We proudly announce that the Xen 4.3 RC-cycle has just started, with the tagging of 4.3.0-rc1 in our repository. Read the official announcement from George on xen-devel here. A tarball…
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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…
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Background and Motivation This blog already hosted a couple of stories about what is going on, in the Xen development community, regarding improving Xen NUMA support. Therefore, if you really…
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As machines are getting more and more powerful today, people want more from the powerful hardware. From a cloud user's perspective, it is better to run more virtual machines on…
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We do some automatic testing of the Xen hypervisor and tools branches. These tests form the "push gate" between the "staging" branch of xen-unstable (and the stable releases) and the…
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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…
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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…
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The Xen community achieved a major milestone last summer when all the necessary components for Xen dom0 support made it into the upstream kernel for the 3.0 release. However, during…
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The Xen Security team recently disclosed a vulnerability, Xen Security Advisory 7 (CVE-2012-0217), which would allow guest administrators to escalate to hypervisor-level privileges. The impact is much wider than Xen;…
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This post written collaboratively by Attilio Rao and George Dunlap Operating systems are generally written assuming that they are in direct control of the hardware. So when we run operating…
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If you are upgrading domain 0 Linux kernel from a non-pvops (classic, 2.6.18/2.6.32/etc.) kernel to a pvops one (3.0 or later), you may find that the amount of free memory…
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On March 18th, Linux 3.3 was released and it featured a number of interesting Xen related features. Re-engineered how tools can perform hypercalls - by using a standard interface (/dev/xen/privcmd…
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Hi everyone! I'm Wei Liu, a graduate student who is pursuing his master's degree from China. If you read posts on blog.xen.org from time to time, you might remember me.…
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We have hit the next milestone in the release plan for Xen 4.2: 19 March — TODO list locked down 2 April — Feature Freeze WE ARE HERE Mid/Late April…
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Since early January I have been tracking the status of work left to do before 4.2 by posting a weekly roundup of the remaining blockers and "nice to haves". You…
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It took me a while to write up my impressions from the first Oracle hosted Hackathon last week: I have to apologize for not being timelier. First, I wanted to…
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Back in november we announced our effort to port Xen to the ARM Cortex-A15 / ARMv7 with virt extensions. I am very pleased to say that as of xen-unstable.hg changeset…
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Dear Xen Developers, I wanted to announce that Ian Campbell from Citrix has been nominated and elected as Xen Hypervisor committer and will be responsible for the ARMv7+VE components in…
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It truly was an amazing year for Xen.org! The key highlights included Dom0 supporting going into mainline Linux kernel, Project Kronos, and renewed focus  Xen for ARM. All three of…
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On October 26th, the Xen Developers will facilitate the first Xen Document Day. This will be an all-day on-line IRC event with the aim to Improve user documentation Improve developer documentation,…
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Dear Xen developers, I wanted to announce that Jan Beulich from Novell has been nominated as Xen Hypervisor committer and confirmed by vote by the other Xen committers, namely Keir…
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One of the fun things about a hackathon is the chance to get everyone together in a room and just talk about crazy ideas you might try at some point…
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As you may know, Fedora 16 will have full Xen support for Dom0 and DomU in it. Fedora is planning a number of test days as part of their release…
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Quite a lot has happened the last few days and I seem to be forever catching up on reporting what is going on, rather than doing this in a timely…
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