From mboxrd@z Thu Jan 1 00:00:00 1970 From: Glauber Costa Subject: Re: [RFD] Merge task counter into memcg Date: Tue, 17 Apr 2012 13:52:20 -0300 Message-ID: <4F8D9FC4.3080800__6989.49027942053$1334681657$gmane$org@parallels.com> References: <4F862851.3040208@jp.fujitsu.com> <20120412113217.GB11455@somewhere.redhat.com> <4F86BFC6.2050400@parallels.com> <20120412123256.GI1787@cmpxchg.org> <4F86D4BD.1040305@parallels.com> <20120412153055.GL1787@cmpxchg.org> <20120412163825.GB13069@google.com> <20120412172309.GM1787@cmpxchg.org> <20120412174155.GC13069@google.com> <4F878480.60505@jp.fujitsu.com> <20120417154117.GE32402@google.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20120417154117.GE32402-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: Tejun Heo Cc: "Daniel P. Berrange" , Frederic Weisbecker , Containers , Daniel Walsh , Hugh Dickins , LKML , Johannes Weiner , Cgroups , Andrew Morton List-Id: containers.vger.kernel.org >> 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.