From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with archive (Exim 4.43) id 1H6beP-0003FA-TO for mharc-grub-devel@gnu.org; Mon, 15 Jan 2007 18:54:06 -0500 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1H6beN-0003Ch-Vu for grub-devel@gnu.org; Mon, 15 Jan 2007 18:54:04 -0500 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1H6beL-0003Au-QM for grub-devel@gnu.org; Mon, 15 Jan 2007 18:54:02 -0500 Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1H6beL-0003Al-Ar for grub-devel@gnu.org; Mon, 15 Jan 2007 18:54:01 -0500 Received: from [213.9.97.14] (helo=webmailer.hkn.de) by monty-python.gnu.org with esmtp (Exim 4.52) id 1H6beJ-0008D0-Q0 for grub-devel@gnu.org; Mon, 15 Jan 2007 18:54:00 -0500 Received: from localhost (localhost [127.0.0.1]) by webmailer.hkn.de (Postfix) with ESMTP id 9544F18000127 for ; Tue, 16 Jan 2007 00:53:29 +0100 (CET) Received: from webmailer.hkn.de ([127.0.0.1]) by localhost ( [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 01016-35 for ; Tue, 16 Jan 2007 00:53:29 +0100 (CET) Received: from [84.152.67.122] (p5498437A.dip0.t-ipconnect.de [84.152.67.122]) by webmailer.hkn.de (Postfix) with ESMTP id 62A831800008D for ; Tue, 16 Jan 2007 00:53:29 +0100 (CET) Message-ID: <45AC1401.2050503@flexible-solutions.de> Date: Tue, 16 Jan 2007 00:53:37 +0100 From: Volker Jung User-Agent: Thunderbird 1.5.0.7 (Windows/20060909) MIME-Version: 1.0 To: grub-devel@gnu.org Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: Starting a kernel out of a running kernel... X-BeenThere: grub-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: The development of GRUB 2 List-Id: The development of GRUB 2 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 15 Jan 2007 23:54:04 -0000 Hello, is there a solution for starting a new Linux kernel out of a running Linux kernel using GRUB or a changed GRUB? First I thought I could use LILO. But LILO runs in real mode, not having any idea about protected mode. GRUB runs in protected mode itself - in order to boot an OS it has to switch back to real mode or to prepare the protected mode control registers of the CPU to start the OS. So GRUB may be able to pass control from one kernel to the other. The idea: Instead of using GRUBs abilities to do various things inside a shell one could use it to boot a complete Linux. Then one can do everything one wants and afterwards one could start the desired system WITHOUT rebooting. Perhaps this sounds crazy but there is a problem where this idea would be helpful: So you could implement a read only failsafe system that starts again whenever you reset your remote server and out of this system (remotely controlled via SSH or similar) you could start the desired system WITHOUT having to reboot which would again start the failsafe system which isn't the thing one wants. You can call this "GRUB with a fully featured OS"... In LILO this behaviour could be implemented using the -R option - but this assumes a read write medium... Any suggestions? Thanks in advance Volker