Planet Hypervisor

Future of Xen Project: Video Spotlight Interview with Xen Project’s Chairperson Lars Kurth

Lars Kurth had his first contact with the open source community in 1997 when he worked on various parts of the ARM toolchain. He has since become an open source enthusiasts, worked on several open source communities, and is the chairperson of the Xen Project Advisory Board. He is also the Director of the Xen […]

Debugging Neutron Networking in XenServer

One of the tasks I was assigned was to fix the code preventing XenServer with Neutron from working properly. This configuration used to work well, but the support was broken when more and more changes were made in Neutron, and the lack of a CI environment with XenServer hid the problem. I began getting XenServer with Neutron back to a working state by following the outline in the Quantum with Grizzly blog post from a few years ago. It's important to note that with the Havana release, Quantum was renamed to Neutron, and we'll use Neutron throughout this post. During...

Xen Orchestra 4.13

Welcome to XO 4.13! This one is all about security, stability and fixes, plus UI improvements. One of the major feature is the possibility to use SMB remote for full backups. SMB remotes You can add SMB (ex-CIFS) remotes for your backups. It doesn't work yet with Continuous Delta

Support software freedom now!

Free Software is in a critical state today. Bradley Kuhn recently has made an urgent call for supports of free software to help a campaign to strengthen both the Free Software Foundation and Software Freedom Conservancy, specially given if you donate before January 31st 2016 as your donation will be matched! I've learned the hard way that without such organizations we could be in for a dark age on user software freedoms. No other entity is doing what they do and they are both of critical importance to the community. Because of this I'm not only contributing now but I've...

Training neural network using genetic algorithm

Over the last few years we observed the raise of artificially intelligent applications, which showed almost super-human ability to solve difficult problems. A closer look reveals that deep neural networks is what drives this wave.

Why open hardware must succeed

To the average person open hardware simply sounds like a good idea... They may have heard of this thing called "open source" that some "disruptive" hipster companies may have used and embraced to create new business models, so open source hardware seems like a natural progression. There's more to this though. The average person will not understand why its not just a great idea but also that we are in dire need for open hardware in the industry, the average person will not understand why its vital to the success of the open source movement. The average person will not...

Xen Project 4.4.4 Maintenance Release is Available

I am pleased to announce the release of Xen 4.4.4. Xen Project Maintenance releases are released in line with our Maintenance Release Policy. We recommend that all users of the 4.4 stable series update to this point release. Xen 4.4.4 is available immediately from its git repository:;a=shortlog;h=refs/heads/stable-4.4     (tag RELEASE-4.4.4) or from the Xen Project […]

A New Year, A New Way to Build for XenServer

Building bits of XenServer outside of Citrix has in the past been a bit of a challenging task, requiring careful construction of the build environment to replicate what 'XenBuilder', our internal build system, puts together. This has meant using custom DDK VMs or carefully installing by hand a set of packages taken from one of the XenServer ISOs. With XenServer Dundee, this will be a pain of the past, and making a build environment will be just a 'docker run' away. Part of the work that's being done for XenServer Dundee has been moving things over to using standard build tools...

PV vs PVHVM on next XenServer

Fresh benchmarks comparing PV vs PVHVM mode on XenServer Dundee beta 2.

XSAVE bug discovered for Skylake cpu

At first, serial console put us behind the schedule. As it was very unusual problem due to malfunctioned serial cable. And now some another bug has cost us some very precious time. The anomaly started while I was trying to boot Xen on my system, I found Xen stuck in an infinite loop of the […]