Hi all, I'm pleased to announce a Xen paravirt_ops kernel available for testing at http://xenbits.xensource.com/ext/paravirt_ops/. These kernels are based on this morning's 2.6.21, along with all the paravirt_ops + Xen patches. The pre-built i386 kernel RPM is based on the FC6 configuration, and it has both Xen and VMI paravirt_ops support enabled. Unfortunately the RPM is a bit rough, and you'll need to generate an initrd and update your boot-loader to make it bootable. To boot under Xen, use /boot/vmlinux-.gz as the kernel image. This is definitely a testing snapshot release, but it has had a bit of testing. I've been using it running native on my main work machine, and it behaves exactly like a non-paravirt kernel. It has also been tested under Xen on XenRT, XenSource's automated testing infrastructure, where it passes almost everything. There are a couple of expected BUG messages which appear on boot: one in init_sched_clock, and one in xen_apic_read. Both are harmless warning messages, and will be removed shortly. (However, if you see more than one xen_apic_read warning, please send me the details along with your kernel config.) Please see the RELEASE*.txt for release notes. J