linux-kernel - Re: [PATCH 00/10] cgroups: Task counter subsystem v8

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Message-ID: <20130401202943.GC31435@htj.dyndns.org>
Date:	Mon, 1 Apr 2013 13:29:43 -0700
From:	Tejun Heo <tj@...nel.org>
To:	Tim Hockin <thockin@...kin.org>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Li Zefan <lizf@...fujitsu.com>,
	LKML <linux-kernel@...r.kernel.org>,
	"Kirill A. Shutemov" <kirill@...temov.name>,
	Paul Menage <paul@...lmenage.org>,
	Johannes Weiner <hannes@...xchg.org>,
	Aditya Kali <adityakali@...gle.com>,
	Oleg Nesterov <oleg@...hat.com>,
	Containers <containers@...ts.linux-foundation.org>,
	Glauber Costa <glommer@...il.com>,
	Cgroups <cgroups@...r.kernel.org>,
	Daniel J Walsh <dwalsh@...hat.com>,
	"Daniel P. Berrange" <berrange@...hat.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Max Kellermann <mk@...all.com>,
	Mandeep Singh Baines <msb@...omium.org>
Subject: Re: [PATCH 00/10] cgroups: Task counter subsystem v8

On Mon, Apr 01, 2013 at 01:09:09PM -0700, Tim Hockin wrote:
> Pardon my ignorance, but... what?  Use kernel memory limits as a proxy
> for process/thread counts?  That sounds terrible - I hope I am

Well, the argument was that process / thread counts were a poor and
unnecessary proxy for kernel memory consumption limit.  IIRC, Johannes
put it as (I'm paraphrasing) "you can't go to Fry's and buy 4k thread
worth of component".

> misunderstanding?  This task counter patch had several properties that
> mapped very well to what we want.
> 
> Is it dead in the water?

After some discussion, Frederic agreed that at least his use case can
be served well by kmemcg, maybe even better - IIRC it was container
fork bomb scenario, so you'll have to argue your way in why kmemcg
isn't a suitable solution for your use case if you wanna revive this.

Thanks.

-- 
tejun
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