linux-kernel - Re: [Lhms-devel] [patch00/05]: Containers(V2)- Introduction

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Date:	Thu, 21 Sep 2006 10:33:02 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	clameter@....com, lhms-devel@...ts.sourceforge.net,
	npiggin@...e.de, ckrm-tech@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org, pj@....com, rohitseth@...gle.com,
	devel@...nvz.org
Subject: Re: [Lhms-devel] [patch00/05]: Containers(V2)- Introduction


Self-response..

On Thu, 21 Sep 2006 09:51:00 +0900
KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> wrote:

> On Wed, 20 Sep 2006 16:31:22 -0700 (PDT)
> Christoph Lameter <clameter@....com> wrote:
> 
> > On Wed, 20 Sep 2006, Rohit Seth wrote:
> > 
> > > Absolutely.  Since these containers are not (hard) partitioning the
> > > memory in any way so it is easy to change the limits (effectively
> > > reducing and increasing the memory limits for tasks belonging to
> > > containers).  As you said, memory hot-un-plug is important and it is
> > > non-trivial amount of work.
> > 
> > Maybe the hotplug guys want to contribute to the discussion?
> > 
> Ah, I'm reading threads with interest.

I wonder it may not good to use pgdat for resource controlling.

For example

In following scenario,
==
(1). add <pid> > /mnt/configfs/containers/my_container/add_task
(2). <pid> does some work.
(3). echo <pid> > /mnt/configfs/containers/my_container/rm_task
(4). echo <pid> > /mnt/configfs/containers/my_container2/add_task
==
(if fake-pgdat/memory-hotplug is used)
The pages used by <pid> in (2) will be accounted in 'my_container' after (3).
Is this user's wrong use of system ?

-Kame

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