From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kamezawa Hiroyuki Subject: Re: [PATCH] meminfo: show /proc/meminfo base on container's memcg Date: Thu, 31 May 2012 09:08:44 +0900 Message-ID: <4FC6B68C.2070703@jp.fujitsu.com> References: <1338260214-21919-1-git-send-email-gaofeng@cn.fujitsu.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: 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: David Rientjes Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, mhocko-AlSwsSmVLrQ@public.gmane.org, linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org, hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org, cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org, containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org List-Id: containers.vger.kernel.org (2012/05/31 6:38), David Rientjes wrote: > On Tue, 29 May 2012, Gao feng wrote: > >> cgroup and namespaces are used for creating containers but some of >> information is not isolated/virtualized. This patch is for isolating /proc/meminfo >> information per container, which uses memory cgroup. By this, top,free >> and other tools under container can work as expected(show container's >> usage) without changes. >> >> This patch is a trial to show memcg's info in /proc/meminfo if 'current' >> is under a memcg other than root. >> >> we show /proc/meminfo base on container's memory cgroup. >> because there are lots of info can't be provide by memcg, and >> the cmds such as top, free just use some entries of /proc/meminfo, >> we replace those entries by memory cgroup. >> >> if container has no memcg, we will show host's /proc/meminfo >> as before. >> >> there is no idea how to deal with Buffers,I just set it zero, >> It's strange if Buffers bigger than MemTotal. >> >> Signed-off-by: Gao feng > > Nack, this type of thing was initially tried with cpusets when a thread > was bound to a subset of nodes, i.e. only show the total amount of memory > spanned by those nodes. > Hmm. How about having memory.meminfo under memory cgroup directory and use it with bind mount ? (container tools will be able to help it.) Then, container applications(top,free,etc..) can read the values they wants. If admins don't want it, they'll not use bind mount. Thanks, -Kame