Xen 4.0.3

The Xen 4.0 release contains a number of important new features and updates including:

  • Blktap2 - High performance VHD implementation supporting snaphots and clonces including live snapshots
  • Netchannel2 - Support for new Smart NICs with multi-queue and SR-IOV functionality
  • Fault Tolerance - Live transactional synchronization of VM state between physical servers
  • Libxenlight - New library providing higher-level control of Xen between various toolstacks
  • PV-USB and VGA Pass-through
  • Xen 4.0.x Release Notes
  • Xen 4.0 Datasheet

Xen 4.0.3 is a maintenance release in the 4.0 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 4.0.2 and older 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.

Documents

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

Xen 4.0.3

Xen 4.0.3 (hypervisor and tools) official source distribution

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

Xen 4.0.3 Signature