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 15:28:17 -0700 Message-ID: <20120312222817.GI23255@google.com> References: <20120221211938.GE12236@google.com> <20120312221050.GG23255@google.com> <1331590938.18960.57.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: <1331590938.18960.57.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 Hey, On Mon, Mar 12, 2012 at 11:22:18PM +0100, Peter Zijlstra wrote: > On Mon, 2012-03-12 at 15:10 -0700, Tejun Heo wrote: > > > > * How to map controllers which aren't aware of full hierarchy is still > > an open question but I'm still standing by one active node on any > > root-to-leaf path w/ root group serving as the special rest group. > > What does this mean? Let's say we have a tree like the following. root / | \ G1 G2 G3 / \ G31 G32 So, for cgroups which don't support full hierarchy, it'll be viewed as either, root / | \ G1 G2 G3 or root / | | \ G1 G2 G31 G32 With root being treated specially, probably as just being a equal group as other groups, I'm not fully determined about that yet. Thanks. -- tejun