I received my PhD from the University of Michigan in December 2006. I joined XenSource in May of 2006. I've been working on analyzing performance in the Xen hypervisor. I'm currently working on a
Commentary
There has an unusual amount of media attention to XSA-108 during the embargo period (which ended Wednesday) — far more than any of the previous security issues the Xen Project has reported. It began when a blogger complained that Amazon was telling customers it would be rebooting VMs in certain regions
Announcements
We normally only cover news and information directly related to Xen in this channel, but we thought it might be useful to briefly expand our scope a bit to mention the recent discussion about the Docker security exploit. What’s the news? Well to begin with, a few weeks ago
Announcements
I’ve been release coordinator for Xen’s 4.3 and 4.4 releases. For the 4.5 release, I’ve handed this role off to Konrad Wilk, from Oracle. In this blog, I try to capture some of my thoughts and experience about one aspect of release management: deciding
Uncategorized
Xenproject.org is pleased to announce the release of Xen 4.4.0. The release is available from the download page: * Xen 4.4.0: Download, Source (tag RELEASE-4.4.0), release notes. Xen 4.4 is the work of 8 months of development, with 1193 changesets. It’s our
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Today I’d like to talk about a functionality of Xen you may not have heard of, but might have actually used without even knowing it. If you use memory ballooning to resize your guests, you’ve likely used “populate-on-demand” at some point. As you may know, ballooning
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Xenproject.org is pleased to announce the release of Xen 4.3.0. The release is available from the download page: * Xen 4.3.0: Download, Source (tag RELEASE-4.3.0), release notes. Xen 4.3 is the work of just over 9 months of development, with 1362 changesets containing
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Last week the proposed changes to the security policy were approved unanimously by the Xen committers; the policy has been updated accordingly. What this means is that now if you are “public hosting provider”, “vendor of Xen-based system”, or a “distributor of operating systems with Xen support”, regardless of your
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Just a quick update — we have passed the feature freeze, and are now beginning the code freeze, in our schedule to get Xen 4.3 out by mid-June. Is say “beginning the code freeze” because it is still possible to get new code in for a short time now; but
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The following has been posted on the xen-devel and xen-users mailing lists. Executive summary The number of event channels available for dom0 is currently one of the biggest limitations on scaling up the number of VMs which can be created on a single system. There are two alternative implementations we
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At XenSummit in August, I talked about the new planning process that Xen.org is experimenting with. This is apparently a pretty hot topic, as that presentation on slideshare.net has received over 72,000 views! We’re about half-way through the planned 4.3 development cycle, and while I’
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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
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In part 1 of this series, I introduced the concepts of full virtualization and paravirtualization (PV), as well as the hardware virtualization (HVM) feature used by Xen (among other things) to implement full virtualization. I also introduced the concept of installing paravirtualized drivers on a fully virtualized system. This small