linux-kernel - Re: [PATCH 3/3] loop: Charge i/o to mem and blk cg

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Message-ID: <CACVXFVPR+OLtPc6G-PTHNm+ro6LpzcHxxuCoFTcWHb6fmyRbKQ@mail.gmail.com>
Date:   Tue, 6 Apr 2021 11:23:01 +0800
From:   Ming Lei <tom.leiming@...il.com>
To:     Dan Schatzberg <schatzberg.dan@...il.com>
Cc:     Jens Axboe <axboe@...nel.dk>, Tejun Heo <tj@...nel.org>,
        Zefan Li <lizefan.x@...edance.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...nel.org>,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        Hugh Dickins <hughd@...gle.com>,
        Shakeel Butt <shakeelb@...gle.com>,
        Roman Gushchin <guro@...com>,
        Muchun Song <songmuchun@...edance.com>,
        Yang Shi <shy828301@...il.com>,
        Alex Shi <alex.shi@...ux.alibaba.com>,
        Alexander Duyck <alexander.h.duyck@...ux.intel.com>,
        Wei Yang <richard.weiyang@...il.com>,
        "open list:BLOCK LAYER" <linux-block@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        "open list:CONTROL GROUP (CGROUP)" <cgroups@...r.kernel.org>,
        "open list:MEMORY MANAGEMENT" <linux-mm@...ck.org>
Subject: Re: [PATCH 3/3] loop: Charge i/o to mem and blk cg

On Sat, Apr 3, 2021 at 3:18 AM Dan Schatzberg <schatzberg.dan@...il.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@...il.com>
> Acked-by: Johannes Weiner <hannes@...xchg.org>

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

-- 
Ming Lei