RHBA-2015:1376 - Bug Fix Advisory

Topic

Updated tuned packages that fix several 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 tuned service did not support direct-access storage devices

(DASDs). As a consequence, DASDs were ignored by tuned and as a result were not
configured. This update adds support for DASDs to tuned, and DASDs are now
properly configured. (BZ#1129936)

• On Red Hat Enterprise Linux 6, the /etc/sysctl.conf file is the default

configuration file for the sysctl tool settings and overrides can be specified
in the /etc/sysctl.d/ directory. The tuned service previously handled the
settings the opposite way, which is common in certain distributions.
Consequently, the configuration specified in /etc/sysctl.d/ could be overridden
by /etc/sysctl.conf. The way tuned handles /etc/sysctl.conf and /etc/sysctl.d/
has been reversed to match the Red Hat Enterprise Linux 6 logic. As a result,
/etc/sysctl.conf is now processed first and can be overridden by settings in
/etc/sysctl.d/. (BZ#1036049)

• Prior to this update, the tuned service did not support Xen Virtual Storage

Devices (XVDs). Consequently, XVDs were ignored by tuned and were not
configured. Support for XVDs has been added to tuned, and XVDs are now properly
configured. (BZ#1159963)

• Previously, the value of the vm.max_map_count sysctl settings was set too low

(1,000,000) in the sap-netweaver tuned profile, which could affect performance.
With this update, vm.max_map_count is set to 2,000,000, which is a value
recommended by SAP documentation. (BZ#1174253)

• Previously, certain files from the tuned packages could be incorrectly

considered to differ from the RPM database. As a consequence, RPM verification
performed by running the "rpm -V tuned" command could fail and it could be
indicated that the files were changed despite not being touched by the user.
This update excludes several attributes, such as size, md5sum, and mtime, from
the verification of the files, and RPM verification no longer fails.
(BZ#1017366)

• Due to a typographical error in the latency-performance profile in the

SYSCTL_POST variable, the /etc/sysctl.d/* files were not processed by the tuned
service. This update fixes the typographical error, and the /etc/sysctl.d/*
files are now correctly processed by tuned. (BZ#1064062)

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.

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 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 for SAP Applications for x86_64 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 6 x86_64
• Red Hat Enterprise Linux for IBM z Systems 6 s390x
• Red Hat Enterprise Linux for SAP Solutions for x86_64 6 x86_64
• Red Hat Enterprise Linux for SAP Solutions for x86_64 - Extended Update Support 6.7 x86_64
• Red Hat Enterprise Linux for SAP Applications for x86_64 - Extended Update Support 6.7 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 6 s390x
• Red Hat Enterprise Linux for SAP Applications for x86_64 - Extended Life Cycle Support 6 x86_64
• Red Hat Enterprise Linux for SAP Solutions for x86_64 - Extended Life Cycle Support 6 x86_64
• 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
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension (for IBM z Systems) 6 s390x
• Red Hat Enterprise Linux for SAP Applications for x86_64 - Extended Life Cycle Support Extension 6 x86_64
• Red Hat Enterprise Linux for SAP Solutions for x86_64 - Extended Life Cycle Support Extension 6 x86_64

Fixes

• BZ - 1017366 - rpm verify of tuned package fails
• BZ - 1036049 - [tuned] SYSCTL_POST="/etc/sysctl.d/* /etc/sysctl.conf" should be reversed
• BZ - 1064062 - latency-performance has typo in SYSCTL_POST variable
• BZ - 1174253 - [SAP] tuned-profiles-sap sets incorrect vm.max_map_count

CVEs

(none)

References

(none)