Log Message:
Xen 4.1.1 (maintenance release)

 *   Security fixes including CVE-2011-1583 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 and 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.