The most recent pvops kernel 2.6.32.19 allows to enable kernel modesetting (KMS) under Xen 4.0.1-rc6 on top of Ubuntu Lucid Server and Fedora 13. Actually , current setup of Xen 4.0.1&PVOPS on top of Ubuntu 10.04 Server is different from http://wiki.xen.org/xenwiki/Xen4.0 : How to install Xen 4.0 (1) and brief instructions follow bellow.

XenSource has signed a new agreement with NEC that looks to expand the market for XenEnterprise.

The June 25 agreement gives XenSource, the Palo Alto, Calif., virtualization company created by the original developers of the Xen open-source hypervisor project, access to an OEM with a significant global reach in the x86 market.

This post follows up Mark McLoughlin's ANNOUNCE: Rawhide virt repo for F11 users:- Another update available in http://markmc.fedorapeople.org/virt-preview.

Finally Mark Jonson 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 via modifying Michael’s Young xen-4.0.0.7.fc12.src.rpm and direct patching xen 4.0 official tarball on Ubuntu Karmic Koala Server.

The most recent version of Spice-Gtk-0.7 coming from Debian Unstable doesn't support GObject-introspection. Original version ([1]) is not supposed to install files like *.gir and *.typelib. It also requires fixes for debian/control and debian/rules. To understand better why this step has to be undertaken, please , view "Introspection Overivew"

On the heels of Tuesday’s successful VMware IPO, rumors are again circulating that Citrix and XenSource may be hatching an acquisition deal just as the server and desktop virtualization markets are red hot.

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...

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.

A common question is how to compare Fedora [1] and Debian [2] in terms of recent updates and support. I think that Fedora Rawhide and Debian/Unstable are fairly equivalent in this regard, new upstream releases get packaged quickly, and support is minimal. They are both aimed at developers only, but it seems that a reasonable number of people are running servers on Debian/Unstable.