systemd 258 Changes and Multi-Kernel RFC Deep Dive

Can't get enough Linux? How about multiple kernels running simultaneously, side by side, not in a VM, all on the same hardware; this week it's finally looking real.

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• GNOME 49 Release Notes — We code named the release “Brescia”, after a beautiful Italian city that hosted this year’s GUADEC.
• GNOME 49 Officially Released With Wayland Improvements, Showtime As Video Player
• Ubuntu 25.10 Beta Officially Released For Testing — Canonical today released the Ubuntu 25.10 Beta as they work toward the stable Ubuntu 25.10 release in mid-October.
• Ubuntu 25.10's Rust Coreutils Transition Has Uncovered Performance Shortcomings — Ubuntu 25.10's transition to using Rust Coreutils in place of GNU Coreutils has uncovered a few performance issues so far with the Rust version being slower than the C-based GNU Coreutils.
• base64 implementation almost 8x slower than GNU for some large files
• sort does not finish for large one line file
• Fedora 43 Beta ISOs Released For Testing — Fedora 43 Beta ISOs are now available for those wanting to help in testing.
• Omarchy 3.0 — Omarchy 3.0 is here — faster installs, big MacBook support, and lots of polish.
• systemd 258 Released With systemd-factory-reset & Other New Tools — Systemd 258 brings systemd-factory-reset to request a factory reset on the next reboot, systemd-pty-forward to allocate a pseudo TTY/PTY, UEFI firmware images can now be embedded in a UKI, and many other new features.
• systemd 258-rc1 Is A Massive Feature Release With New Tools, More Than 260 Changes
• Kernel RFC: Introduce multikernel architecture support — This patch series introduces multikernel architecture support, enabling multiple independent kernel instances to coexist and communicate on a single physical machine. Each kernel instance can run on dedicated CPU cores while sharing the underlying hardware resources.
• The Multikernel: A new OS architecture for scalable multicore systems [PDF]
• mirdaki/computer-config — Config for server and personal deployments
• My Ultimate Self-hosting Setup — Matthew shares their ultimate self-hosting setup built on NixOS, ZFS, and Tailscale, balancing privacy, data control, and usability for family and friends.
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