Heise Online reports that Xen 3.3 is now available and ready for download:
The new version 3.3.0 of the free virtualisation solution Xen has a number of revamped features and is now available to download. The new version is also available as part of a package with a 2.6.18 kernel version of Linux as the host system, also known as Domain 0 (Dom0). Xen calls guest systems user domains (DomU). According to Xen developers, the number of supported guest operating systems has grown and there are improvements in performance, the ACPI power management modes, and security functions such as using PVGrub instead of PYGrub. Xen 3.3.0 also has fewer limitations on moving running virtual machines from one physical system to another. This function, necessary for redundant fail over configurations and practical for server maintenance, has previously only been usable when the processors (and chipsets) running on the physical machines involved supported very similar hardware virtualisation functions.
This release contains architectural improvements and new user-visible features including:
- Power management (P & C states) in the hypervisor
- HVM emulation domains (qemu-on-minios) for better scalability, performance and security
- PVGrub: boot PV kernels using real GRUB inside the PV domain
- Better PV performance: domain lock removed from pagetable-update paths
- Shadow3: optimisations to make this the best shadow pagetable algorithm yet, making HVM performance better than ever
- Hardware Assisted Paging enhancements: 2MB page support for better TLB locality
- CPUID feature levelling: allows safe domain migration across systems with different CPU models
- PVSCSI drivers for SCSI access direct into PV guests
- HVM framebuffer optimisations: scan for framebuffer updates more efficiently
- Device passthrough enhancements
- Full x86 real-mode emulation for HVM guests on Intel VT: supports a much wider range of legacy guest OSes
- New qemu merge with upstream development
- Many other changes in both x86 and IA64 ports
Download Xen 3.3.
The following hardware configurations have been tested with Xen 3.1 using the Xen 3.1 Test CD. Please run the test CD
on your hardware to help us grow the list and identify platforms that need attention.