Oracle Linux 7 Update 5 Released, Offering Two Kernel Options & Still Supporting Btrfs
Oracle Linux 7 Update 5 ships with Oracle's own Unbreakable Enterprise Kernel 4, which is based on the Linux 4.1 LTS kernel series. Oracle has been working on the Unbreakable Enterprise Kernel 5 that is rebased against Linux 4.14 LTS, but this Oracle Linux 7 Update 5 release is defaulting to the proven UEK4 build.
With their UEK kernel, Oracle says they are still supporting the Btrfs file-system even though Red Hat has deprecated Btrfs support and will be removing the support completely with RHEL8.
More details on Oracle Linux 7 Update 5 can be found via today's release announcement.