Xen Project (XAPI)

What is Valgrind? Valgrind is a framework for building dynamic analysis tools. Several useful tools are included in the Valgrind distribution including tools to check dynamic memory usage (memcheck), a cache profiler (cachegrind), heap profiler ... [More] (massif) and thread debugger (helgrind) among others. Valgrind also provides a framework which can be used to build other tools. [...] [Less]

The OpenMirage project is seeking to become a Xen.org hosted project, as defined in the Xen Governance process. To become a Xen.org hosted project, a project proposal is needed that is first submitted for community review. The review is followed by a vote by eligible community members, which if successfull adds the project to the [...]

It’s almost 2013! Time to complete our review of 2012. In the first part of this article, we looked at the progress the Xen community made in terms of Governance, Community Diversity, Event Presence and covered cool Xen features that will land in 2013. In this article we will look at some negatives, a review [...]

It is the time of the year, when it is worth looking back and assess how we have done. For me, 2012 has been an exciting year with many positive changes in the Xen community. Not everything, I wanted to achieve has been achieved, but all in all we managed to make excellent progress in [...]

I am pleased to announce the release of Xen 4.2.1 and Xen 4.1.4. These are available immediately from the following locations Xen 4.2.1: mercurial repository (tag RELEASE-4.2.1) or via the Xen 4.2.1 download page on xen.org. Xen 4.1.4: mercurial ... [More] repository (tag RELEASE-4.1.4) or via the Xen 4.1.4 download page on xen.org. We recommend that all [...] [Less]

After concluding our poll about changes to the security discussion, we determined that “Pre-disclosure to software vendors and a wide set of users” was probably the best fit for the community. A set of concrete changes to the policy have now been discussed on xen-devel (here and here), and we seem to have converged on [...]

The “Normal” Case To explain what is a Stub-Domain (often called stubdom), let’s start with the basics. When you start a new guest with Xen, you would need a Device Model which does some emulation if the guest does not have PV drivers. This is the case for an HVM domain. This device model (which [...]

Xen.org is happy to announce that XCP 1.6 has been released! The release is available from the download page: XCP 1.6: Download (Xapi source) New features and Improvements XCP 1.6 has many new features and improvements, most notably Storage ... [More] XenMotion, Live VDI Migration, improved integration with XenCenter, many Networking Enhancements including massive VLAN scalability improvements. [...] [Less]

The blkback/blkfront drivers developed by the original Xen team was lightweight and fast zero-copy protocol that has served well for many years. However, as the number of physical cores and the number of guests have increased on systems, we have ... [More] begun to identify some bottlenecks to scalability. This prompted a recent improvement to the protocol, [...] [Less]

A couple of weeks ago I went to Copenhagen to attend Linaro Connect and Ubuntu Developer Summit for the first time. I was really impressed by the size of the conference, I wasn’t expecting so many people, it certainly rivals LinuxCon in terms of attendance. All the best minds in the ARM world together in [...]