linux-kernel - Re: -mm merge plans for 2.6.26 (memcgroup)

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Message-ID: <Pine.LNX.4.64.0804211301500.20183@blonde.site>
Date:	Mon, 21 Apr 2008 13:13:38 +0100 (BST)
From:	Hugh Dickins <hugh@...itas.com>
To:	Andi Kleen <andi@...stfloor.org>
cc:	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	menage@...gle.com, xemul@...nvz.org, shiwh@...fujitsu.com,
	mel@....ul.ie, linux-kernel@...r.kernel.org
Subject: Re: -mm merge plans for 2.6.26 (memcgroup)

On Mon, 21 Apr 2008, Andi Kleen wrote:
> Hugh Dickins wrote:
> > On Mon, 21 Apr 2008, Balbir Singh wrote:
> > I've added Andi to the Cc's, I don't want to sneak away something
> > he's expecting there.  If 2.6.25 had gone out with a convention that
> > controller infrastructure gets compiled in, but has then to be enabled
> > at boottime or runtime, okay; 
> 
> That is what I have been expecting yes.
> 
> If later the slow down is fixed it can be also enabled by default too.

It is disabled by default, in the config; and Paul/Balbir already
provided the cgroup_disable=memory bootoption to override that.

Is it wise to add an additional hurdle now that 2.6.25 has gone out?
Is it wise to switch it around in future?  Seems a source of confusion
to me (I already wasted time testing the same things twice in -mm
because of this).

I guess Andrew needs to make an executive decision!
Whichever way round, we ought to clarify the config helptext.

Hugh
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