Innovations:

• Defaulted tools now is XL, which replaced xend. It is based on a library of libxl, providing a stable API for XL functions in third party applications. XL is backward compatible with the configuration files xend. Xend itself deprecated.
• Now Xen can run on systems with up to 4095 processors host up to 512 processors on the PV-guest and up to 256 processors on the HVM-guest. The toolbox added the ability to automatically create CPUPOOL for NUMA nodes and more “intelligent” distribution of virtual CPU nodes on NUMA.
• In sub XSM / Flask made numerous improvements, also introduced support for the regime Intel SMEP for DEP hypervisor memory pages from user space.
• Added support for network boot the guest from the boot Xenpvnetboot.
• Improved performance, in particular, support for technology and AMD SVM DecodeAssist modified scheduler.

Also worth noting is that, starting from the branch 4.2, the code for the operation of the project passed to Dom0 QEMU. A similar transfer of the code is also made for projects and SeaBIOS Tianocore / OVMF (UEFI BIOS).

You can download the new version here .

Of new products should be noted:

• Full support for vmware
• A new web tool for simple management infrastructure Self-Service Portal
• Improved interface for managing users and groups
• New network management subsystem
• Data Center Management Policy

To download the available packages for RHEL / CentOS, Debian, openSUSE and Ubuntu

How Stabellini in a notification announced that due to emerging Xen porting for ARM Cortex-A15 architectures on Xen unstable and has been completely rewritten for the latest virtualisation technologies, LPAE, GIC and Generic timer to support the hardware. The developers are already capable of a virtual machine on a Linux system with a 3.0 kernel to execute command line prompt and to emulate an A15-based Versatile Express Developer Board.

Due to its system requirements as LPAE, GIC, is not the Xen port on older ARM architectures. The implementation does not distinguish between PV and HVM guests (paravirtualization and hardware virtual machine) and requires only minimal changes in the Linux kernel, such as supporting the PV driver. After the successful port to the Cortex A15, the developers plan to ensure that other ARMv7 processors with virtualization extensions and ARMv8 processors are supported with 64 bit.

The Xen virtualization solution is sponsored by Citrix, is under the GPL, allowing to run several different guest operating systems on a host system. Total net inflows of more than 1900 changes in the new Xen version.

Among the new features in Xen 1.4 include a redesigned XL-tool stack whose functions are now almost XM / XM XEND same and the sooner long intended to replace or. CPU pools allow sophisticated allocation of the computing power of a host system to its guests. The processing power of the host system can be to split in CPU pools, each with its own scheduler, the virtual machines are specifically assigned. Xen 4.1 supports host systems with more than 255 x86 processors and the Advanced Vector Extensions (AVX). A new memory access API allows to integrate security solutions from different vendors in a virtualized environment.

The CREDIT2 scheduler replaces the future CREDIT1 scheduler. He points to considerably lower latency than its predecessor and is thus suitable for virtualized systems, where performance is important. In CREDIT2 is still a prototype, but was already classified as sufficiently stable.

During the development of the Xen team worked with several Linux distributions, to ensure that the work Xen Dom0 and Xen guest support, without requiring major changes are made to the host systems. As a result, is to install and use Xen can be complicated and as previous versions.