Re: howto build debian xen kernel?
On Tue, Feb 06, 2007 at 03:58:45PM +0100, Jonas Meurer wrote: I've installed xen-hypervisor-3.0.3-1-amd64, which includes /boot/xen-3.0.3-1-amd64.gz. Do i still need a xen-enabled host kernel, or may i use the current self compiled kernel? You need a kernel with xen patches and configured as dom0, such as one of the debian xen kernels, or a kernel you've patched yourself. I saw that the current linux-source-2.6.18 from unstable contains a menuconfig option 'Xen support'. I guess that i need to enable this, and then use /boot/xen-3.0.3-1-amd64.gz as domain0 kernel. Is that correct? Well, sort of. The Linux kernel with Xen patches can function as dom0 kernel or domU kernel or both, depending on how it's configured. In dom0's grub config you set the xen hypervisor (in your case /boot/xen-3.0.3-1-amd64.gz) as the kernel, with your dom0 kernel as a module line in grub. Later on you use the domU kernel (which may actually be the exact same kernel you usein dom0) in the user domains' config files. But I cannot find any example kernel config in the xen-docs package. It's pretty self explanatory when you look in the Xen part of the kernel config, if you're using a xen-patched kernel. Cheers, Andy -- http://bitfolk.com/ -- No-nonsense VPS hosting Encrypted mail welcome - keyid 0x604DE5DB signature.asc Description: Digital signature
Re: howto build debian xen kernel?
On 06/02/2007 Grok Mogger wrote: I didn't find any documentation about that topic. All howtos/tutorials/... that talk about building a xen kernel, use the original xen kernel sources, not the debian kernel source with patches. You may have some need to compile your own kernel, but if you'd be fine with a pre-made vanilla Debian kernel, you can just install the appropriate Xen package. The right one will drop a working Xen kernel in your /boot directory. As I recall, you'll have to edit your GRUB menu.lst file and make an initrd with update-initramfs afterwards. I think you want to pick one of the packages that starts with xen-hypervisor. There's a few of them. I hope this might save you some trouble. Hello Grok, I've installed xen-hypervisor-3.0.3-1-amd64, which includes /boot/xen-3.0.3-1-amd64.gz. Do i still need a xen-enabled host kernel, or may i use the current self compiled kernel? I saw that the current linux-source-2.6.18 from unstable contains a menuconfig option 'Xen support'. I guess that i need to enable this, and then use /boot/xen-3.0.3-1-amd64.gz as domain0 kernel. Is that correct? The description for xen-hypervisor-3.0-unstable-1-amd64 claims: In order to boot a XEN system along with this package you also need a kernel specifically crafted to work as the Domain 0, mediating hardware access for XEN itself. An example config file for this kernel and documentation on how to build it can be found in the xen-docs package. But I cannot find any example kernel config in the xen-docs package. greetings, jonas -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: howto build debian xen kernel?
Jonas Meurer wrote: On 06/02/2007 Grok Mogger wrote: I didn't find any documentation about that topic. All howtos/tutorials/... that talk about building a xen kernel, use the original xen kernel sources, not the debian kernel source with patches. You may have some need to compile your own kernel, but if you'd be fine with a pre-made vanilla Debian kernel, you can just install the appropriate Xen package. The right one will drop a working Xen kernel in your /boot directory. As I recall, you'll have to edit your GRUB menu.lst file and make an initrd with update-initramfs afterwards. I think you want to pick one of the packages that starts with xen-hypervisor. There's a few of them. I hope this might save you some trouble. Hello Grok, I've installed xen-hypervisor-3.0.3-1-amd64, which includes /boot/xen-3.0.3-1-amd64.gz. Do i still need a xen-enabled host kernel, or may i use the current self compiled kernel? I saw that the current linux-source-2.6.18 from unstable contains a menuconfig option 'Xen support'. I guess that i need to enable this, and then use /boot/xen-3.0.3-1-amd64.gz as domain0 kernel. Is that correct? The description for xen-hypervisor-3.0-unstable-1-amd64 claims: In order to boot a XEN system along with this package you also need a kernel specifically crafted to work as the Domain 0, mediating hardware access for XEN itself. An example config file for this kernel and documentation on how to build it can be found in the xen-docs package. But I cannot find any example kernel config in the xen-docs package. greetings, jonas Hey Jonas, Okay, first off [quoting] The description for xen-hypervisor-3.0-unstable-1-amd64 claims: In order to boot a XEN system along with this package you also need a kernel specifically crafted to work as the Domain 0, mediating hardware access for XEN itself. An example config file for this kernel and documentation on how to build it can be found in the xen-docs package. But I cannot find any example kernel config in the xen-docs package. [end quoting] I know. Believe me, I know. That frustrated me to no end. I never found any example kernel config either, nor did I find instructions on how I was supposed to build this kernel that I *supposedly* needed. In truth, it turned out that I never had to build a kernel at all. Now is it just me, or does that text not make it