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My Weird Prompts · Yesterday · 26 min

Swapping Your Linux Kernel: What Actually Changes

On Ubuntu you're not locked to the kernel your distribution shipped — you can pull a newer upstream one, stay on an older one, or install a kernel someone rebuilt for a specific kind of work. This episode maps the whole landscape: how Ubuntu decides what to ship (including release candidates under its 2024 policy), what actually changes between kernel versions, why hardware support and performance are two very different reasons to switch, and what Liquorix, XanMod, and the now-mainline PREEMPT_RT kernel each optimize for. The most interesting moment comes when XanMod's own documentation labels the AVX-512 build as having no kernel benefit — the vendor of the CPU-optimized kernel undermining the enthusiast argument. Along the way: EEVDF replacing the completely fair scheduler, the throughput-versus-latency axis every tuning choice sits on, and why desktop and server motivations split apart. Key sources: • Liquorix Kernel homepage — https://liquorix.net/ • XanMod Kernel homepage, builds dated 2026-10-11 — https://xanmod.org/ • Canonical Kernel Team policy, 2024-08-09 (updated 2025-08-11) — https://discourse.ubuntu.com/t/kernel-version-selection-for-ubuntu-releases/47007 Episode 5970 — myweirdprompts.com/n/5970 (permanent short link: myweirdprompts.com/310056)

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On Ubuntu you're not locked to the kernel your distribution shipped — you can pull a newer upstream one, stay on an older one, or install a kernel someone rebuilt for a specific kind of work. This episode maps the whole landscape: how Ubuntu decides what to ship (including release candidates under its 2024 policy), what actually changes between kernel versions, why hardware support and performance are two very different reasons to switch, and what Liquorix, XanMod, and the now-mainline PREEMPT_RT kernel each optimize for. The most interesting moment comes when XanMod's own documentation labels the AVX-512 build as having no kernel benefit — the vendor of the CPU-optimized kernel undermining the enthusiast argument. Along the way: EEVDF replacing the completely fair scheduler, the throughput-versus-latency axis every tuning choice sits on, and why desktop and server motivations split apart.

Key sources:
• Liquorix Kernel homepage — https://liquorix.net/
• XanMod Kernel homepage, builds dated 2026-10-11 — https://xanmod.org/
• Canonical Kernel Team policy, 2024-08-09 (updated 2025-08-11) — https://discourse.ubuntu.com/t/kernel-version-selection-for-ubuntu-releases/47007

Episode 5970 — myweirdprompts.com/n/5970 (permanent short link: myweirdprompts.com/310056)

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