linux-kernel - Re: [PATCH v7 04/10] memcg: enable accounting for fasync

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Message-ID: <CALvZod6H8atu5k3xhKf11SEMjyVjXMYFGWKBLsXStYhYs3FNCw@mail.gmail.com>
Date:   Tue, 27 Jul 2021 14:50:50 -0700
From:   Shakeel Butt <shakeelb@...gle.com>
To:     Vasily Averin <vvs@...tuozzo.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Cgroups <cgroups@...r.kernel.org>,
        Michal Hocko <mhocko@...nel.org>,
        Johannes Weiner <hannes@...xchg.org>,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        Roman Gushchin <guro@...com>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Jeff Layton <jlayton@...nel.org>,
        "J. Bruce Fields" <bfields@...ldses.org>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v7 04/10] memcg: enable accounting for fasync_cache

On Mon, Jul 26, 2021 at 10:33 PM Vasily Averin <vvs@...tuozzo.com> wrote:
>
> fasync_struct is used by almost all character device drivers to set up
> the fasync queue, and for regular files by the file lease code.
> This structure is quite small but long-living and it can be assigned
> for any open file.
>
> It makes sense to account for its allocations to restrict the host's
> memory consumption from inside the memcg-limited container.
>
> Signed-off-by: Vasily Averin <vvs@...tuozzo.com>

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