The following is a summary of the features, changes, and improvements that are introduced in UEK R7, relative to UEK R6:

• Linux 5.15 stable kernel base

  The 5.15.0 mainline kernel release that is used as the base kernel for UEK R7 includes many upstream kernel features and improvements over previous UEK releases and over RHCK. For a listing of the major new features and enhancements that are introduced in this kernel, see Core Kernel Features and Functionality.

• 64-bit Arm (aarch64) support

  This release provides improved support for the 64-bit Arm (aarch64) platform. One significant change for the Arm platform is that the default page size has changed to 4 KB, from the previous 64 KB default. The new 4 KB size pairs well with the workloads and memory amounts that exist on the majority of Arm-based systems. See Default Page Size on Arm Platform Changed to 4 KB for more detailed information about this notable change.

• DTrace v2.0

  Dtrace v2.0 continues to be available in UEK R7 and leverages kernel tracing facilities like eBPF. Detailed information about DTrace releases and other notable changes are available at Oracle Linux: DTrace Release Notes.

• File systems support

  Support for the Btrfs and OCFS2 file systems is enabled in UEK R7. The XFS and NFS file systems have also been enhanced in this release. For more information about new file systems features that are introduced in UEK R7, see File Systems.