linux-kernel - Re: [PATCH] meminfo: show /proc/meminfo base on container's memcg

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Message-ID: <4FC73110.6010107@jp.fujitsu.com>
Date:	Thu, 31 May 2012 17:51:28 +0900
From:	Kamezawa Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Glauber Costa <glommer@...allels.com>
CC:	Gao feng <gaofeng@...fujitsu.com>,
	KOSAKI Motohiro <kosaki.motohiro@...il.com>,
	David Rientjes <rientjes@...gle.com>, hannes@...xchg.org,
	mhocko@...e.cz, bsingharora@...il.com, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org, cgroups@...r.kernel.org,
	linux-mm@...ck.org, containers@...ts.linux-foundation.org
Subject: Re: [PATCH] meminfo: show /proc/meminfo base on container's memcg

(2012/05/31 17:32), Glauber Costa wrote:
> On 05/31/2012 11:58 AM, Gao feng wrote:
>>> > It's one of a option. But, I seriously doubt fuse can make simpler than kamezawa-san's
>>> > idea. But yeah, I might NACK kamezawa-san's one if he will post ugly patch.
>>> >
>> It seams I should do some homework to make the implement beautifully.
>>
>> I think kamezawa-san's idea is more simpler.
>> thanks for your advice.
>>
>
> 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.

I'm sorry I couldn't fully understand. Could you explain more ?
Do you mean
  - bind mount memory cgroup directory into the container for exporting information
  - Some user-space apps, FUSE-procfs or some, can provide enough information

?
Thanks,
-Kame



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