Download Xen 4.1

Xen is a “virtual machine hypervisor” for the x86 platform, allowing multiple operating systems to run simultaneously on a single system without drastically impacting performance. For more information about Xen and its community, please refer to this one and this one pages. Currently only Linux and NetBSD are supported as host systems, but work is underway to fully support other operating systems, such as Solaris. The developers have released Xen 4.1 with the following announcement:

[ANNOUNCE] Xen 4.1 released!

The Xen team is pleased to announce the release of Xen 4.1.

The result of nearly 12 months of development, new features include:

• A re-architected and improved XL toolstack replacing XM/XEND
• Prototype credit2 scheduler designed for latency-sensitive workloads and very large systems.
• CPU pools for advanced partitioning.
• Support for large systems (>255 processors)
• Support for x86 Advanced Vector eXtension (AVX).
• New Memory Access API enabling integration of 3rd party security solutions into Xen virtualized environments.
• Many IOMMU fixes (both Intel VT-d IOMMU and AMD IOMMU).
• Many toolstack and buildsystem fixes for Linux and NetBSD hosts.
• Thirdparty libs: libvirt driver for libxl has been merged to upstream libvirt.
• HVM guest PXE boot enhancements, replacing gPXE with iPXE.
• Even better stability through our new automated regression tests.

Detailed release notes, including a more extensive feature list:
http://wiki.xen.org/xenwiki/Xen4.1

To download tarballs:

Or the Mercurial source repository (tag ‘RELEASE-4.1.0’):
http://xenbits.xen.org/xen-unstable.hg

And the announcement on the Xen blog:
http://blog.xen.org/index.php/2011/03/25/xen-4-1-releases/

Thanks to the many people who have contributed to this release!

bye,
The Xen Team