linux-kernel - Re: [PATCH v2 0/4] memcg: Low-limit reclaim

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]

Date:	Wed, 4 Jun 2014 12:18:59 -0700 (PDT)
From:	Hugh Dickins <hughd@...gle.com>
To:	Johannes Weiner <hannes@...xchg.org>
cc:	Michal Hocko <mhocko@...e.cz>,
	Andrew Morton <akpm@...ux-foundation.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Greg Thelen <gthelen@...gle.com>,
	Michel Lespinasse <walken@...gle.com>,
	Tejun Heo <tj@...nel.org>, Hugh Dickins <hughd@...gle.com>,
	Roman Gushchin <klamm@...dex-team.ru>,
	LKML <linux-kernel@...r.kernel.org>, linux-mm@...ck.org,
	Rik van Riel <riel@...hat.com>
Subject: Re: [PATCH v2 0/4] memcg: Low-limit reclaim

On Wed, 4 Jun 2014, Johannes Weiner wrote:
> On Wed, Jun 04, 2014 at 04:46:58PM +0200, Michal Hocko wrote:
> > 
> > In the other email I have suggested to add a knob with the configurable
> > default. Would you be OK with that?
> 
> No, I want to agree on whether we need that fallback code or not.  I'm
> not interested in merging code that you can't convince anybody else is
> needed.

I for one would welcome such a knob as Michal is proposing.

I thought it was long ago agreed that the low limit was going to fallback
when it couldn't be satisfied.  But you seem implacably opposed to that
as default, and I can well believe that Google is so accustomed to OOMing
that it is more comfortable with OOMing as the default.  Okay.  But I
would expect there to be many who want the attempt towards isolation that
low limit offers, without a collapse to OOM at the first misjudgement.

Hugh
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/