From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750888AbWAYAPY (ORCPT ); Tue, 24 Jan 2006 19:15:24 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750889AbWAYAPY (ORCPT ); Tue, 24 Jan 2006 19:15:24 -0500 Received: from smtp.osdl.org ([65.172.181.4]:10718 "EHLO smtp.osdl.org") by vger.kernel.org with ESMTP id S1750887AbWAYAPX (ORCPT ); Tue, 24 Jan 2006 19:15:23 -0500 Date: Tue, 24 Jan 2006 16:17:14 -0800 From: Andrew Morton To: "Rafael J. Wysocki" Cc: pavel@ucw.cz, linux-kernel@vger.kernel.org Subject: Re: [PATCH -mm] swsusp: userland interface (rev 2) Message-Id: <20060124161714.0118f1af.akpm@osdl.org> In-Reply-To: <200601250053.27394.rjw@sisk.pl> References: <200601240929.37676.rjw@sisk.pl> <20060124135843.739481e7.akpm@osdl.org> <20060124221426.GB1602@elf.ucw.cz> <200601250053.27394.rjw@sisk.pl> X-Mailer: Sylpheed version 1.0.0 (GTK+ 1.2.10; i386-vine-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org "Rafael J. Wysocki" wrote: > > IMHO after it gets into mainline every next version of the interface should > be backwards compatible with the previous one. That's insufficient. Every new version of the userspace tools also needs to be back-compatible with (and tested against!) older kernels. Otherwise, people who upgrade both their kernel and userspace will find that their old kernels don't work right, so they have to downgrade their userspace tools too.