From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id CA726C5475B for ; Fri, 1 Mar 2024 22:43:32 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4Tmjmg31vFz3vh4 for ; Sat, 2 Mar 2024 09:43:31 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=none (no SPF record) smtp.mailfrom=allandria.com (client-ip=50.242.82.17; helo=cynthia.allandria.com; envelope-from=flar@allandria.com; receiver=lists.ozlabs.org) X-Greylist: delayed 2192 seconds by postgrey-1.37 at boromir; Sat, 02 Mar 2024 09:43:06 AEDT Received: from cynthia.allandria.com (cynthia.allandria.com [50.242.82.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4TmjmB0Gygz3c5P for ; Sat, 2 Mar 2024 09:43:05 +1100 (AEDT) Received: from flar by cynthia.allandria.com with local (Exim 4.84_2) (envelope-from ) id 1rgB1B-00050T-F9; Fri, 01 Mar 2024 14:06:13 -0800 Date: Fri, 1 Mar 2024 14:06:13 -0800 From: Brad Boyer To: John Paul Adrian Glaubitz Subject: Re: Boot failure with ppc64 port on iMacs G5 Message-ID: <20240301220613.GA18805@allandria.com> References: <42e9a15f6733dd48c64cbceeb3ad27349ca8c3e4.camel@physik.fu-berlin.de> <87r0gvg49s.fsf@mail.lhotse> <87frxag1ew.fsf@mail.lhotse> <1768836b7e6895f3c2fb0cb4a01a40fee7473dd5.camel@physik.fu-berlin.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1768836b7e6895f3c2fb0cb4a01a40fee7473dd5.camel@physik.fu-berlin.de> User-Agent: Mutt/1.5.23 (2014-03-12) X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: debian-powerpc@lists.debian.org, linuxppc-dev , tuxayo , Claudia Neumann Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Fri, Mar 01, 2024 at 03:47:26PM +0100, John Paul Adrian Glaubitz wrote: > The problem is that the newer image doesn't boot and currently I don't know > why because installing the exact same kernel later from the package manager > into an installed system works yields a bootable system with the latest > kernel. > > The installer images are built from the same kernel package which makes the > whole thing even more confusing. Perhaps it's a memory allocation problem before the kernel has fully configured the MMU? I know in the past the kernel could be touchy about how memory was mapped in the very early stages of boot. If we happened to be near some limit, even a small increase in the size of the kernel might have pushed us over the edge. I'm not sure of the exact details, but perhaps the memory setup is slightly different when booted from the CD image. I haven't looked at recent images, but I know in the past the boot process was different on CD compared to after the install. Brad Boyer flar@allandria.com