The kernel radar: folios, multi-generational LRU, and Rust

Oh, I hadn't considered that you could mutate a lists through another one...

I don't immediately see any reason why it shouldn't be possible. Rust's weak references have similar semantics albeit still require reference counting because it can't just go and remove the remaining references like with a list. I don't think it's natively supported by the intrusive-collections crate mentioned above though. But you should be able to express it with a safe interface.

Evidently there doesn't seem to be a lot of demand for something like that from existing rust users though. intrusive-collections is already not exactly widely used. I've personally never found a reason to use it despite looking for excuses, there's just too many specialized high quality data structure libraries to justify it. Maybe some day.