Tuesday Mar 13, 2012

Unbreakable Enterprise Kernel Release 2 has been released

We’re proud to announce the availability of a major enhancement to Oracle Linux: Unbreakable Enterprise Kernel Release 2 (2.6.39) has been released! The RPM packages are now available from the Unbreakable Linux Network and the public yum repositories. This kernel can be installed on both Oracle Linux 5.8 and newer as well as Oracle Linux 6.2 and newer. By simply updating the Unbreakable Enterprise Kernel, Oracle Linux customers can benefit from the latest improvements that have taken place in mainline Linux, without having to re-install their distribution or applications.

This release includes many new features as well as numerous performance and scalability improvements that were added to mainline Linux since the first Unbreakable Enterprise Kernel release (which is based on Linux 2.6.32). Despite the version number, the Unbreakable Enterprise Kernel Release 2 is based on mainline Linux 3.0.16 and includes a few selected patches from other mainline Linux versions. The source code is available from this public git source code repository.

Some key highlights in this release include:

  • Btrfs file system
  • Performance and scalability improvements
  • Virtualization improvements
  • Transparent Huge Pages and Memory compaction
  • Cgroups improvements
  • Linux Containers
  • OCFS2 improvements
  • Updated Device Drivers

For more information, please see the Unbreakable Enterprise Kernel Release 2 features and benefits document and consult the release notes for more For installation instructions, check out the Getting Started with the Unbreakable Enterprise Kernel installation guide on the Oracle Technology Network.

Now that the Unbreakable Enterprise Kernel Release 2 has been released, we will continue to provide support for Release 1 of the Unbreakable Enterprise Kernel (2.6.32) in the form of critical bug fixes and security errata for another 9 months. However, new hardware enablement (e.g. by providing device driver updates) will now only be made available through the quarterly updates of Unbreakable Enterprise Kernel Release 2 on the Unbreakable Linux Network. During this grace period, we encourage all customers to switch to Release 2.

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