Finally Mark Johnson submitted to xen-devel mailing list patch for ZFS 24 support at Xen 4.0. Patch mentioned bellow was successfully tested at Xen 4.0 Dom0 with pvops kernel 2.6.32.11 on top of Fedora 12

The most recent features of Jeremy Fitzhardinge kernel have been enabled and tested at Xen 3.5 Dom0 on top of Ubuntu Karmic Koala (Beta) Server. Xen host been built reboots directly into Gnome Desktop environment on the box with Core2Quad CPU, 8 GB RAM, Radeon HD 4X50 Video Card. Tuning kernel 2.6.31.1 described in details bellow with snapshots of every configuration step been taken.

We presume , that xen-3.4.1-5.fc12.src.rpm has been already installed on the system and Xen Host been built via mentioned “rpm” , Libvirt 0.7.1-15 and 2.6.31.6 pvops kernel is up and running at the time of upgrade. Apply following patch to /root/rpmbuild/SPECS/xen.spec

The final target of this post is to demonstrate how flexible is Ubuntu Karmic Koala Server environment. Build Xen 4.0-rc8 and the most recent stable pvops kernel 2.6.32.10 Loading Xen Instance followed by install Ubuntu’s Libvirt environment, providing utility virt-install for creating PV and HVM DomUs, virt-manager completely functional to manage any DomU been built via virt-install.

The schema bellow would work fine at same Xen 4.0 Dom0 on top of Ubuntu 9.10 Server with several issues to be fixed. Virt-install command line would require –os-type=linux –os-variant=rhel5 , symlink for pygrub , invoked by default , should be created pointing to /usr/local/bin/pygrub. On Fedora 12 everything is just ready for RHEL 6 PV DomU virt-install.

Michael Young wrote xen-4.0.0-0.2.rc4.fc12.src.rpm for Xen-4-rc4 for Fedora 12 to install Hypervisor (changeset 20950).

A brief description of Xen 3.4.1 and Libvirt 0.7.1-15 deployment to Fedora 12 follows bellow...

Following bellow is build Xen Host on top Ubuntu 9.10 Server.It is based on direct clone via “hg” and build Xen 3.4.3-rc4 from xensource.com,applying Andrew Lyon’s 2.6.31 patch set V12 to vanilla kernel 2.6.31.12 along with tuning patched kernel via “make menuconfig” and building aka Suse xenified kernel in Ubuntu 9.10 environment.Notice that forward porting of original patch set was don

Due to set of CSs for GRUB 2 Support written by Ian Campbell usual sharing image devices between Ubuntu Karmic Koala Server HVM and PV Guests appears available at Xen-4.0 Linux Dom0. Fedora 12 has been selected due to presence of Libvirt 0.7.1 providing virt-install and virt-manager utilities.