There's been a lot of good progress in the Xen on ARM with virtualisation extensions port since I first blogged about it here. Thanks to some recent work, mainly by…
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Xen.org is pleased to announce the release of Xen 4.0.4 and 4.1.3. These are available immediately from the download pages Xen Hypervisor 4.1.3: Download (archives), Source (tag RELEASE-4.1.3) Xen Hypervisor…
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As promised, here is the poll for the security discussion. As a reminder, the purpose of this poll is mainly to see where people's attitudes are with respect to the…
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It is time again for the XenSummit North America, which will start in 3 weeks. This year, XenSummit is conveniently co-located with CloudOpen and LinuxCon. If you use open source…
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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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Last week we finally crossed the last major remaining issues off the Xen 4.2 TODO list. This means that the release plan now looks like this: 19 March — TODO…
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We now have PCI passthrough support in QEMU upstream, this was one of the missing pieces needed to have a full featured QEMU device model. But there is still more…
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All of this week Ian Jackson and myself have been have been attending DebConf12 in Managua, Nicaragua. This is the annual conference of the Debian Project, hosted this year by…
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I have just published the XenSummit event agenda. We will have 30 talks in two tracks this year. And the line-up this year looks fantastic! Check it out.
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It's been a while since the last 4.2 release update and a lot has changed since then, so I suppose it is time for another update. Way back at the…
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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 is a guest blog post by Georg Dörn, a long-time system administrator and open source enthusiast. Georg founded his company its-doern in 2008, to develop solutions for customers entirely…
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Just a quick reminder that, the CFP for XenSummit closes in a week and that all submissions must be received before midnight June 15, 2012 PDT. Suggested topics include: Latest…
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One of the goals for the 4.2 release is for xl to have feature parity with xm for the most important functions. But along the way, we've also been adding…
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Over the past few months we have been working on improving the API for the libxl library. libxl is to become the base layer for all Xen toolstacks. We intend…
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Where were we? So, here it is what we said up to now. Basically: NUMA is becoming increasingly common; properly dealing with NUMA is important for performance; one can tweak…
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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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Canonical’s release of Ubuntu Server 12.04 LTS now includes support for the Xen Hypervisor (version 4.1.2), Xen Cloud Platform (XCP) packages and XCP OpenStack plug-ins. The inclusion of the Xen…
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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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Yes, no matter whether big or small NUMA piece of hardware, the Xen.org community is staring at you right in the eyes, and we will get the best out of…
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A quick round-up of Xen events in May and an update on Xen Summit in August: for more information see the Xen Events page. Xen @ Ubuntu Developer Summit, May…
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Among the more unique features of Xen 4.2 is a feature called cpupools, designed and implemented by Jürgen Groß at Fujitsu. At its core it's a simple idea, but one…
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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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Xen 4.2 will contain two new scheduling parameters for the credit1 scheduler which significantly increase its confurability and performance for cloud-based workloads: timeslice_ms and ratelimit_us. This blog post describes what…
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Today, Citrix and the Apache Software Foundation (ASF) announced that it will relicense the CloudStack open source project under the Apache License and contribute the CloudStack code to the ASF.…
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