Issued:
2011-07-22
Updated:
2011-07-22

RHBA-2011:1086 - qemu-kvm enhancement update

Synopsis

qemu-kvm enhancement update

Type/Severity

Bug Fix Advisory

Topic

Updated qemu-kvm packages that add an enhancement are now available for Red Hat Enterprise Linux 6.

Description

KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems that is built into the standard Red Hat Enterprise Linux kernel. The qemu-kvm packages form the user-space component for running virtual machines using KVM.

These updated packages add the following enhancement:

  • Due to Linux NFS client issues, the NFS request for the direct vectored I/O operation resulted in splitting a single I/O request into multiple requests, which had a serious impact on performance. The QEMU utility has been modified to detect files that exist in NFS when a request for vectored I/O operation comes to the server, and to use the QEMU_AIO_MISALIGNED flag to force such requests to be handled with a linear buffer. (BZ#720999)

All users of qemu-kvm should upgrade to these updated packages, which add this enhancement. In order for this update to take an effect, all running virtual machines have to be shut down and started again after this update is installed.

Solution

Before applying this update, make sure that all previously-released errata relevant to your system have been applied.

This update is available via Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at This content is not included.https://access.redhat.com/kb/docs/DOC-11259

Affected Products

ProductVersionArch
Red Hat Virtual Storage Appliance (from RHUI)6.1x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support6.1x86_64
Red Hat Enterprise Linux for Scientific Computing6x86_64
Red Hat Enterprise Linux Workstation6x86_64
Red Hat Enterprise Linux Server6x86_64
Red Hat Enterprise Linux Server from RHUI6x86_64
Red Hat Enterprise Linux Server - Extended Update Support from RHUI6.1x86_64
Red Hat Enterprise Linux Server - Extended Life Cycle Support6x86_64
Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension6x86_64
Red Hat Enterprise Linux Desktop6x86_64

Updated Packages

  • qemu-kvm-0.12.1.2-2.160.el6_1.3.src.rpm
  • qemu-kvm-debuginfo-0.12.1.2-2.160.el6_1.3.x86_64.rpm
  • qemu-kvm-tools-0.12.1.2-2.160.el6_1.3.x86_64.rpm
  • qemu-img-0.12.1.2-2.160.el6_1.3.x86_64.rpm
  • qemu-kvm-0.12.1.2-2.160.el6_1.3.x86_64.rpm

Fixes

(none)

CVEs

(none)

References

(none)

Additional information