linux-kernel - Re: [PATCH 0/3 RESEND] Per memcg lru

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAOUHufaX35Y6MfwKj_XUWXJwdC=9M=g1gXpQpQghBZ2fXrkEAw@mail.gmail.com>
Date:   Wed, 18 Oct 2023 10:33:28 -0600
From:   Yu Zhao <yuzhao@...gle.com>
To:     Huan Yang <link@...o.com>, "T.J. Mercier" <tjmercier@...gle.com>
Cc:     Jonathan Corbet <corbet@....net>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Johannes Weiner <hannes@...xchg.org>,
        Michal Hocko <mhocko@...nel.org>,
        Roman Gushchin <roman.gushchin@...ux.dev>,
        Shakeel Butt <shakeelb@...gle.com>,
        Muchun Song <muchun.song@...ux.dev>,
        Peter Xu <peterx@...hat.com>,
        David Hildenbrand <david@...hat.com>,
        "T.J. Alumbaugh" <talumbau@...gle.com>,
        Axel Rasmussen <axelrasmussen@...gle.com>,
        Ryan Roberts <ryan.roberts@....com>,
        Kefeng Wang <wangkefeng.wang@...wei.com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        "open list:DOCUMENTATION" <linux-doc@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        "open list:MEMORY MANAGEMENT" <linux-mm@...ck.org>,
        "open list:CONTROL GROUP - MEMORY RESOURCE CONTROLLER (MEMCG)" 
        <cgroups@...r.kernel.org>, opensource.kernel@...o.com
Subject: Re: [PATCH 0/3 RESEND] Per memcg lru_gen node stat

On Sun, Oct 8, 2023 at 8:57 PM Huan Yang <link@...o.com> wrote:
>
> On original global lru_gen node in debugfs, it can all show each memcg's
> lru gen info in "lru_gen" or "lru_gen_full", and can type cmd into lru_gen.
> But which show info contains all memcg's info, and cmd need to
> know memcg's id.
>
> This patchset add lru_gen node in per memcg, with this node, we can
> get lru_gen info in each memcg.
> Also, we can type cmd to control each memcg's lru_gen seq, but, this node
> don't support multi cmd, single memcg just process one cmd once time.

Adding TJ from the Android team. (The other TJ you CC'ed is from the
ChromeOS team.)

This series introduced a new ABI, which has to be maintained forever.
How exactly would it be used in *production*?

Android doesn't officially support memcgs. So I want to understand the
real-world use cases first.