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[PATCH] Updated Documentation/nfsroot.txt

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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.

Signed-off-by: Nico Schottelius <nico-kernel@schottelius.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Nico Schottelius 2006-03-24 03:18:18 -08:00 committed by Linus Torvalds
parent d129bceb1d
commit 7e9dd124b9
1 changed files with 14 additions and 3 deletions
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17
Documentation/nfsroot.txt
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@ -3,6 +3,7 @@ Mounting the root filesystem via NFS (nfsroot)
Written 1996 by Gero Kuhlmann <gero@gkminix.han.de> Written 1996 by Gero Kuhlmann <gero@gkminix.han.de>
Updated 1997 by Martin Mares <mj@atrey.karlin.mff.cuni.cz> Updated 1997 by Martin Mares <mj@atrey.karlin.mff.cuni.cz>
Updated 2006 by Nico Schottelius <nico-kernel-nfsroot@schottelius.org>
@ -168,7 +169,6 @@ depend on what facilities are available:
root. If it got a BOOTP answer the directory name in that answer root. If it got a BOOTP answer the directory name in that answer
is used. is used.
3.2) Using LILO 3.2) Using LILO
When using LILO you can specify all necessary command line When using LILO you can specify all necessary command line
parameters with the 'append=' command in the LILO configuration parameters with the 'append=' command in the LILO configuration
@ -177,7 +177,11 @@ depend on what facilities are available:
LILO and its 'append=' command please refer to the LILO LILO and its 'append=' command please refer to the LILO
documentation. 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 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. 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 I was told that it works, but haven't used it myself yet. In
@ -185,7 +189,7 @@ depend on what facilities are available:
lar to how LILO is doing it. Please refer to the loadlin docu- lar to how LILO is doing it. Please refer to the loadlin docu-
mentation for further information. 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 This is probably the most elegant way of booting a diskless
client. With a boot ROM the kernel gets loaded using the TFTP client. With a boot ROM the kernel gets loaded using the TFTP
protocol. As far as I know, no commercial boot ROMs yet protocol. As far as I know, no commercial boot ROMs yet
@ -194,6 +198,13 @@ depend on what facilities are available:
and its mirrors. They are called 'netboot-nfs' and 'etherboot'. and its mirrors. They are called 'netboot-nfs' and 'etherboot'.
Both contain everything you need to boot a diskless Linux client. 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.