From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751330AbVHXR4a (ORCPT ); Wed, 24 Aug 2005 13:56:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751331AbVHXR4a (ORCPT ); Wed, 24 Aug 2005 13:56:30 -0400 Received: from leyde.iplannetworks.net ([200.69.193.99]:10693 "EHLO proxy3.iplannetworks.net") by vger.kernel.org with ESMTP id S1751330AbVHXR43 (ORCPT ); Wed, 24 Aug 2005 13:56:29 -0400 Message-ID: <430CB3EC.2000502@latinsourcetech.com> Date: Wed, 24 Aug 2005 14:52:44 -0300 From: =?ISO-8859-1?Q?M=E1rcio_Oliveira?= User-Agent: Mozilla Thunderbird 1.0.6 (X11/20050716) X-Accept-Language: en-us, en MIME-Version: 1.0 To: "John W. Linville" Cc: linux-kernel@vger.kernel.org Subject: Re: Problem with kernel image in a Prep Boot on PowerPC References: <430C8CB5.1050501@latinsourcetech.com> <20050824163100.GD1100@tuxdriver.com> In-Reply-To: <20050824163100.GD1100@tuxdriver.com> Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org John W. Linville wrote: >On Wed, Aug 24, 2005 at 12:05:25PM -0300, Márcio Oliveira wrote: > > > >> I think the kernel is pointing to the wrong root partiotion. In a x86 >>box, I can change the kernel root partition in the boot loader (root= >>parameter) or using the "rdev" command. In my case, the IBM Power >>doesn't have a boot loader (yaboot was replaced by the kernel image) and >>the powerpc64 system doesn't have the rdev command (from util-linux >>package, the same package on x86 systems have the rdev command!). >> >> > >I don't know anything that will do this on a pre-built kernel. But, >you should look at CONFIG_CMDLINE_BOOL and CONFIG_CMDLINE in your >kernel configuration. That will let you pre-configure the "root=" >command line option. > > Hi John, The command rdev can change the default root partition on x86 linux systems with pre-built kernels. About the CONFIG_CMDLINE in the kernel configuration, I found it in lots of files in the kernel source tree and I'd like to know which file I need to change this value (/usr/src/linux/arch/ppc64/defconfig ?). >I don't know if ppc64 can use the zImage-style boot wrapper. If it >can, that would provide you with an option of modifying the command >line at boot time if needed. > > According to this doc: http://www-128.ibm.com/developerworks/eserver/library/es-SW_RAID_LINUX.html, ppc64 can use zImage-style boot wrapper, so I'm trying it. >Good luck! > >John > > Thanks John! Márcio.