- Issued:
- 2011-06-23
- Updated:
- 2011-06-23
RHEA-2011:0895 - Product Enhancement Advisory
Synopsis
Red Hat Enterprise MRG Realtime 2.0 Release
Type/Severity
Product Enhancement Advisory
Red Hat Insights patch analysis
Identify and remediate systems affected by this advisory.
Topic
Updated kernel-rt packages that add various enhancements are now available for
Red Hat Enterprise MRG 2.0.
Description
The kernel-rt packages contain the Linux kernel, the core of any Linux operating
system.
This update provides a build of the kernel-rt packages for MRG 2.0, which is
layered on Red Hat Enterprise Linux 6, and adds the following enhancements:
- Due to changes in the /sys virtual file system layout, the Red Hat Enterprise
Linux 6 user space assumes different kernel behavior. To allow various scripts
and udev for Red Hat Enterprise Linux 6 to work properly with the Red Hat
Enterprise MRG Realtime kernel, the "CONFIG_SYSFS_DEPRECATED*" configuration
options in the Red Hat Enterprise MRG Realtime kernel have been turned off.
(BZ#666951)
- The startup scripts and services on Red Hat Enterprise Linux 6 assume new
kernel behavior, which required several configuration setting changes in the Red
Hat Enterprise MRG Realtime kernel. With this update, the "CGROUP" and "KSM"
configuration options were turned on, and the "SYSFS_DEPRECATED_V2" option was
turned off. This allows the Red Hat Enterprise MRG Realtime kernel to boot
properly in the Red Hat Enterprise Linux 6 user space. (BZ#667440)
- When using the Red Hat Enterprise MRG Realtime kernel, application scaling was
limited, because a single spinlock (that is, "idr_lock") was used to access the
POSIX timer structures. This update converts the spinlock to the
read-copy-update (RCU) protocol, which allows parallel access to the POSIX timer
structures and enhances scalability. (BZ#705582)
Users of the Realtime capabilities of Red Hat Enterprise MRG 2.0, which is
layered on Red Hat Enterprise Linux 6, are advised to upgrade to these updated
packages, which add these enhancements. Note that the system must be rebooted
for this update to take effect.
Solution
Before applying this update, make sure that all previously-released errata
relevant to your system have been applied.
This update is available via Red Hat Network. Details on how to use the Red
Hat Network to apply this update are available at
https://access.redhat.com/kb/docs/DOC-11259
Affected Products
- MRG Realtime 2 x86_64
Fixes
- BZ - 667440 - unify kernel config options for MRG 2.0 (both RHEL5 and RHEL6 hosts)
CVEs
(none)
References
(none)
MRG Realtime 2
SRPM | |
---|---|
kernel-rt-2.6.33.9-rt31.66.el6rt.src.rpm | SHA-256: 1ee2cf9807a474292f06947caf58161b6a995699f6f4bc9ff3a44e4f82e8ea04 |
x86_64 | |
kernel-rt-2.6.33.9-rt31.66.el6rt.x86_64.rpm | SHA-256: f5d1915ef4b97f667f3f9b683bf3758ebec1e91cc67fedc2affe367bbe31a137 |
kernel-rt-debug-2.6.33.9-rt31.66.el6rt.x86_64.rpm | SHA-256: e349c0e31a5cc63c5c412517d5aa8e1ebb9ebec0aaf0adce97379b3f30481c53 |
kernel-rt-debug-debuginfo-2.6.33.9-rt31.66.el6rt.x86_64.rpm | SHA-256: ffa63121a3a8c37f929a5f8019c68b3c27098da624bddb064f5e4fe55a7642e4 |
kernel-rt-debug-devel-2.6.33.9-rt31.66.el6rt.x86_64.rpm | SHA-256: a47dfc7ecdc5ff7064b9bc378bd53e500a81ce657e2934b48efa774da98f102c |
kernel-rt-debuginfo-2.6.33.9-rt31.66.el6rt.x86_64.rpm | SHA-256: 40c93f380d9f4bc755e0df36e6e28b1baec3d7d89c888e791b0867f0093a2a4e |
kernel-rt-debuginfo-common-x86_64-2.6.33.9-rt31.66.el6rt.x86_64.rpm | SHA-256: 6e160442f420d3e541b905f406c0200dd94382ced6b0a0a7526a118cfa4c4466 |
kernel-rt-devel-2.6.33.9-rt31.66.el6rt.x86_64.rpm | SHA-256: cb0689948874cd67dfa475ddeda9cc718a0a44114df80354237fa58d84e437a3 |
kernel-rt-doc-2.6.33.9-rt31.66.el6rt.noarch.rpm | SHA-256: 53eb3fb74457f262044e231f71ffc621b1f2c62e8436ef7eb2ae82108f1f3ce0 |
kernel-rt-firmware-2.6.33.9-rt31.66.el6rt.noarch.rpm | SHA-256: 7174e53c7db72f754391da9d82f438d70256ba6ca02761b878954edab70a3b6c |
kernel-rt-trace-2.6.33.9-rt31.66.el6rt.x86_64.rpm | SHA-256: 729b002d7f387730ce83603f506c0c99498db1db1c260c982e576a33b4de6550 |
kernel-rt-trace-debuginfo-2.6.33.9-rt31.66.el6rt.x86_64.rpm | SHA-256: d663cd37b29beb11adf9edf7f4f254b48f2dd2878da033b77af837ec6e1aff0c |
kernel-rt-trace-devel-2.6.33.9-rt31.66.el6rt.x86_64.rpm | SHA-256: 116a4a6357218ceae11f1ffd80fc7fc3f662a92b52408b7d318f3d8fb5c42f0a |
kernel-rt-vanilla-2.6.33.9-rt31.66.el6rt.x86_64.rpm | SHA-256: e0370224beca9f3c526cf29a62125d1675488fafb70af7f691852f5447a22dca |
kernel-rt-vanilla-debuginfo-2.6.33.9-rt31.66.el6rt.x86_64.rpm | SHA-256: 7c2d1236050800d6ecfaa624e626f9f3bd3b05b816145bc553db8a3968fa75a4 |
kernel-rt-vanilla-devel-2.6.33.9-rt31.66.el6rt.x86_64.rpm | SHA-256: 58b16370f74fcac724ad6edff37a63032b831246125b8901ef4781b6508e0ac6 |
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