linux-kernel - Re: [0/1] [patch -mm] Add containerstats (v3)

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Date:	Sat, 9 Jun 2007 01:02:02 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	"Paul Menage" <menage@...gle.com>
Cc:	"Balbir Singh" <balbir@...ux.vnet.ibm.com>,
	"Linux Containers" <containers@...ts.osdl.org>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	"Pavel Emelianov" <xemul@...nvz.org>
Subject: Re: [0/1] [patch -mm] Add containerstats (v3)

On Sat, 9 Jun 2007 00:09:55 -0700 "Paul Menage" <menage@...gle.com> wrote:

> On 6/8/07, Andrew Morton <akpm@...ux-foundation.org> wrote:
> > On Fri, 08 Jun 2007 23:43:46 +0530
> > Balbir Singh <balbir@...ux.vnet.ibm.com> wrote:
> >
> > > This patch implements per container statistics infrastructure and re-uses
> > > code from the taskstats interface.
> >
> > boggle.
> >
> > Symbol: CONTAINERS [=y]
> >   Selected by: CONTAINER_DEBUG || CPUSETS && SMP || CONTAINER_CPUACCT
> >
> > Paul, that's just bizarre.  How come it was done this way?
> 
> Containers on their own without any subsystems aren't hugely useful.
> So the plan was that any container subsystem would "select CONTAINERS"
> to cause the container framework to be built. I'm happy to change it
> to invert the dependencies if you'd prefer.
> 

- CONTAINER_DEBUG should depend on CONTAINERS

- the CPUSETS && SMP is weird and should be deleted, unless I'm missing
  something

- CONTAINERS should depend on CPUSETS

- That leaves CONTAINER_CPUACCT.  One _could_ `select' CONTAINERS if
  CONTAINER_CPUACCT but I suspect that'll screw up the above (select does
  odd things).  I think it's reasonable to have a CONTAINERS menu and under
  that, all the clients of it: CONTAINER_CPUACCT, CONTAINER_MEMORY_CONTROL,
  etc.


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