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Red Hat Enterprise Linux (RHEL) 8.4 released

On May 18th  2021 Red Hat released RHEL 8.4 the fourth service pack for their leading enterprise version. This is a long term support version and therefore a good starting point for new projects as well as an upgrade target for exiting installations.

The kernel level for RHEL 8.4 is kernel-4.18.0-305.el8. It’s the second release to support KVM via the Red Hat Enterprise Linux for IBM Z & LinuxONE with Comprehensive Add-Ons

As this is the top Linux version from Red Hat, this release contains many bug fixes but also many features.

Here are a few highlights of the new functions:

  • Graphical installer for KVM on Z
  • support for a first set of eBPF (Extended Berkeley Packet Filterfunctions
  • slab cache merging has been disabled in the kernel. If this is causing any trouble (stability or performance), you can reenable it by adding the kernel parameter slub_merge
  • New modules: Python 3.9, Redis 6, PostrgrSQL 13, MariaDB 10.5 and more
  • gcc toolset 10 update and many other glibc enhancements

Here is my usual summary of links to more information:

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