
        open list <linux-kernel@vger.kernel.org>,
        "open list:CONTROL GROUP (CGROUP)" <cgroups@vger.kernel.org>,
        "open list:MEMORY MANAGEMENT" <linux-mm@kvack.org>
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On Sat, Apr 3, 2021 at 3:18 AM Dan Schatzberg <schatzberg.dan@gmail.com> wrote:
>
> The current code only associates with the existing blkcg when aio is
> used to access the backing file. This patch covers all types of i/o to
> the backing file and also associates the memcg so if the backing file is
> on tmpfs, memory is charged appropriately.
>
> This patch also exports cgroup_get_e_css and int_active_memcg so it
> can be used by the loop module.
>
> Signed-off-by: Dan Schatzberg <schatzberg.dan@gmail.com>
> Acked-by: Johannes Weiner <hannes@cmpxchg.org>

Reviewed-by: Ming Lei <ming.lei@redhat.com>

-- 
Ming Lei