* 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.
It uses -nostdinc and tries to use #include <stdarg.h> through
a local copy of stdarg.h, which can't work.
Fixed this by putting the relevant builtin stdarg definitions for
NetBSD in the local copy.
guests operating systems on a single machine. Guest OSes (also called "domains"
)
require a modified kernel which supports Xen hypercalls in replacement
to access to the physical hardware. At boot, the xen kernel is loaded
along with the guest kernel for the first domain (called domain0).
domain0 has privileges to access the physical hardware (PCI
and ISA devices), administrate other domains and provide virtual
devices (disks and network) to other domains.
This package contains the Xen4 kernel itself.
Release notes:
The Xen team is pleased to announce the release of Xen 4.1.
The result of nearly 12 months of development, new features include:
* A re-architected and improved XL toolstack replacing 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)
* Support for x86 Advanced Vector eXtension (AVX).
* New Memory Access API enabling integration of 3rd party security
solutions into Xen virtualized environments.
* Many IOMMU fixes (both Intel VT-d IOMMU and AMD IOMMU).
* Many toolstack and buildsystem fixes for Linux and NetBSD hosts.
* Thirdparty libs: libvirt driver for libxl has been merged to upstream
libvirt.
* HVM guest PXE boot enhancements, replacing gPXE with iPXE.
* Even better stability through our new automated regression tests.
Detailed release notes, including a more extensive feature list:
http://wiki.xen.org/xenwiki/Xen4.1
To download tarballs:
http://xen.org/products/xen_source.html
Or the Mercurial source repository (tag 'RELEASE-4.1.0'):
http://xenbits.xen.org/xen-unstable.hg
And the announcement on the Xen blog:
http://blog.xen.org/index.php/2011/03/25/xen-4-1-releases/
Thanks to the many people who have contributed to this release!
Regards,
The Xen Team
