Issued:
2012-03-21
Updated:
2012-05-16

RHBA-2012:0398 - kvm bug fix update

Synopsis

kvm bug fix update

Type/Severity

Bug Fix Advisory

Topic

Updated kvm packages that fix one bug are now available for Red Hat Enterprise Linux 5.

Description

[Updated 16 May 2012] This advisory has been updated with the correct description for bug 802429. The packages included in this revised update have not been changed in any way from the packages included in the original advisory.

KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. KVM is a Linux kernel module built for the standard Red Hat Enterprise Linux kernel.

This update fixes the following bug:

  • An accounting error in the I/O thread subsystem in QEMU could, under certain circumstances, lead to I/O stalls on the guest. This would typically cause the guest to become unresponsive. With this update, the accounting error has been corrected, and I/O stalls no longer occur in this scenario. (BZ#802429)

All users of kvm are advised to upgrade to these updated packages, which fix this bug. Note that the procedure in the Solution section must be performed before this update will take effect.

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

The following procedure must be performed before this update will take effect:

  1. Stop all KVM guest virtual machines.

  2. Either reboot the hypervisor machine or, as the root user, remove (using "modprobe -r [module]") and reload (using "modprobe [module]") all of the following modules which are currently running (determined using "lsmod"): kvm, ksm, kvm-intel or kvm-amd.

  3. Restart the KVM guest virtual machines.

Affected Products

ProductVersionArch
Red Hat Enterprise Linux Workstation5x86_64
Red Hat Enterprise Linux Server5x86_64

Updated Packages

  • kvm-qemu-img-83-249.el5_8.x86_64.rpm
  • kvm-83-249.el5_8.x86_64.rpm
  • kmod-kvm-debug-83-249.el5_8.x86_64.rpm
  • kvm-debuginfo-83-249.el5_8.x86_64.rpm
  • kvm-83-249.el5_8.src.rpm
  • kmod-kvm-83-249.el5_8.x86_64.rpm
  • kvm-tools-83-249.el5_8.x86_64.rpm

Fixes

(none)

CVEs

(none)

References

(none)

Additional information