sound like you need to install the xen-hypervisor package and then still take further steps to build a kernel? Very misleading at best, flat out wrong at worst. Anyway. Let's see if I can help... Do i still need a xen-enabled host kernel, or may i use the current self compiled kernel? I'm not totally sure what you mean here... I think the short answer is yes, you're kernel needs to be xen-enabled. I saw that the current linux-source-2.6.18 from unstable contains a menuconfig option 'Xen support'. I guess that i need to enable this, and then use /boot/xen-3.0.3-1-amd64.gz as domain0 kernel. Is that correct? I *think* so. I'm not totally sure I understand what you mean, but I think you're on the right track. You have a self-compiled kernel that you were using on a non-Xen system, and you want to use it now with Xen? Is that it? Maybe it'll help if I just show you what I did. I used all pre-packaged kernels that came with Debian, no self-compiling at all. If you have some custom kernel job you need, then maybe you can fill in the gaps around what I did. I did this on etch a while ago with Xen 3.0.2, and here's basically what the process was. I hope I'm not missing anything, I'm doing this from memory. =) 1) Install Xen-Hypervisor. This dropped a kernel in my boot directory. /boot/xen-3.0.2-1-i386.gz. You use this kernel for both your Dom0 and your Guest Domains (DomU's). I guess it also dropped a kernel called vmlinuz-2.6.16-2-xen-686 in /boot. Guess I forgot about that one. =P 2) Edit your /boot/grub/menu.lst file. I had to add an option to boot into Xen. Here's what I added as a sample: ## ## End Default Options ## title Xen 3.0 / XenLinux 2.6 kernel /boot/xen-3.0.2-1-i386.gz dom0_mem=256M console=vga module /boot/vmlinuz-2.6.16-2-xen-686 root=/dev/md0 ro console=tty0 module /boot/initrd.img-2.6.16-2-xen-686 savedefault boot 3) I had to make the initrd you see there (initrd.im-2.6.16-2-xen-686). I recall trying yaird and it not working. I did have success with update-initramfs. I can't recall exactly what I did (sorry!), but I think it required the xen kernel modules. I bet the xen-hypervisor package also created a directory in /lib/modules/ labeled something similar to 2.6.16-2-xen-686 (my xen kernel modules). If not, you may need to install another package to get those. 4) Now I seem to recall that being all I needed to boot into Dom0. The one other thing (which may be fixed now) is that when I tried doing any Xen commands
howto build debian xen kernel?
Hello, I just tried to build a debian xen kernel, based on linux-source-2.6.18, linux-patch-debian-2.6.18 and kernel-package. According to the docs i found, i can apply the debian kernel sources in the following way: resivo:/usr/src/linux-source-2.6.18$ ../kernel-patches/all/2.6.18/apply/debian 2.6.18-10 unfortunately, the xen (and vserver) patches are not in the default patchset, but in an extra 'series'. so i thought that the following should work: resivo:/usr/src/linux-source-2.6.18$ ../kernel-patches/all/2.6.18/apply/debian 2.6.18-10-extra Error: Target revision is not in our list of revisions obviously, it doesn't. So my simple question is: how do i build a debian xen kernel with make-kpkg from debian kernel sources? The official debian kernel images don't use make-kpkg, so it wouldn't help to look in debian/rules from linux-2.6. I didn't find any documentation about that topic. All howtos/tutorials/... that talk about building a xen kernel, use the original xen kernel sources, not the debian kernel source with patches. greetings, jonas -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: howto build debian xen kernel?
Jonas Meurer wrote: Hello, I just tried to build a debian xen kernel, based on linux-source-2.6.18, linux-patch-debian-2.6.18 and kernel-package. According to the docs i found, i can apply the debian kernel sources in the following way: resivo:/usr/src/linux-source-2.6.18$ ../kernel-patches/all/2.6.18/apply/debian 2.6.18-10 unfortunately, the xen (and vserver) patches are not in the default patchset, but in an extra 'series'. so i thought that the following should work: resivo:/usr/src/linux-source-2.6.18$ ../kernel-patches/all/2.6.18/apply/debian 2.6.18-10-extra Error: Target revision is not in our list of revisions obviously, it doesn't. So my simple question is: how do i build a debian xen kernel with make-kpkg from debian kernel sources? The official debian kernel images don't use make-kpkg, so it wouldn't help to look in debian/rules from linux-2.6. I didn't find any documentation about that topic. All howtos/tutorials/... that talk about building a xen kernel, use the original xen kernel sources, not the debian kernel source with patches. greetings, jonas You may have some need to compile your own kernel, but if you'd be fine with a pre-made vanilla Debian kernel, you can just install the appropriate Xen package. The right one will drop a working Xen kernel in your /boot directory. As I recall, you'll have to edit your GRUB menu.lst file and make an initrd with update-initramfs afterwards. I think you want to pick one of the packages that starts with xen-hypervisor. There's a few of them. I hope this might save you some trouble. - GM -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.432 / Virus Database: 268.17.26/670 - Release Date: 2/5/2007 2:04 PM -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
