linux-kernel - Re: [v8 0/4] cgroup-aware OOM killer

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: <20171002203423.GA19849@cmpxchg.org>
Date:   Mon, 2 Oct 2017 16:34:23 -0400
From:   Johannes Weiner <hannes@...xchg.org>
To:     Shakeel Butt <shakeelb@...gle.com>
Cc:     Michal Hocko <mhocko@...nel.org>, Tim Hockin <thockin@...kin.org>,
        Roman Gushchin <guro@...com>, Tejun Heo <tj@...nel.org>,
        kernel-team@...com, David Rientjes <rientjes@...gle.com>,
        Linux MM <linux-mm@...ck.org>,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Cgroups <cgroups@...r.kernel.org>, linux-doc@...r.kernel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [v8 0/4] cgroup-aware OOM killer

On Mon, Oct 02, 2017 at 01:24:25PM -0700, Shakeel Butt wrote:
> On Mon, Oct 2, 2017 at 12:56 PM, Michal Hocko <mhocko@...nel.org> wrote:
> > On Mon 02-10-17 12:45:18, Shakeel Butt wrote:
> >> > I am sorry to cut the rest of your proposal because it simply goes over
> >> > the scope of the proposed solution while the usecase you are mentioning
> >> > is still possible. If we want to compare intermediate nodes (which seems
> >> > to be the case) then we can always provide a knob to opt-in - be it your
> >> > oom_gang or others.
> >>
> >> In the Roman's proposed solution we can already force the comparison
> >> of intermediate nodes using 'oom_group', I am just requesting to
> >> separate the killall semantics from it.
> >
> > oom_group _is_ about killall semantic.  And comparing killable entities
> > is just a natural thing to do. So I am not sure what you mean
> >
> 
> I am saying decouple the notion of comparable entities and killable entities.

Feel free to send patches in a new thread.

We don't need this level of control for this series to be useful - to
us, and other users. It can easily be added on top of Roman's work.