From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Wed, 4 Jun 2008 18:15:28 +0900 From: KAMEZAWA Hiroyuki Subject: Re: [RFC][PATCH 0/2] memcg: hierarchy support (v3) Message-Id: <20080604181528.f4c94743.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: <6599ad830806040159o648392a1l3dbd84d9c765a847@mail.gmail.com> References: <20080604135815.498eaf82.kamezawa.hiroyu@jp.fujitsu.com> <6599ad830806040159o648392a1l3dbd84d9c765a847@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Paul Menage Cc: "linux-mm@kvack.org" , LKML , "balbir@linux.vnet.ibm.com" , "xemul@openvz.org" , "yamamoto@valinux.co.jp" List-ID: On Wed, 4 Jun 2008 01:59:32 -0700 "Paul Menage" wrote: > Hi Kame, > > I like the idea of keeping the kernel simple, and moving more of the > intelligence to userspace. > thanks. > It may need the kernel to expose a bit more in the way of VM details, > such as memory pressure, OOM notifications, etc, but as long as > userspace can respond quickly to memory imbalance, it should work > fine. We're doing something a bit similar using cpusets and fake NUMA > at Google - the principle of juggling memory between cpusets is the > same, but the granularity is much worse :-) > yes, next problem is adding interfaces. but we have to investigate what is principal. > On Tue, Jun 3, 2008 at 9:58 PM, KAMEZAWA Hiroyuki > wrote: > > - supported hierarchy_model parameter. > > Now, no_hierarchy and hardwall_hierarchy is implemented. > > Should we try to support hierarchy and non-hierarchy cgroups in the > same tree? Maybe we should just enforce the restrictions that: > > - the hierarchy mode can't be changed on a cgroup if you have children > or any non-zero usage/limit > - a cgroup inherits its parent's hierarchy mode. > Ah, my patch does it (I think). explanation is bad. - mem cgroup's mode can be changed against ROOT node which has no children. - a child inherits parent's mode. Thanks, -Kame -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org