This release includes realtime support (PREEMPT_RT), a feature that has been in the works for 20 years. It also includes complete support for the EEVDF task scheduler; the ability to write task scheduling algorithms using BPF; support for printing a QR code on panic screens with debug information; support for zero-copy receive TCP payloads to a DMABUF region of memory while packet headers land separately in normal kernel buffers; a new linux security modules that enforces that binaries must come from integrity-protected storage; support for Memory Protection Keys in ARM; and XFS support for block sizes larger than a memory page. As always, there are many other features, new drivers, improvements and fixes.