[PATCH] Updated Documentation/nfsroot.txt

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>

diff --git a/Documentation/nfsroot.txt b/Documentation/nfsroot.txt
index a87d4af..d56dc71 100644 (file)
--- a/Documentation/nfsroot.txt
+++ b/Documentation/nfsroot.txt
@@ -3,6 +3,7 @@ Mounting the root filesystem via NFS (nfsroot)
 
 Written 1996 by Gero Kuhlmann <gero@gkminix.han.de>
 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
        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 @@ depend on what facilities are available:
        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 @@ depend on what facilities are available:
        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 @@ depend on what facilities are available:
        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.
+