From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: [RFD] cgroup: about multiple hierarchies Date: Mon, 12 Mar 2012 16:04:16 -0700 Message-ID: <20120312230416.GM23255@google.com> References: <20120221211938.GE12236@google.com> <20120312221050.GG23255@google.com> <1331590938.18960.57.camel@twins> <20120312222817.GI23255@google.com> <1331591568.18960.61.camel@twins> <20120312223944.GJ23255@google.com> <1331592241.18960.64.camel@twins> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <1331592241.18960.64.camel@twins> 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: Peter Zijlstra Cc: Michal Schmidt , Frederic Weisbecker , containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, Kay Sievers , linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Lennart Poettering , cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Andrew Morton , Vivek Goyal List-Id: containers.vger.kernel.org On Mon, Mar 12, 2012 at 11:44:01PM +0100, Peter Zijlstra wrote: > On Mon, 2012-03-12 at 15:39 -0700, Tejun Heo wrote: > > If we can get to the point where nesting is fully > > supported by every controller first, that would be awesome too. > > As long as that is the goal.. otherwise, I'd be overjoyed if I can rip > nesting support out of the cpu-controller.. that stuff is such a pain. > Then again, I don't think the container people like this proposal -- > they were the ones pushing for full hierarchy back when. Yeah, the great pain of full hierarchy support is one of the reasons why I keep thinking about supporting mapping to flat hierarchy. Full hierarchy could be too painful and not useful enough for some controllers. Then again, cpu and memcg already have it and according to Vivek blkcg also had a proposed implementation, so maybe it's okay. Let's see. Thanks. -- tejun