From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx156.postini.com [74.125.245.156]) by kanga.kvack.org (Postfix) with SMTP id 774DD6B005D for ; Thu, 31 May 2012 02:17:54 -0400 (EDT) Received: by dakp5 with SMTP id p5so1003358dak.14 for ; Wed, 30 May 2012 23:17:53 -0700 (PDT) Date: Wed, 30 May 2012 23:17:51 -0700 (PDT) From: David Rientjes Subject: Re: [PATCH] meminfo: show /proc/meminfo base on container's memcg In-Reply-To: <4FC70355.70805@jp.fujitsu.com> Message-ID: References: <1338260214-21919-1-git-send-email-gaofeng@cn.fujitsu.com> <4FC6B68C.2070703@jp.fujitsu.com> <4FC6BC3E.5010807@jp.fujitsu.com> <4FC6C111.2060108@jp.fujitsu.com> <4FC6D881.4090706@jp.fujitsu.com> <4FC70355.70805@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org List-ID: To: Kamezawa Hiroyuki Cc: KOSAKI Motohiro , Gao feng , 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 On Thu, 31 May 2012, Kamezawa Hiroyuki wrote: > > The bottomline is that /proc/meminfo is one of many global resource state > > interfaces and doesn't imply that every thread has access to the full > > resources. It never has. It's very simple for another thread to consume > > a large amount of memory as soon as your read() of /proc/meminfo completes > > and then that information is completely bogus. > > Why you need to discuss this here ? We know all information are snapshot. > MemTotal is usually assumed to be static from /proc/meminfo and could now change radically without notification to the application. > Hmm....maybe need to mount cgroup in the container (again) and get an access > to cgroup > hierarchy and find the cgroup it belongs to......if it's allowed. An application should always know the cgroup that its attached to and be able to read its state using the command that I gave earlier. -- 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