linux-kernel - Re: Mounting NFS root FS

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Message-ID: <Pine.LNX.4.61.0612022253280.25553@yvahk01.tjqt.qr>
Date:	Sat, 2 Dec 2006 22:56:38 +0100 (MET)
From:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
To:	Willy Tarreau <w@....eu>
cc:	William Estrada <MrUmunhum@...dial.com>,
	linux-kernel@...r.kernel.org
Subject: Re: Mounting NFS root FS


>> > I have been trying to make FC5's kernel do a boot with an NFS root file
>> > system.  I see
>> > the support is in the kernel(?).  I have tried this:
>> >
>> >> root=/dev/nfs nfsroot=10.1.1.12:/tftpboot/NFS/Root_FS
>> 
>> This feature is almost deprecated. One is supposed to use initramfs,
>> /sbin/ip or some DHCP client, and a mount program nowadays.
>
>But I think that there are plenty of light terminals still booting like
>this which will not be able to upgrade anymore then. Even right here,
>my web server (parisc) boot from the network that way. At least an
>initramfs would need to be able to cope with the same syntax,

No problem:

<<</init<<<
#!/bin/bash

for o in `cat /proc/cmdline`; do
    case "$o" in
        nfsroot=*)
            arg="${o##nfsroot=}";
            ;;
    esac;
done;

### further parse $arg
>>>

simplified example of how this can be accomplished. This is why
initrds/initramfs are so much more powerful than in-kernel software.


	-`J'
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