linux-kernel - Re: [RFD] Merge task counter into memcg

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Date:	Tue, 17 Apr 2012 13:52:20 -0300
From:	Glauber Costa <glommer@...allels.com>
To:	Tejun Heo <tj@...nel.org>
CC:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Hugh Dickins <hughd@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Daniel Walsh <dwalsh@...hat.com>,
	"Daniel P. Berrange" <berrange@...hat.com>,
	Li Zefan <lizf@...fujitsu.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Cgroups <cgroups@...r.kernel.org>,
	Containers <containers@...ts.linux-foundation.org>
Subject: Re: [RFD] Merge task counter into memcg


>> In short, I don't think it's better to have task-counting and fd-counting in memcg.
>> It's kmem, but it's more than that, I think.
>> Please provide subsys like ulimit.
>
> So, you think that while kmem would be enough to prevent fork-bombs,
> it would still make sense to limit in more traditional ways
> (ie. ulimit style object limits).  Hmmm....
>

I personally think this is namespaces business, not cgroups.
If you have a process namespace, an interface that works to limit the 
number of processes should keep working given the constraints you are 
given.

What doesn't make sense, is to create a *new* interface to limit 
something that doesn't really need to be limited, just because you
limited a similar resource before.


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