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Date: Mon, 21 Apr 2008 08:48:30 -0700
From: "Paul Menage" <menage@google.com>
To: "Peter Zijlstra" <peterz@infradead.org>
Subject: Re: -mm merge plans for 2.6.26 (memcgroup)
Cc: balbir@linux.vnet.ibm.com, "Andrew Morton" <akpm@linux-foundation.org>,
       "KAMEZAWA Hiroyuki" <kamezawa.hiroyu@jp.fujitsu.com>, hugh@veritas.com,
       xemul@openvz.org, shiwh@cn.fujitsu.com, mel@csn.ul.ie,
       linux-kernel@vger.kernel.org
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On Mon, Apr 21, 2008 at 2:42 AM, Peter Zijlstra <peterz@infradead.org> wrote:
>  > This would enable the memory controller by default, it can be disabled
>  > using cgroup_disable=memory at boot time.
>
>  how about working on a runtime switch that only enables the whole
>  memcgroup machinery when an actual cgroup gets created - and disable it
>  again once the last cgroup goes.
>

Or more specifically, enable memory tracking when the mem controller
gets bound to a cgroup hierarchy, and disable it when the controller
is unbound.

Paul