Oracle Linux Support (formerly known as the Oracle Unbreakable Enterprise Kernel for Linux) is a kernel that is installed by default on Oracle Linux and can be installed on RHEL 6.6 and 7.0. This kernel is based on the 2.6.32 Linux kernel and includes optimizations developed by Oracle to ensure stability and optimal performance.
The Oracle Linux Support kernel installs directly on Oracle Linux 6.6 (by default) and on RHEL 6.6, so there is no need to upgrade to a new major release of the Linux OS to gain the benefits and features of this kernel. After you have installed this kernel, you still have the option of easily switching back to the Red Hat-compatible kernel.
For more information about Oracle Unbreakable Enterprise Linux, go to: http://www.oracle.com/us/technologies/linux/ubreakable-enterprise-kernel-linux-173350.html