Xen will never be part of Linux

Posted by virtualization.info Staff   |   Monday, May 12th, 2008   |  

Recently ZDNet published a skirmish of words between Ian Pratt, Xen founder and chief architect, and Benny Schnaider, CEO of Qumranet (supporting the development of KVM), about the destiny of Xen and the right to be called hypervisor of KVM.

While the debate itself is not too much interesting, one of the reactions that it provoked is much more.

Anthony Liguori, Software Engineer at Linux Technology Center, contributor for both Xen and KVM ( and of Debunking Blue Pill Myth fame), used his personal blog to provide some interesting perspectives of why KVM was preferred over Xen for the integration in the Linux kernel:

Xen is a hypervisor that is based on the Nemesis microkernel. Linux distributions ship Xen today and by default install a Linux guest (known as domain-0) and do their best to hide the fact that Xen is not a part of Linux. They’ve done a good job, most users won’t even notice that they are running an entirely different Operating System. The whole situation is somewhat absurd though. It’s like if the distributions shipped a NetBSD kernel automatically and switched to using it when you wanted to run a LAMP stack. We don’t ship a plethora of purpose-built kernels in a distribution. We ship one kernel and make sure that it works well for all users. That’s what makes a Linux distribution Linux. When you take away the Linux kernel, it’s not Linux any more.

When people talk about Xen not being merged into Linux, I don’t think they realize that Xen will *never* be merged into Linux. Xen will always be a separate, purpose-built kernel. There are patches to Linux that enable it to run well as a guest under Xen. These patches are likely to be merged in the future, but Xen will never been a part of the Linux kernel…


Labels:

blog comments powered by Disqus


virtualization.info Newest articles
Release: VMware Workstation 12 Pro, Player 12, Fusion 8 and Fusion Pro 8

August 25th, 2015

VMware today released version 12 of its type-2 client hypervisor products for Microsoft Windows: Workstation Pro and Player and version 8 of its client hypervisor products for Mac OSX: Fusion….

Release: Veeam Management Pack v8 for System Center

August 25th, 2015

Veeam today released version 8.0 of its Management Pack for Microsoft System Center Operations Manager (SCOM or OpsMgr). Using this Management Pack customers running Operations Manager to monitor vSphere and…

Release: Oracle VM VirtualBox 5.0

August 24th, 2015

Oracle has released version 5.0 of its type-2 virtualization platform VM VirtualBox. Starting with a public beta in April this year and some more test builds and a release candidate…

Microsoft releases 3rd technical preview of Windows Server 2016 and System Center 2016

August 19th, 2015

Microsoft today announced the release of the 3rd technical preview of the next version of its Server Operating System (Windows Server 2016 TP3) and corresponding management software (System Center…

From VirtualizationMatrix comes WhatMatrix – UPDATED

August 19th, 2015

We quoted several times Virtualization Matrix, the website created to compare the capabilities of the various virtualization platforms on the market such VMware, Microsoft and Citrix.
This idea sparked…

Release: Linux Integration Services Version 4.0 for Hyper-V

August 18th, 2015

Microsoft has released version 4.0. of its Integration Services for Linux. Hyper-V supports both emulated (“legacy”) and Hyper-V-specific (“synthetic”) devices for Linux virtual machines. When a Linux virtual machine…

Release: Microsoft Desktop Optimization Pack 2015

August 18th, 2015

Microsoft has released version 2015 of its Desktop Optimization Pack (MDOP), which is available as a paid add-on for Microsoft Customers with Software Assurance. In the 2015 release, the…

Release: Microsoft Deployment Toolkit 2013 Update 1

August 18th, 2015

Microsoft has released version 2013 Update 1 of its Deployment Toolkit. The Microsoft Deployment Toolkit (MDT) is a toolset for automating desktop and server operating system deployments. MDT 2013…

Release: Parallels Access 3.0 with Apple Watch Support Capabilities

August 6th, 2015

On August 5, Parallels announced that it has released an update to Parallels Access app for remote access. The American virtualization technology company has added file sharing support to its…

Citrix CEO Mark Templeton plans to retire

July 30th, 2015

On July 28 Citrix disclosed that Mark Templeton, the company CEO, has plans to retire after over 20 years of service, an unexpected news that drew attention on the next…

Citrix announces Q2 2015 results

July 30th, 2015

Citrix announced its financial results for second quarter 2015.
The revenues for the second quarter were $797 million for an increase of 2% compared to Q2 2014.
Net income was $103…

VMware announces results for Q2 2015

July 24th, 2015

VMware released the results about its results for Q2 2015.
VMware, announced a GAAP total revenue growth of $1.52 billion, for an increase of 4 percent compared to Q2 2014. License revenues…

Gartner releases its 2015 Magic Quadrant for x86 Server Virtualization Infrastructure

July 21st, 2015

Gartner released its Magic Quadrant for x86 Server Virtualization Infrastructure for year 2015, once more positioning VMware and Microsoft in the leaders Quadrant.
No surprises in the leaders quadrant, as…

Release: Parallels Mac Management 4.0 for Microsoft SCCM

July 21st, 2015

Parallels announced the availability of Parallels Mac Management 4.0 for Microsoft System Center Configuration Manager (SCCM), extending its range of capabilities to Mac computers.
This new release increases the flexibility…

 
Monthly Archive