Re: [Xen-users] problem booting xen 3.0 dom0 on

[Anthony Liguori <aliguori@xxxxxxxxxx>]

Hi Jayesh,

You want:

title           Xen 3.0 / XenLinux 2.6
root            (hd0,0)
kernel          /boot/xen-3.0.0.gz console=vga
module          /boot/vmlinuz- 2.6.12.6-xen0 root=/dev/hda1 ro 
console=tty1 console=ttyS0,38400 quiet splash
module          /boot/initrd-2.6.12.6-xen0.img

initrd is strictly for the Linux boot protocol whereas Xen uses 
multiboot.  With multiboot, there's no difference between the initrd or 
the dom0 other than order (they're both just modules).
Regards,

Anthony Liguori

Jayesh Salvi wrote:

> Hi,
>
> I am installing Xen 3.0 on a Ubuntu system. I am having trouble making 
> the GRUB boot with the Xen dom0 image I built. I am using the 
> initramdisk created by commands:
> # depmod 2.6.12.6-xen0
> # mkinitramfs -o initrd-2.6.12.6-xen0.img 2.6.12.6-xen0
>
> Grub version: GNU GRUB  version 0.95
> -------------------------------------------------------------------------------------------------------------------------------------------------------------- 
>
> The title paragraphs from menu.lst - first for regular Ubuntu kernel 
> and second for Xen.
> title           Ubuntu, kernel 2.6.12-9-686
> root            (hd0,0)
> kernel          /boot/vmlinuz-2.6.12-9-686 root=/dev/hda1 ro 
> console=tty1 console=ttyS0,38400 quiet splash
> initrd          /boot/initrd.img-2.6.12-9-686
> savedefault
> boot
>
> title           Xen 3.0 / XenLinux 2.6
> root            (hd0,0)
> kernel          /boot/xen-3.0.0.gz console=vga
> module          /boot/vmlinuz- 2.6.12.6-xen0 root=/dev/hda1 ro 
> console=tty1 console=ttyS0,38400 quiet splash
> initrd          /boot/initrd-2.6.12.6-xen0.img
> boot
> -------------------------------------------------------------------------------------------------------------------------------------------------------------- 
>
> When I boot Xen 3.0/XenLinux 2.6, I get the  following message:
> -------------------------------------------------------------------------------------------------------------------------------------------------------------- 
>
>  Booting 'Xen 3.0 / XenLinux 2.6'
>
> root  (hd0,0)
>  Filesystem type is ext2fs, partition type 0x83
> kernel  /boot/xen-3.0.0.gz console=vga
>    [Multiboot-elf, <0x100000:0x6b1ec:0x2be14>, shtab=0x197078, 
> entry=0x100000]
> module  /boot/vmlinuz-2.6.12.6-xen0 root=/dev/hda1 ro console=tty1 
> console=ttyS
> 0,38400 quiet splash
>    [Multiboot-module @ 0x198000, 0x4c13cc bytes]
> initrd  /boot/initrd-2.6.12.6-xen0.img
>
> Error 19: Linux kernel must be loaded before initrd
>
> Press any key to continue...
> --------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>
>
> I don't understand what is wrong with my grub entry for Xen. 
> xen-3.0.0.gz is a multi-boot kernel. I built it from the Xen 3.0 
> source code.
> I also don't understand the exact difference in giving the vmlinuz* 
> image as a kernel as in first paragraph, versus giving it as a module 
> as in Xen paragraph.
> Can anyone tell me what can I try?
>
> Thanks
> --
> Jayesh
>
> ------------------------------------------------------------------------
>
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