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Cake day: January 29th, 2024

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  • Everything that’s in main gets released to everyone with the security fixes. Canonical’s security team works on those.

    The stuff in the universe repo is owned by the Ubuntu community (not by Canonical), so anyone can submit those fixes, but it depends on the Masters of the Universe, who are all volunteers, to get it upstreamed.

    The extra Ubuntu Pro updates for the universe repo come from when someone who’s paying for Ubuntu Pro asks Canonical to make a patch. The source is still available to anyone, so someone could take that patch and then submit it to the community who maintains the universe repo.

    Once the 5 years of standard support ends, then the only way to get additional fixes is through Ubuntu Pro, but if Canonical writes those fixes they also submit them back upstream (as opposed to if they grab a specific patch from upstream — and even then it’s still available on Launchpad regardless.

    The reason nobody’s made a CentOS but for Ubuntu Pro is that it’s way easier to submit the patches through the community (and become part of that community who approves packages) than it is to spin up all the infrastructure that would be needed.












  • They don’t in general, but things that do heavily detailed graphics work (like your compositor or browser) or lots of cryptography work on the CPU can get a bit more out of those newer instructions than many other programs.

    Very approximately, things that Gentoo offers prebuilt versions of because compiling them is so resource intensive are often the things that can get the best benefit out of your architecture variant. (Not singling out Gentoo here as an example of “doing it badly” - they do the sensible thing by providing these prebuilt binaries, but in some ways it defeats the purpose of optimised source distributions.)

    It’s a Hard Problem™ to solve.