Bug#627226: grub-common: Support for different options for Linux and Xen Linux kernels

[Pawel Tecza]

Package: grub-common
Version: 1.98+20100804-14
Severity: wishlist
Tags: patch

Hello,

I need to pass different options for Linux and Xen Linux kernels on my
server. Please look at the exemplary menu entries below:

menuentry 'Debian GNU/Linux, with Linux 2.6.32-5-xen-amd64 and XEN
4.0-amd64' --class debian --class gnu-linux --class gnu --class os
--class xen {
        insmod raid
        insmod mdraid
        insmod lvm
        insmod part_gpt
        insmod part_gpt
        insmod ext2
        set root='(lvm0-dom0)'
        search --no-floppy --fs-uuid --set
5e6467b4-b670-4ea7-9fb3-9f45b94c93fe
        echo    'Loading Linux 2.6.32-5-xen-amd64 ...'
        multiboot       /boot/xen-4.0-amd64.gz placeholder com1=9600,8n1
console=com1,vga dom0_mem=1024M
        module  /boot/vmlinuz-2.6.32-5-xen-amd64 placeholder
root=/dev/mapper/lvm0-dom0 ro console=tty0 console=hvc0 3
        echo    'Loading initial ramdisk ...'
        module  /boot/initrd.img-2.6.32-5-xen-amd64
}

menuentry 'Debian GNU/Linux, with Linux 2.6.32-5-xen-amd64' --class
debian --class gnu-linux --class gnu --class os {
        insmod raid
        insmod mdraid
        insmod lvm
        insmod part_gpt
        insmod part_gpt
        insmod ext2
        set root='(lvm0-dom0)'
        search --no-floppy --fs-uuid --set
5e6467b4-b670-4ea7-9fb3-9f45b94c93fe
        echo    'Loading Linux 2.6.32-5-xen-amd64 ...'
        linux   /boot/vmlinuz-2.6.32-5-xen-amd64
root=/dev/mapper/lvm0-dom0 ro console=tty0 console=ttyS0,9600n8 2
        echo    'Loading initial ramdisk ...'
        initrd  /boot/initrd.img-2.6.32-5-xen-amd64
}

As you can see I use different consoles for these kernels. I can't set
them in only one GRUB_CMDLINE_LINUX variable in /etc/default/grub file,
because grub-update command will use it for any my Linux kernels...

So I've patched 20_linux_xen and grub-mkconfig scripts and added new
GRUB_CMDLINE_LINUX_XEN variable for options of Xen Linux kernels:

GRUB_CMDLINE_LINUX="console=tty0 console=ttyS0,9600n8 2"
GRUB_CMDLINE_LINUX_XEN="console=tty0 console=hvc0 3"

Of course, GRUB_CMDLINE_LINUX_XEN is optional variable. grub-update will
use GRUB_CMDLINE_LINUX if the new variable is unset or empty.

I believe that now GRUB_CMDLINE_XEN and GRUB_CMDLINE_LINUX_XEN is the
same pair like xenhopt and xenopt for old Grub.

I'm attaching my simple patch. Feel free to use it if you want.

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