Issued:
2015-07-22
Updated:
2015-07-22

RHBA-2015:1279 - irqbalance bug fix and enhancement update

Synopsis

irqbalance bug fix and enhancement update

Type/Severity

Bug Fix Advisory

Topic

Updated irqbalance packages that fix several bugs and add various enhancements are now available for Red Hat Enterprise Linux 6.

Description

The irqbalance packages provide a daemon that evenly distributes the interrupt request (IRQ) load across multiple CPUs for enhanced performance.

The irqbalance packages have been upgraded to upstream version 1.0.7, which provides a number of bug fixes and enhancements over the previous version. Notably, irqbalance now works with Xen PV guest, broken deepest cache backport has been fixed, and the IRQ migration algorithm has been enhanced. (BZ#1181720)

This update also fixes the following bugs:

  • Previously, the irqbalance utility did not set signal handlers for particular signals. Consequently, when irqbalance received a signal other than SIGINT or SIGHUP, it terminated without a cleanup. This update provides signal handlers for SIGUSR1, SIGUSR2, and SIGTERM. As a result, irqbalance now stops gracefully after finishing the current balancing iteration. (BZ#1158932)

  • Prior to this update, the /sys/bus/pci/devices file handle was not freed properly if the directory was not available. As a consequence, a memory leak occurred. With this update, the file handle is freed as expected when irqbalance cannot open the directory, and memory leaks no longer occur in the described situation. (BZ#1178247)

Users of irqbalance are advised to upgrade to these updated packages, which fix these bugs and add these enhancements.

Solution

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

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Affected Products

ProductVersionArch
Red Hat Enterprise Linux for Scientific Computing6x86_64
Red Hat Enterprise Linux for Power, big endian6ppc64
Red Hat Enterprise Linux Workstation6x86_64
Red Hat Enterprise Linux Workstation6i386
Red Hat Enterprise Linux Server6x86_64
Red Hat Enterprise Linux Server6i386
Red Hat Enterprise Linux Server from RHUI6x86_64
Red Hat Enterprise Linux Server from RHUI6i386
Red Hat Enterprise Linux Server - Extended Life Cycle Support6x86_64
Red Hat Enterprise Linux Server - Extended Life Cycle Support6i386
Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension6x86_64
Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension6i386
Red Hat Enterprise Linux Desktop6x86_64
Red Hat Enterprise Linux Desktop6i386

Updated Packages

  • irqbalance-debuginfo-1.0.7-5.el6.i686.rpm
  • irqbalance-1.0.7-5.el6.src.rpm
  • irqbalance-1.0.7-5.el6.i686.rpm
  • irqbalance-debuginfo-1.0.7-5.el6.ppc64.rpm
  • irqbalance-1.0.7-5.el6.x86_64.rpm
  • irqbalance-1.0.7-5.el6.ppc64.rpm
  • irqbalance-debuginfo-1.0.7-5.el6.x86_64.rpm

Fixes

CVEs

(none)

References

(none)

Additional information