Oracle Releases UEK R6U2 Kernel With New Slab Memory Controller

Written by Michael Larabel in Oracle on 31 March 2021 at 06:45 PM EDT. 5 Comments
Oracle continues advancing their "Unbreakable Enterprise Kernel" as the company's modified Linux kernel build offered to Oracle Linux users as an alternative to its Red Hat Compatible Kernel for their RHEL-based OS. Unbreakable Enterprise Kernel 6 Update 2 is out to end Q1'2021 with various new features.

Oracle's Unbreakable Enterprise Kernel Release 6 continues to be based on the upstream Linux 5.4 LTS kernel series rather than Linux 4.18 as found in the RHEL8 and Oracle's "Red Hat Compatible Kernel" (RHCK) offering. UEK R6U2 adds in the new slab memory controller proposed last year that can provide major savings on slab memory use. R6U2 also has NVMe storage improvements and a number of improvements to Linux file-systems like Btrfs, EXT4, and XFS. This kernel also back-ports the vDPA driver for the Mellanox ConnectX-6 Dx devices. There are also updated storage device and network drivers for code they previously back-ported to their UEK kernel.

Building off work introduced previously in Unbreakable Enterprise Kernel 6, this second update also improves their core scheduling code, updates their WireGuard implementation, and furthers along the NFSv4.2 server-side copy abilities.

More details on the Unbreakable Enterprise Kernel Release 6 Update 2 debut can be found via the Oracle Linux blog.
Related News
About The Author
Michael Larabel

Michael Larabel is the principal author of and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via

Popular News This Week