this post was submitted on 03 Sep 2024
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Linux
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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
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Linus hit the nail on the head. If you've been a Kernel dev for a decade or more, and have spent decades learning the ins and outs of C, why would you want to switch to something that is similar, but different in a lot of ways, just because a small subset of devs think it's the best way forward? Let them handle Rust and the majority of devs will keep using C, even though Rust is objectively better.
As one of the other quotes suggested: fork the kernel project and rewrite it entirely in Rust, that way there isn't any push back from the C devs. Replacing C with Rust in the upstream kernel is akin to replacing the engine in a car while it's running or being used every day.
The kernel is probably too large to rewrite the whole thing at once. This could lead to a future without any new C kernel devs, leading to stagnation, while the Rust kernel could be many years away from being finished. (Assuming we actually move away from C.)
At that point you might as well just start an entirely new kernel and hope it is good enough to eventually replace the Linux one once all devs are gone. Kinda the X11 and wayland thing.
You can very safely remove the "probably" from your first sentence.