this post was submitted on 29 Aug 2024
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Wedson Almeida Filho is a Microsoft engineer who has been prolific in his contributions to the Rust for the Linux kernel code over the past several years. Wedson has worked on many Rust Linux kernel features and even did a experimental EXT2 file-system driver port to Rust. But he's had enough and is now stepping away from the Rust for Linux efforts.

From Wedon's post on the kernel mailing list:

I am retiring from the project. After almost 4 years, I find myself lacking the energy and enthusiasm I once had to respond to some of the nontechnical nonsense, so it's best to leave it up to those who still have it in them.

...

I truly believe the future of kernels is with memory-safe languages. I am no visionary but if Linux doesn't internalize this, I'm afraid some other kernel will do to it what it did to Unix.

Lastly, I'll leave a small, 3min 30s, sample for context here: https://youtu.be/WiPp9YEBV0Q?t=1529 -- and to reiterate, no one is trying force anyone else to learn Rust nor prevent refactorings of C code."

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[–] [email protected] -3 points 2 months ago* (last edited 2 months ago) (53 children)

The kernel is mostly written in C, by C developers... understandably they're rather refactor C code to make it better instead of rewritting everything in the current fancy language that'll save the world this time (especially considering proponents of said language always, at every chance they get, sell it as C is crap, this is better).

Linux is over 30yo and keeps getting better and more stable, that's the power of open-source.

[–] [email protected] 3 points 2 months ago (42 children)

C is crap for anything where security matters. I'll happily take that debate with anyone who thinks differently.

[–] [email protected] 24 points 2 months ago (7 children)

I think most people would agree with you, but that isn't really the issue. Rather the question is where the threshold for rewriting in Rust vs maintaining in C lies. Rewriting in any language is costly and error-prone, so at what point do the benefits outweigh that cost and risk? For a legacy, battle-tested codebase (possibly one of the most widely tested codebases out there), the benefit is probably on the lower side.

[–] [email protected] 6 points 2 months ago

If the timeline is long enough then it's always worth the refactor.

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