RHBA-2013:0538 - Bug Fix Advisory

Topic

Updated tuned packages that fix two bugs are now available for Red Hat
Enterprise Linux 6.

Description

The tuned packages contain a daemon that tunes system settings dynamically. It
does so by monitoring the usage of several system components periodically.

This update fixes the following bugs:

• Previously, the ktune service did not save readahead values. On startup, it

multiplied the current value by a constant and divided the value by the same
constant on stop. This could result in a wrong value being set on devices that
were added after ktune had been started. Now, the previous readahead values are
stored for all devices and the correct values are restored on ktune stop.
(BZ#907856)

• Previously, when multiple devices were added into the system, a udev rule

restarted ktune for each new device. This could lead to many restarts in a short
period of time. The multiple restarts could trigger a race condition in the
kernel, which cannot be currently fixed. The tuned daemon code has been modified
not to trigger more than one restart per 10 seconds, thus preventing the race
condition from occurring. (BZ#907768)

Users of tuned are advised to upgrade to these updated packages, which fix these
bugs.

Solution

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

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/knowledge/articles/11258

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Server 6 i386
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 6.4 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 6.4 i386
• Red Hat Enterprise Linux Server - AUS 6.4 x86_64
• 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 IBM z Systems 6 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 6.4 s390x
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 6.4 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 Update Support from RHUI 6.4 x86_64
• Red Hat Enterprise Linux Server - Extended Update Support from RHUI 6.4 i386
• Red Hat Gluster Storage Server for On-premise 2.1 x86_64
• Red Hat Storage for Public Cloud (via RHUI) 2.1 x86_64
• 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 for Power, big endian 6 ppc64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 6 s390x

Fixes

CVEs

(none)

References

(none)