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Announcing the general availability of Unbreakable Enterprise Kernel Release 4

The Oracle Linux team is pleased to announce the general
availability of the Unbreakable Enterprise Kernel (UEK) Release 4 for Oracle
Linux 6 and Oracle Linux 7.  This release, based on the 4.1 mainline
kernel, delivers many important new features and enhancements engineered for modern
cloud infrastructure.  

  • Significant
    performance improvements
    enhancements to features like automatic NUMA balancing and CPU schedulers,
    and the introduction of new features like zswap, zram, the LZ4 compression
    algorithm, network batch transmissions and low-latency network polling.
  • More
    options for boosting the security of systems and the applications they
    . UEK Release 4 now includes
    kernel address space randomization, a new random number system call and
    updates in key areas like SELinux, nftables, SHA256 and SHA512.
  • Real-time
    kernel and userspace patching

    with Ksplice for Oracle Linux to simplify managing cloud infrastructure
    and improve security.
  • Support
    for key cloud technologies.
    Xen host and guest domain feature and performance enhancements, 
    Open vSwitch and VXLAN improvements for networking, cgroups and namespace enhancements for linux containers and Docker.
  • Enhancements
    to Oracle Linux DTrace
    for dynamic,
    real-time system tracing on production systems
  • The
    production release and support of Ceph Storage for Oracle Linux Release
    , based on the upstream Firefly
  • New
    real-time kernel features

    including timerless (tickless) multitasking and the addition of the deadline
    scheduling class
  • Enhanced
    infiniband features
    including improved
    protocols, drivers and firmware.
  • A number of updates to key areas such as XFS, Btrfs,
    Ext4, NFS, FUSE and the Overlay file systems.
  • A number of driver updates supporting the latest

This has been a major engineering effort that can benefit every
Oracle Linux customer. For more
information on this release, please review the release notes here.

Oracle Linux is available to download from the Oracle
Software Delivery Cloud
and the Oracle Yum repos.

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