Re: custom kernel without initrd and with udev

[Dom]

On 07/07/12 16:46, Mike McClain wrote:
Hi Dom,

     Thanks for your suggestions and letting me know this is still possible.

On Sat, Jul 07, 2012 at 04:56:10AM +0100, Dom wrote:
On 07/07/12 00:08, Mike McClain wrote:
<snip>
     Is anyone running a custom kernel without an initrd with udev?

Yes, I am. Although I believe there are some circumstances where
this may not be possible. eg. where something else needs to be
started in order to mount the root filesystem first.

How do you get around the fact that udev is not running yet?
May I see what your entry in grub.cfg looks like for this kernel?

By using the device name, rather than UUID or Label, it seems.

grub.cfg (for grub2) is:

#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
  load_env
fi
set default="0"
if [ "${prev_saved_entry}" ]; then
  set saved_entry="${prev_saved_entry}"
  save_env saved_entry
  set prev_saved_entry=
  save_env prev_saved_entry
  set boot_once=true
fi

function savedefault {
  if [ -z "${boot_once}" ]; then
    saved_entry="${chosen}"
    save_env saved_entry
  fi
}

function load_video {
  insmod vbe
  insmod vga
  insmod video_bochs
  insmod video_cirrus
}

insmod part_msdos
insmod ext2
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set=root bad6c13d-19f0-47ad-bc6e-542a911d4178
if loadfont /usr/share/grub/unicode.pf2 ; then
  set gfxmode=800x480x24
  load_video
  insmod gfxterm
  insmod part_msdos
  insmod ext2
  set root='(hd0,msdos1)'
  search --no-floppy --fs-uuid --set=root 
bad6c13d-19f0-47ad-bc6e-542a911d4178
  set locale_dir=($root)/boot/grub/locale
  set lang=en_GB
  insmod gettext
fi
terminal_output gfxterm
set timeout=5
play 480 440 1
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=cyan/blue
set menu_color_highlight=white/blue
### END /etc/grub.d/05_debian_theme ###

### BEGIN /etc/grub.d/10_linux ###
menuentry 'Debian GNU/Linux, with Linux 3.2.19.libby2-586' --class 
debian --class gnu-linux --class gnu --class os {
        load_video
        set gfxpayload=keep
        insmod gzio
        insmod part_msdos
        insmod ext2
        set root='(hd0,msdos1)'
	search --no-floppy --fs-uuid --set=root 
bad6c13d-19f0-47ad-bc6e-542a911d4178
        echo    'Loading Linux 3.2.19.libby2-586 ...'
        linux   /boot/vmlinuz-3.2.19.libby2-586 root=/dev/hda1 ro  quiet noapm
}

(irrelevant bits trimmed)
--
Dom


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