RHBA-2015:1440 - Bug Fix Advisory

Topic

Updated cpuspeed packages that fix one bug are now available for Red Hat
Enterprise Linux 6.

Description

The cpuspeed packages contain a daemon that dynamically changes the speed of
processors depending upon their current workload. These packages also allow
users to enable CPU frequency scaling using in-kernel CPUfreq governors on Intel
Centrino, AMD Athlon 64, and AMD Opteron platforms.

This update fixes the following bug:

• A previous update brought in a change in the kernel introducing the

intel_pstate driver, incompatible with how scaling was managed until Red Hat
Enterprise Linux 6.7. Consequently, the cpuspeed service printed needless error
messages during system boot and shutdown. With this update, platforms using
intel_pstate support only the "performance" and "powersave" scaling governors,
the default option and default state being "powersave". If the user has set a
different governor from the above-mentioned, for example "ondemand" or
"conservative", they have to edit the configuration and choose one from the two,
"powersave" or "performance". In addition, needless error messages are no longer
returned. (BZ#1196755, BZ#1211828, BZ#1219780, BZ#1225024)

Users of cpuspeed are advised to upgrade to these updated packages, which fix
this bug.

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

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Server 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 i386
• Red Hat Enterprise Linux Workstation 6 x86_64
• Red Hat Enterprise Linux Workstation 6 i386
• Red Hat Enterprise Linux Desktop 6 x86_64
• Red Hat Enterprise Linux Desktop 6 i386
• Red Hat Enterprise Linux for Power, big endian 6 ppc64
• Red Hat Enterprise Linux for Scientific Computing 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 i386

Fixes

• BZ - 1225024 - [RHEL-6.7-Snapshot-1] cpuspeed reports error while booting into OS.

CVEs

(none)

References

(none)