Rust async echo server kernel module

github.com

6 points·mfrw··5 comments

The specific commit [0]. I am not sure what am I missing. Although the pull request mentions only `echo server` but it has other commits as well. Can anyone please help my teeny brain of what is going on :(

[0]: https://github.com/Rust-for-Linux/linux/commit/4536277a0e619...

The Rust language defines the semantics of async functions, but doesn't provide anything that runs them. Usually when you write async Rust code, you import a library that implements one or more ways of running async futures for you.

Doimg this in the kernel complicates things; it can't just import tokio like most Rust programs.

This pull request has three commits. The first modifies some C code slightly, and adds a helper so that it can be used from Rust code. (Most of this is actually a C macro, rather than a function that can be called).

The second commit implements a simple executor for async code, which stores tasks to be completed in the future in a workqueue. The workqueue already existed in the kernel.

The fin commit is the echo server, written in async Rust and executed using the executor from the previous commit.

Thank you, my question was a little different. If I check the logs of the merged PR, I can only see one commit; while this PR has 3 commits. It's more of a git question, why did the merge not have all the 3 commits. My git skills are less than beginner.

https://github.com/Rust-for-Linux/linux/commits/rust

You can see that four merge requests were taken at the same time. #802 is unrelated, while #752, #798, and #796 are related to the echo server. It appears that the author created a merge request for each of the three commits. The three commits are on the lines below.

Ahhh .. thank you :) I think now things make a little sense :) I was starting to think `git being git`

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