- Issued:
- 2012-12-04
- Updated:
- 2012-12-04
RHBA-2012:1492 - Bug Fix Advisory
Synopsis
Red Hat Enterprise MRG Realtime 2.2 bug fix update
Type/Severity
Bug Fix Advisory
Red Hat Insights patch analysis
Identify and remediate systems affected by this advisory.
Topic
Updated Red Hat Enterprise MRG Realtime packages that fix several bugs are now
available for Red Hat Enterprise MRG 2.2.
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 rtctl package contains a set of scripts, which are used to manipulate the
scheduling priorities of groups of system threads.
Bug fixes:
- MRG Realtime was using the Red Hat Enterprise Linux kernel as the kdump/kexec
kernel, but this caused problems due to the version differences. With the MRG
Realtime 2.x kernels, the kexec-tools failed to create the initrd image for the
Red Hat Enterprise Linux 6 kdump kernel. MRG Realtime now uses the Realtime
kernel as the kdump/kexec kernel to eliminate the configuration issues between
kernel versions. (BZ#868329, BZ#868442, BZ#868446)
- Due to the way rtctl configuration file selection works, if there was not a
rtgroups configuration file for a specific kernel or for the general kernel
version (for example a 3.2 kernel), the default configuration file was used.
Using the default configuration file could send chrt error message to the
console and some threads could have unusual priorities. This update provides a
per-kernel rtgroups configuration file, which eliminates the chrt error messages
and defines default kthread priorities for each kernel. (BZ#878536)
Users of the real-time capabilities of Red Hat Enterprise MRG 2.2, which is
layered on Red Hat Enterprise Linux 6, 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
- MRG Realtime 2 x86_64
Fixes
- BZ - 878536 - Update rtctl to handle 3.2, 3.4 and 3.6 kernels
CVEs
(none)
MRG Realtime 2
SRPM | |
---|---|
rt-setup-1.50-1.el6rt.src.rpm | SHA-256: 6279c08db6349c48dd8bcd3fe4c38e055cf071df6b28399725401e1be389b420 |
rtctl-1.10-1.el6rt.src.rpm | SHA-256: a4919a212c286bad39d8ea243f8f63ddcacaef2f722e35081773b95093a8a0d5 |
x86_64 | |
rt-setup-1.50-1.el6rt.noarch.rpm | SHA-256: 9054a82a330667552c2aaddc0bc94184048ff28cfbd8b2b17562b24cecead625 |
rtctl-1.10-1.el6rt.noarch.rpm | SHA-256: e375150e51a97ee277ed2c409b6f3393244cf245633be1519ed91ce1ad8a3e32 |
The Red Hat security contact is secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.