[This message was sent to the LKML on Mon, 6 Feb 2006 16:29:46 +0100 and nobody replied. Perhaps you did not see it in the flood of mails.] Hello dear developers, I today booted the first time my embedded device using Linux 2.6.15.2, which was booted by pxelinux, which then bootet itself from the nfsroot. This went pretty fine, but when I was reading through Documentation/nfsroot.txt I saw that there are some more modern versions available of loading the kernel and passing parameters. So I added them and the patch for that is attached to this mail. Sincerly, Nico P.S.: Please reply to nico-kernel2 //at// schottelius.org -- Latest release: ccollect-0.3.2 (http://linux.schottelius.org/ccollect/) Open Source nutures open minds and free, creative developers.
--- nfsroot.txt.orig 2006-02-06 16:05:32.000000000 +0100 +++ nfsroot.txt 2006-02-06 16:19:37.000000000 +0100 @@ -3,6 +3,7 @@ Written 1996 by Gero Kuhlmann <[email protected]> Updated 1997 by Martin Mares <[email protected]> +Updated 2006 by Nico Schottelius <[email protected]> @@ -168,7 +169,6 @@ root. If it got a BOOTP answer the directory name in that answer is used. - 3.2) Using LILO When using LILO you can specify all necessary command line parameters with the 'append=' command in the LILO configuration @@ -177,7 +177,11 @@ LILO and its 'append=' command please refer to the LILO documentation. -3.3) Using loadlin +3.3) Using GRUB + When you use GRUB, you simply append the parameters after the kernel + specification: "kernel <kernel> <parameters>" (without the quotes). + +3.4) Using loadlin When you want to boot Linux from a DOS command prompt without having a local hard disk to mount as root, you can use loadlin. I was told that it works, but haven't used it myself yet. In @@ -185,7 +189,7 @@ lar to how LILO is doing it. Please refer to the loadlin docu- mentation for further information. -3.4) Using a boot ROM +3.5) Using a boot ROM This is probably the most elegant way of booting a diskless client. With a boot ROM the kernel gets loaded using the TFTP protocol. As far as I know, no commercial boot ROMs yet @@ -194,6 +198,13 @@ and its mirrors. They are called 'netboot-nfs' and 'etherboot'. Both contain everything you need to boot a diskless Linux client. +3.6) Using pxelinux + Using pxelinux you specify the kernel you built with + "kernel <relative-path-below /tftpboot>". The nfsroot parameters + are passed to the kernel by adding them to the "append" line. + You may perhaps also want to fine tune the console output, + see Documentation/serial-console.txt for serial console help. +
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