From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: [Ksummit-2010-discuss] checkpoint-restart: naked patch Date: Fri, 19 Nov 2010 17:10:26 +0100 Message-ID: <4CE6A172.7010603@kernel.org> References: <20101104164401.GC10656@sundance.ccs.neu.edu> <4CD3CE29.2010105@kernel.org> <20101106053204.GB12449@count0.beaverton.ibm.com> <20101106204008.GA31077@sundance.ccs.neu.edu> <4CD5D99A.8000402@cs.columbia.edu> <20101107184927.GF31077@sundance.ccs.neu.edu> <4CD72150.9070705@cs.columbia.edu> <4CE3C334.9080401@kernel.org> <20101117153902.GA1155@hallyn.com> <4CE3F8D1.10003@kernel.org> <20101119041045.GC24031@hallyn.com> <4CE683E1.6010500@kernel.org> <04F4899E-B5C7-4BAF-8F2F-05D507A91408@parallels.com> <4CE698C5.5060806@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org To: Alexey Dobriyan Cc: Kirill Korotaev , Serge Hallyn , Kapil Arya , Gene Cooperman , "linux-kernel@vger.kernel.org" , Pavel Emelianov , "Eric W. Biederman" , Linux Containers List-Id: containers.vger.kernel.org On 11/19/2010 05:01 PM, Alexey Dobriyan wrote: > On Fri, Nov 19, 2010 at 6:00 PM, Alexey Dobriyan wrote: >>>> - setting different statistics counters (like netdev stats etc.) >>>> and so on... >>> >>> Why would this matter? >> >> Because you'll introduce million stupid interfaces not interesting to >> anyone but C/R. > > Just like CLONE_SET_PID. Well, if you ask me, having pidns w/o a way to reinstate PID from userland is pretty silly and you and I might not know yet but it's quite imaginable that there will be other use cases for the capability unlike in-kernel CR. Kernel provides building blocks not the whole frigging package and for very good reasons. -- tejun