From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx140.postini.com [74.125.245.140]) by kanga.kvack.org (Postfix) with SMTP id 4AD8A6B005D for ; Thu, 31 May 2012 04:59:08 -0400 (EDT) Message-ID: <4FC73252.1000106@parallels.com> Date: Thu, 31 May 2012 12:56:50 +0400 From: Glauber Costa MIME-Version: 1.0 Subject: Re: [PATCH] meminfo: show /proc/meminfo base on container's memcg References: <1338260214-21919-1-git-send-email-gaofeng@cn.fujitsu.com> <4FC6BC3E.5010807@jp.fujitsu.com> <4FC6C111.2060108@jp.fujitsu.com> <4FC6D881.4090706@jp.fujitsu.com> <4FC70355.70805@jp.fujitsu.com> <4FC70E5E.1010003@gmail.com> <4FC711A5.4090003@gmail.com> <4FC720EE.3010307@gmail.com> <4FC724B1.70508@cn.fujitsu.com> <4FC72CA4.6080708@parallels.com> <4FC73203.2070009@cn.fujitsu.com> In-Reply-To: <4FC73203.2070009@cn.fujitsu.com> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Gao feng Cc: KOSAKI Motohiro , David Rientjes , Kamezawa Hiroyuki , hannes@cmpxchg.org, mhocko@suse.cz, bsingharora@gmail.com, akpm@linux-foundation.org, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, linux-mm@kvack.org, containers@lists.linux-foundation.org >>> >> >> One think to keep in mind: A file in memcg does not need to follow the same format of /proc/meminfo so we can bind mount. We should be able to reconstruct that in userspace based on information >> available from the kernel. You can even collect that from multiple locations, and *then* you bind mount. >> >> It helps to keep the churn out of the kernel, and in case of meminfo, you might need no extra kernel patches at all. And in the case of other files like /proc/stat, the relevant information comes from >> more than one cgroup anyway, so there is not too much way around it. > > I got it,thank you very much,indeed we need no extra kernel patch at all. > Maybe we should do this work in lxc or libvirt. > > thanks Glauber! > lxc has a fuse overlay for /proc already. I can't tell you about the state of that, because I haven't looked at it in details yet. I need to do something a lot similar for /proc/stat, but that is currently down in my prio queue. But it seems to be the way to go. My only concern is whether or not it is usable outside of lxc. Other Container solutions like OpenVZ would benefit from this a lot. -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org