RHBA-2009:1265 - Bug Fix Advisory

Topic

An updated irqbalance package that fixes various bugs is now available.

Description

irqbalance is a daemon that evenly distributes IRQ load across multiple
CPUs for enhanced performance.

This updated package addresses several minor bugs:

• multiple instances of irqbalance could be started when changing between

run levels. A universal exit is now run on existing instances so that only
one will operate at a time. (BZ#471574)

• several errors in set_interrupt_count and investigate interaction caused

irqbalance to ignore IRQBALANCE_BANNED_INTERRUPTS. The two now work
discretely and the problem no longer presents. (BZ#479459)

• documentation has been improved in order to clarify the meaning and use

of some of the configuration settings in irqbalance. (BZ#479856)

Users are advised to upgrade to this updated irqbalance package, which
resolves these issues.

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
http://kbase.redhat.com/faq/docs/DOC-11259

Affected Products

• Red Hat Enterprise Linux Server 5 x86_64
• Red Hat Enterprise Linux Server 5 ia64
• Red Hat Enterprise Linux Server 5 i386
• Red Hat Enterprise Linux Workstation 5 x86_64
• Red Hat Enterprise Linux Workstation 5 i386
• Red Hat Enterprise Linux Desktop 5 x86_64
• Red Hat Enterprise Linux Desktop 5 i386
• Red Hat Enterprise Linux for Power, big endian 5 ppc
• Red Hat Enterprise Linux Server from RHUI 5 x86_64
• Red Hat Enterprise Linux Server from RHUI 5 i386

Fixes

• BZ - 471574 - changing runlevel starts additional irqbalancers
• BZ - 479856 - Document use of IRQBALANCE_BANNED_INTERRUPTS and give examples for it and for IRQBALANCE_BANNED_CPUS

CVEs

(none)

References

(none)