From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758024AbYDGMLw (ORCPT ); Mon, 7 Apr 2008 08:11:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755679AbYDGMLm (ORCPT ); Mon, 7 Apr 2008 08:11:42 -0400 Received: from one.firstfloor.org ([213.235.205.2]:49910 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753842AbYDGMLm (ORCPT ); Mon, 7 Apr 2008 08:11:42 -0400 Date: Mon, 7 Apr 2008 14:16:00 +0200 From: Andi Kleen To: Balbir Singh Cc: Andi Kleen , Andrew Morton , YAMAMOTO Takashi , Paul Menage , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Pavel Emelianov , hugh@veritas.com, KAMEZAWA Hiroyuki Subject: Re: [-mm] Disable the memory controller by default Message-ID: <20080407121600.GC16647@one.firstfloor.org> References: <20080407115137.24124.59692.sendpatchset@localhost.localdomain> <20080407120340.GB16647@one.firstfloor.org> <47FA0D85.201@linux.vnet.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <47FA0D85.201@linux.vnet.ibm.com> User-Agent: Mutt/1.4.2.1i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > The boot control options apply to all controllers and we want to allow > controllers to decide whether they should be turned on or off. Ok that's fine too (to have finer grained options), just those should be on/off too, not toggle. > documentation support in Documentation/kernel-parameters.txt, don't you think we > can expect this to work as the user intended? Even with documentation support semantics changes over releases are not nice. So "toggle" is bad, always have it absolute values. So if an user decides they want full cgroup support and stick in a option for .25 into their boot loader config they should always get full cgroup support in all future kernels. Similiar if someone decides they don't need it. -Andi