From owner-freebsd-hackers@FreeBSD.ORG Mon Apr 18 16:56:28 2011 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 4F6DB1065674; Mon, 18 Apr 2011 16:56:28 +0000 (UTC) (envelope-from jhb@freebsd.org) Received: from cyrus.watson.org (cyrus.watson.org [65.122.17.42]) by mx1.freebsd.org (Postfix) with ESMTP id 255258FC0A; Mon, 18 Apr 2011 16:56:28 +0000 (UTC) Received: from bigwig.baldwin.cx (66.111.2.69.static.nyinternet.net [66.111.2.69]) by cyrus.watson.org (Postfix) with ESMTPSA id D1B8546B51; Mon, 18 Apr 2011 12:56:27 -0400 (EDT) Received: from jhbbsd.localnet (unknown [209.249.190.124]) by bigwig.baldwin.cx (Postfix) with ESMTPSA id 66AC48A01B; Mon, 18 Apr 2011 12:56:27 -0400 (EDT) From: John Baldwin To: freebsd-hackers@freebsd.org Date: Mon, 18 Apr 2011 08:24:57 -0400 User-Agent: KMail/1.13.5 (FreeBSD/8.2-CBSD-20110325; KDE/4.5.5; amd64; ; ) References: <20110415.150349.671.1@DEV> <20110416.142444.546.5@DEV> In-Reply-To: <20110416.142444.546.5@DEV> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-15" Content-Transfer-Encoding: 7bit Message-Id: <201104180824.57541.jhb@freebsd.org> X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.2.6 (bigwig.baldwin.cx); Mon, 18 Apr 2011 12:56:27 -0400 (EDT) Cc: rank1seeker@gmail.com, Pawel Jakub Dawidek Subject: Re: Add SUM sysctl X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 18 Apr 2011 16:56:28 -0000 On Saturday, April 16, 2011 10:24:44 am rank1seeker@gmail.com wrote: > After compilation of kernel and world in MUM, kernel is installed in MUM, > but to install world, we reboot into SUM, then install world. (HANDBOOK) > Now, in case of GELI usage AND if upgrading is taking place, i.e; 8.2 -> > 8.3, once you reboot into SUM to install world, you are doomed, BECAUSE > ... > Kernel will bitch (GELI part), about world->kernel mismatch and you won't > be able to install world as you cant decrypt geom providers!! > The only way to save yourself in that case is to restore /boot/kernel.old, > or one is doomed. This seems broken to me. An 8.3 kernel+modules should be able to handle GELI devices with an 8.2 world. If they can't, it means someone broke the ABI. Even a 9.0 kernel should work fine with an 8.x-stable world. -- John Baldwin