pg.ddx.io  pgsql-hackers@postgresql.org mailing list archive  

help / color / mirror / Atom feed
From: Tom Lane <tgl@sss.pgh.pa.us>
To: Andres Freund <andres@2ndquadrant.com>
Cc: Robert Haas <robertmhaas@gmail.com>
Cc: Gurjeet Singh <gurjeet@singh.im>
Cc: Peter Eisentraut <peter_e@gmx.net>
Cc: PGSQL Hackers <pgsql-hackers@postgresql.org>
Subject: Re: /proc/self/oom_adj is deprecated in newer Linux kernels
Date: Tue, 10 Jun 2014 11:40:25 -0400
Message-ID: <31103.1402414825@sss.pgh.pa.us> (raw)
In-Reply-To: <20140610152419.GL8406@alap3.anarazel.de>
References: <1316355543.12186.9.camel@vanquo.pezone.net>
	<15953.1316362868@sss.pgh.pa.us>
	<1316420754.14001.3.camel@fsopti579.F-Secure.com>
	<16241.1316441883@sss.pgh.pa.us>
	<CABwTF4XDdYiBQXqj=CKrFXN7x2NiBbVnpHSJG6AVnMBLnLBmLA@mail.gmail.com>
	<28946.1402408948@sss.pgh.pa.us>
	<CA+Tgmoaps4ih-VEKvUgftqJ66_oSo-h9PpHi2_-wAzhVTYnzYw@mail.gmail.com>
	<30117.1402411876@sss.pgh.pa.us>
	<CA+TgmoZ2tDAVB5cLPt=UKHaogw+cfq6ZEis1yCTD_gsBWud9SA@mail.gmail.com>
	<30601.1402413283@sss.pgh.pa.us>
	<20140610152419.GL8406@alap3.anarazel.de>
List-Unsubscribe: <mailto:majordomo@postgresql.org?body=unsub%20pgsql-hackers>

Andres Freund <andres@2ndquadrant.com> writes:
> On 2014-06-10 11:14:43 -0400, Tom Lane wrote:
>> Because it would convert the intended behavior (postmaster and only
>> postmaster is exempt from OOM kill) into a situation where possibly
>> all of the database processes are exempt from OOM kill, at the whim
>> of somebody who should not have the privilege to decide that.

> Meh^3. By that argument we need to forbid superusers to create any form
> of untrusted functions. Forbid anything that does malloc(), system(),
> fork(), whatever from a user's influence.

That's utter and complete nonsense.  We're discussing an operation that is
root-privileged (ie, lowering a process's OOM score), not random stuff
that unprivileged processes can do.

			regards, tom lane


-- 
Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-hackers



view thread (66+ messages)  latest in thread

Message-ID: <31103.1402414825@sss.pgh.pa.us>
Permalink:  ../31103.1402414825@sss.pgh.pa.us/
Also on:    postgresql.org/message-id/31103.1402414825@sss.pgh.pa.us

 · 

reply
Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Reply to all the recipients using the --to and --cc options:
  reply via email

  To: pgsql-hackers@postgresql.org
  Cc: tgl@sss.pgh.pa.us, andres@2ndquadrant.com, robertmhaas@gmail.com, gurjeet@singh.im, peter_e@gmx.net
  Subject: Re: /proc/self/oom_adj is deprecated in newer Linux kernels
  In-Reply-To: <31103.1402414825@sss.pgh.pa.us>

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox