Messages in this thread | | | Date | Thu, 31 May 2012 09:33:02 +0900 | From | Kamezawa Hiroyuki <> | Subject | Re: [PATCH] meminfo: show /proc/meminfo base on container's memcg |
| |
(2012/05/31 9:22), KOSAKI Motohiro wrote: > On Wed, May 30, 2012 at 8:08 PM, Kamezawa Hiroyuki > <kamezawa.hiroyu@jp.fujitsu.com> wrote: >> (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<gaofeng@cn.fujitsu.com> >>> >>> >>> 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. > > +1. 50% users need namespace separation and others don't. We need a > selectability.
My test with sysfs node's meminfo seems to work...
[root@rx100-1 qqm]# mount --bind /sys/devices/system/node/node0/meminfo /proc/meminfo [root@rx100-1 qqm]# cat /proc/meminfo
Node 0 MemTotal: 8379636 kB Node 0 MemFree: 4050224 kB Node 0 MemUsed: 4329412 kB Node 0 Active: 3010876 kB Node 0 Inactive: 507480 kB Node 0 Active(anon): 2671920 kB Node 0 Inactive(anon): 111596 kB Node 0 Active(file): 338956 kB Node 0 Inactive(file): 395884 kB Node 0 Unevictable: 48316 kB Node 0 Mlocked: 11524 kB Node 0 Dirty: 8 kB Node 0 Writeback: 0 kB Node 0 FilePages: 744908 kB Node 0 Mapped: 20604 kB Node 0 AnonPages: 1344940 kB Node 0 Shmem: 1448 kB Node 0 KernelStack: 3528 kB Node 0 PageTables: 53840 kB Node 0 NFS_Unstable: 0 kB Node 0 Bounce: 0 kB Node 0 WritebackTmp: 0 kB Node 0 Slab: 184404 kB Node 0 SReclaimable: 131060 kB Node 0 SUnreclaim: 53344 kB Node 0 HugePages_Total: 0 Node 0 HugePages_Free: 0 Node 0 HugePages_Surp: 0
Thanks, -Kame
| |