From mboxrd@z Thu Jan  1 00:00:00 1970
From: Pavel Emelyanov <xemul-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org>
Subject: Re: [PATCH 3/7] proc: Introduce the Children: line in
	/proc/<pid>/status
Date: Sat, 23 Jul 2011 12:51:46 +0400
Message-ID: <4E2A8BA2.1040408@parallels.com>
References: <4E204466.8010204@parallels.com> <4E2044C3.7050506@parallels.com>
	<20110721065436.GT3455@htj.dyndns.org>
	<4E2A8116.1040309@parallels.com>
	<20110723084110.GG21089@mtj.dyndns.org>
	<4E2A8A0E.5030208@parallels.com>
	<20110723085014.GI21089@mtj.dyndns.org>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Return-path: <containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org>
In-Reply-To: <20110723085014.GI21089-9pTldWuhBndy/B6EtB590w@public.gmane.org>
List-Unsubscribe: <https://lists.linux-foundation.org/mailman/listinfo/containers>,
	<mailto:containers-request-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org?subject=unsubscribe>
List-Archive: <http://lists.linux-foundation.org/pipermail/containers>
List-Post: <mailto:containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org>
List-Help: <mailto:containers-request-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org?subject=help>
List-Subscribe: <https://lists.linux-foundation.org/mailman/listinfo/containers>,
	<mailto:containers-request-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org?subject=subscribe>
Sender: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org
Errors-To: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org
To: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Glauber Costa <glommer-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org>, Cyrill Gorcunov <gorcunov-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, Nathan Lynch <ntl-e+AXbWqSrlAAvxtiuMwx3w@public.gmane.org>, Linux Containers <containers-qjLDD68F18O7TbgM5vRIOg@public.gmane.org>, Serge Hallyn <serue-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>, Daniel Lezcano <dlezcano-NmTC/0ZBporQT0dZR+AlfA@public.gmane.org>
List-Id: containers.vger.kernel.org

On 07/23/2011 12:50 PM, Tejun Heo wrote:
> On Sat, Jul 23, 2011 at 12:45:02PM +0400, Pavel Emelyanov wrote:
>> OK I see. Then my answer is - typically a container looks like an
>> init task with everybody else growing from that point. Having a
>> machine with 1000 of containers building the whole /proc tree in
>> memory to dump a single container would be MUCH more expensive that
>> having this small like in proc.
> 
> This isn't a major point, so let's leave it alone for now.  If it's
> necessary, adding it isn't a big deal; however, I think it would
> probably be better solved by per-ns procfs.  If walking /proc becomes
> a huge overhead, CR wouldn't be the only one suffering and it calls
> for a better solution.

OK.

> Thanks.
>