From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753423Ab2AWUdS (ORCPT ); Mon, 23 Jan 2012 15:33:18 -0500 Received: from mail-iy0-f174.google.com ([209.85.210.174]:46171 "EHLO mail-iy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751109Ab2AWUdR (ORCPT ); Mon, 23 Jan 2012 15:33:17 -0500 Date: Mon, 23 Jan 2012 12:33:12 -0800 From: Tejun Heo To: Vivek Goyal Cc: axboe@kernel.dk, ctalbott@google.com, rni@google.com, linux-kernel@vger.kernel.org, Lennart Poettering Subject: Re: [PATCH 08/17] blkcg: shoot down blkio_groups on elevator switch Message-ID: <20120123203312.GL12652@google.com> References: <20120123155216.GF25986@redhat.com> <20120123155745.GD12652@google.com> <20120123161042.GG25986@redhat.com> <20120123161619.GE12652@google.com> <20120123162553.GI25986@redhat.com> <20120123171049.GH12652@google.com> <20120123182745.GK25986@redhat.com> <20120123184336.GI12652@google.com> <20120123193335.GK12652@google.com> <20120123195717.GM25986@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20120123195717.GM25986@redhat.com> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Jan 23, 2012 at 02:57:17PM -0500, Vivek Goyal wrote: > It would be good if you add one more part to your series (say part4) to > make it happen. We probably don't want to get into mess that from kernel > version A to B we had x behavior, from B to C we broke changed it to y > and in kernel version D we restored it back to x. User space now go > figure what kernel version you are running and behave appropriately. For > distributions supporting these different kernels will become a mess. > > So IMHO, if you can keep pol-specific clearing part a separate series > which gets committed in the same kernel version, would help a lot. Sure, we're at the beginning of this devel window. I'm fairly sure we'll have enough time to sort it out before the next merge window. -- tejun