Issued:
2009-04-15
Updated:
2009-09-02

RHBA-2009:0424 - cpuspeed bug fix update

Synopsis

cpuspeed bug fix update

Type/Severity

Bug Fix Advisory

Topic

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

Description

The cpuspeed package provides CPU frequency scaling support.

This updated package fixes the following bugs:

  • the cpuspeed init script loaded the speedstep-centrino driver on Intel systems, even when the acpi-cpufreq driver had already loaded successfully. With both these drivers loaded, the system would not handle P-states correctly. The cpuspeed init script now attempts to load the speedstep-centrino driver only as a fallback for situations where it has not been able to load the acpi-cpufreq driver. Intel systems that can use the acpi-cpufreq driver no longer load the speedstep-centrino driver, and now handle P-states correctly. (BZ#485480)

  • a development version of this package attempted to make cpuspeed run reliably on Xen kernels by only allowing cpuspeed to start on Xen kernels if the number of virtual CPUs in dom0 equalled the number of physical CPUs in the system. However, this condition can never be true until xend starts, and xend starts after cpuspeed. Therefore, cpuspeed would only run properly on Xen kernels if cpuspeed were restarted after the system completed the boot process. The restriction that cpuspeed can only start if the number of virtual and physical kernels are equal has therefore been removed, allowing cpuspeed to start on Xen kernels even when xend has not yet started. (BZ#488924, BZ#498406, BZ#492139)

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

Affected Products

ProductVersionArch
Red Hat Enterprise Linux for Power, big endian5ppc
Red Hat Enterprise Linux Workstation5x86_64
Red Hat Enterprise Linux Workstation5i386
Red Hat Enterprise Linux Server5x86_64
Red Hat Enterprise Linux Server5ia64
Red Hat Enterprise Linux Server5i386
Red Hat Enterprise Linux Server from RHUI5x86_64
Red Hat Enterprise Linux Server from RHUI5i386
Red Hat Enterprise Linux Desktop5x86_64
Red Hat Enterprise Linux Desktop5i386

Updated Packages

  • cpuspeed-1.2.1-8.el5.x86_64.rpm
  • cpuspeed-1.2.1-8.el5.src.rpm
  • cpuspeed-1.2.1-8.el5.ppc.rpm
  • cpuspeed-1.2.1-7.el5.src.rpm
  • cpuspeed-1.2.1-7.el5.i386.rpm
  • cpuspeed-1.2.1-8.el5.i386.rpm
  • cpuspeed-1.2.1-7.el5.ppc.rpm
  • cpuspeed-1.2.1-7.el5.ia64.rpm
  • cpuspeed-1.2.1-7.el5.x86_64.rpm
  • cpuspeed-1.2.1-8.el5.ia64.rpm

Fixes

CVEs

(none)

References

(none)

Additional information