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85 lines
3.7 KiB
Text
85 lines
3.7 KiB
Text
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kernel-xen.sh: Xen dom0 kernel using rebased OpenSUSE xen-patches.
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This script patches and builds the Linux Kernel for the Xen Hypervisor.
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To run this scipt you will need the Xen kernel patches in this directory.
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The patches may be downloaded from:
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http://gentoo-xen-kernel.googlecode.com/files/xen-patches-2.6.34-4.tar.bz2
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(md5sum: 25ba07cf0702130af26c045fd6227f2f)
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Note on kernel: You will need to get kernel version 2.6.34.4 because patches
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based on Slackware stock kernel tree (2.6.33.4) do not work as expected.
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Anyway, you can get it from:
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http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.33.4.tar.bz2
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(md5sum: f75d21e5c60f18adf0e99d61c243f964)
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The included configuration files are based on Slackware's kernel. For
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Slackware32, the SMP kernels were used as the non-smp kernels would not compile
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with the Xen patches. For the Xen-specific parameters, the default options were
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used as much as possible. You may run "make menuconfig" before compiling the
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Xen kernel by passing the "MENUCONFIG=yes" to the scipt.
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Another variable worth mentioning here is "BOOTLOADER=", you can use it to
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select how kernel is packed. Valid options are "lilo" and "grub".
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By default, the huge kernel is chosen, but you may opt for the generic kernel
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by passing the "KERNEL=generic" variable to the script. In this case, you
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will need to make an ad-hoc initrd after installing this package.
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For example:
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depmod 2.6.34.4-xen
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mkinitrd -c -k 2.6.34.4-xen -f ext4 -r /dev/sda1 -m ext4 -o /boot/initrd-xen.gz
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For details on initrd, read /boot/README.initrd, run
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/usr/share/mkinitrd/mkinitrd_command_generator.sh for hints and read the Xen
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User Manual and the README file that comes with the Xen package.
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Since booting Xen kernel with LILO is not supported by default we have to
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either use GRUB, or mbootpack to create a LILO compatible kernel.
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This is an example how to do it with LILO, mbootpack and initrd:
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cd /boot
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gzip -d -c /boot/xen-4.0.1.gz > /boot/xen-4.0.1
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gzip -d -c /boot/initrd-xen.gz > /boot/initrd-xen
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mbootpack -o /boot/vmlinuz-2.6.34.4-xen -m /usr/src/linux-2.6.34.4-xen/vmlinux \
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-m /boot/initrd-xen /boot/xen-4.0.1
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After new kernel image is created, add something like the folowing to lilo.conf:
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image = /boot/vmlinuz-xen
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root = /dev/sda1
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label = XenLinux
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append="dom0_mem=256M -- nomodeset"
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read-only
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Note: everything before "--" is passed to Xen, and everything after "--" is
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passed to the Linux kernel.
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If for some reason LILO is not good enough, you can always use GRUB.
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GRUB may be installed from Slackware's extra repository. The GRUB package
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is not available from the Slackware x86_64 distribution, but the source
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and a SlackBuild may be found in its extra/source repository.
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grubconfig that comes with Slackware's GRUB package may give a starting point
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to configure GRUB. Moreover, the Xen User Manual and its README file installed
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with the Xen package include details on which parameters to include in the GRUB
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configuration file. For example, include these lines in /boot/grub/menu.lst:
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title Slackware XenLinux 13.1
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root (hd0,0)
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kernel /boot/xen.gz dom0_mem=262144 console=vga
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module /boot/vmlinuz-xen root=/dev/sda1 ro console=tty0 nomodeset
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module /boot/initrd-xen.gz
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Notes on bootloader:
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A dom0_mem parameter is critical for Slackware32.
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You only need the initrd module if you install the generic kernel.
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Aditional notes on framebuffer:
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If your dom0 kernel gets stuck on boot with a blinking cursor on the screen,
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and you have an old VGA card, don't panic, there is a way arround it!
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Easiest method is to boot from non-xen kernel, and blacklist a framebuffer
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module from ever loading. Another option would be to replace VGA card with
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a newer one, or remove module in the next kernel build.
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