Kernel 2.4.22-k7-1: initrd cannot mount proc from cramfs image
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[Found the thread about init/cramfs, this seems a different issue.]
I installed the kernel-image-2.4.22-1-k7 package on an Asus L3355M laptop,
but it won't boot, giving the same kernel panic with both lilo and grub.
Relevant parameters for lilo:
boot=/dev/hda
root=/dev/hda5
# compact
install=/boot/boot-menu.b
map=/boot/map
image=/boot/vmlinuz-2.4.22-1-k7
label=linux
initrd=/boot/initrd.img-2.4.22-1-k7
read-only
Relevant parameters for grub:
title Debian GNU/Linux, kernel 2.4.22-1-k7
root (hd0,4)
kernel /boot/vmlinuz-2.4.22-1-k7 root=/dev/hda5 ro
initrd /boot/initrd.img-2.4.22-1-k7
boot
Here are the last lines on the screen before the panic:
RAMDISK: cramfs filesystem found at block 0
RAMDISK: Loading 3532 blocks [1 disk] into ram disk... done.
Freeing initrd memory: 3532k freed
VFS: mounted root (cramfs filesystem).
mount: Usage: mount [-t filesystemtype] [-o options,...] device mountpoint
This is a builtin command. /etc/fstab and /etc/mtab are NOT supported.
cat: No file proc/sys/kernel/real-root-dev.
/linuxrc: cannot create proc/sys/kernel/real-root-dev: directory nonexistent
VFS: Cannot open root device "hda5" or 03:05
Please append a correct "root=" boot option
Kernel panic: VFS: Unable to mount root fs on 03:05
Having mounted the initrd cramfs image with the command
# mount /boot/initrd.img-2.4.22-1-k7 /initrd -o loop
the contents of the linuxrc script are:
#!/bin/sh
#
# $Id: linuxrc,v 1.7 2003/08/05 10:14:01 herbert Exp $
export PATH=/sbin:/bin
mount -nt proc proc proc
root=$(cat proc/sys/kernel/real-root-dev)
echo 256 > proc/sys/kernel/real-root-dev
umount -n proc
mount -nt tmpfs tmpfs tmp || mount -nt ramfs ramfs tmp
echo $root > tmp/root
It looks like it cannot mount the proc filesystem. The command
# /initrd/bin/mount --help
includes a mention of the -n parameter, so that may not be the problem.
Adding the boot parameter "devfs=mount" to grub results in the following
added line, but still no joy:
- --- 01.txt 2003-11-11 08:20:43.000000000 +0100
+++ 02.txt 2003-11-11 08:21:08.000000000 +0100
@@ -2,6 +2,7 @@
RAMDISK: Loading 3532 blocks [1 disk] into ram disk... done.
Freeing initrd memory: 3532k freed
VFS: mounted root (cramfs filesystem).
+Mounted devfs on /dev
mount: Usage: mount [-t filesystemtype] [-o options,...] device mountpoint
This is a builtin command. /etc/fstab and /etc/mtab are NOT supported.
Any hint about what to look for? Thanks.
- --
"The open-source movement seems on the verge of winning its bid to
define the computing infrastructure of tomorrow - and the core of
that infrastructure will be Unix machines running on the Internet."
-- Eric S. Raymond
Nicola Larosa - nico@tekNico.net
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