RHBA-2014:0105 - Bug Fix Advisory

Topic

Updated Red Hat Enterprise MRG Realtime packages that fix several bugs are now
available for Red Hat Enterprise MRG 2.4.

Description

Red Hat Enterprise MRG (Messaging, Realtime, and Grid) is a next-generation IT
infrastructure for enterprise computing. MRG offers increased performance,
reliability, interoperability, and faster computing for enterprise customers.

MRG Realtime provides the highest levels of predictability for consistent
low-latency response times to meet the needs of time sensitive workloads. MRG
Realtime provides new levels of determinism by optimizing lengthy kernel code
paths to ensure that they do not become bottlenecks. This allows for better
prioritization of applications, resulting in consistent, predictable response
times for high-priority applications.

This update provides bug fixes for the following packages:

• The rt-setup package configures settings required by the Red Hat Enterprise

Linux real-time environment, such as creating the realtime group, adding
realtime user privileges to PAM (Pluggable Authentication Models), enabling the
configuration of kdump in real time, and disabling irqbalance by default.

• The libibverbs-rocee packages provide a library to enable userspace processes

to use RDMA over Converged Ethernet (RoCE) "verbs" acording to the InfiniBand
Architecture Specification and the RoCE Protocol Verbs Specification.

• The libmlx4-rocee packages provide a device-specific driver for Mellanox

ConnectX InfiniBand host channel adapters (HCAs) for the libibverbs-rocee
library.

Bug Fixes:

Users of the real-time capabilities of Red Hat Enterprise MRG 2.4, which is
layered on Red Hat Enterprise Linux 6, are advised to upgrade to these updated
packages, which fix these bugs.

• The mrg-rt-release package was originally created as a sub-package of the

kernel-rt package and had the same version number of the kernel. As our MRG
Realtime customers tend to have multiple kernel versions installed (including
older ones), it was possible that older versions of the mrg-rt-release package
could conflict with newer ones due to kernel requirements. To address this, a
new script was added to the rt-setup package making it independent of the kernel
version. This new script in the rt-setup package will create the
/etc/mrg-rt-release file at boot based on the running kernel version thus
avoiding the conflict with using the mrg-rt-release package. (BZ#848433)

• With this update, MRG Realtime provides updates to the latest versions of the

libibverbs-rocee and libmlx4-rocee packages that provide high performance
networking. (BZ#1026944)

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

• MRG Realtime 2 x86_64

Fixes

• BZ - 1026944 - update libmlx4-rocee and libibverbs-rocee packages

CVEs

(none)

References

(none)