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55 lines
2.7 KiB
Text
55 lines
2.7 KiB
Text
kernel-xen.sh: This script builds the Linux Kernel for a Xen Hypervisor.
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The configuration files included here are based on generic Slackware configs.
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For 32bit systems, SMP based config was used. You can run "make menuconfig"
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before compiling a Xen kernel by passing the "MENUCONFIG=yes" to the script.
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Originaly, booting a Xen kernel with LILO bootloader is not supported, so GRUB
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has to be used. Since some of us still preffer LILO over GRUB, there is a way
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to accomplish this with mbootpack. Basicaly mbootpack takes Linux kernel, initrd
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and Xen VMM, and packages them up as a single file that looks like a bzImage
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Linux kernel. To select how kernel is packed use "BOOTLOADER=" variable. Valid
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options are "lilo" and "grub".
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Since generic kernel requires an initrd image, there are aditional variables that
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can be used, such as ROOTMOD (list of root filesystem modules), ROOTFS (name of a
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module to use) and ROOTDEV (name of root filesystem device).
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After a 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/sda2
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label = XenLinux
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append="dom0_mem=512M -- 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 14.0
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root (hd0,0)
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kernel /boot/xen.gz dom0_mem=524288 console=vga
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module /boot/vmlinuz-xen root=/dev/sda2 ro console=tty0 nomodeset
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module /boot/initrd-xen.gz
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Note that dom0_mem parameter is critical for a 32bit install.
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If your dom0 kernel crashes or freezes at boot, either with an automatic reboot
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or with the blank screen, here are some things to try:
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- Specify an out of range number to "fbcon" to disable framebuffer altogether,
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for an example append fbcon=map:9 to the Linux kernel.
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(To see a list of available devices in your system: cat /proc/fb)
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- Blacklist framebuffer module from loading. This one requires a bit of
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digging arround in dmesg/lsmod to find out wich module is in use.
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- Disable framebuffer devices by setting CONFIG_FB=n in kernel config.
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- Try another VGA card (sorry).
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