Xen 4.1.2

xen 41 banner

The Xen 4.1 release contains a number of important new features and updates including:

  • A re-architected XL toolstack that is functionally nearly equivalent to 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 and 1GB/2MB super page support)
  • Support for x86 Advanced Vector eXtension (AVX)
  • New Memory Access API enabling integration of 3rd party security solutions into Xen virtualized environments
  • Even better stability through our new automated regression tests
  • Xen 4.1 Release Notes
  • Xen 4.1 Datasheet

Xen 4.1.2 is a maintenance release in the 4.1 series and contains:

  • Stability improvements and bug fixes in
    • New XL toolstack
    • Debug support: kexec/kdump
    • Remus (High Availability)
    • Device passthrough to HVM guests
    • Interrupt handling
    • Support for Supervisor Mode Execution Protection (SMEP)

It also contains the Xen 4.1.1 fixes:

  • Security fixes including CVE-2011-1583 and CVE-2011-1898
  • Enhancements to guest introspection (VM single stepping support for very fine-grained access control)
  • Many stability improvements, such as:
    • PV-on-HVM stability fixes (fixing some IRQ issues)
    • XSAVE cpu feature support for PV guests (allows safe use of latest multimedia instructions)
    • RAS fixes for high availability
    • fixes for offlining bad pages
    • changes to libxc, mainly of benefit to libvirt
  • Compatibility fixes for newer Linux guests, newer compilers, some old guest savefiles, newer Python, grub2, some hardware/BIOS bugs.


Created Date Monday, 18 March 2013
Modified Date Friday, 07 April 2017

Xen 4.1.2

Xen 4.1.2 (hypervisor and tools) official source distribution

Created Date Monday, 18 March 2013
Modified Date Friday, 07 April 2017

Xen 4.1.2 Signature