IIRC, io-uring makes it very complex to expose a safe zero-overhead async interface, because the kernel expects any buffers that you pass it to live until the o

IIRC, io-uring makes it very complex to expose a safe zero-overhead async interface, because the kernel expects any buffers that you pass it to live until the operation completes (ie, you can’t allocate your own buffer, give it to the kernel, then decide you are uninterested and throw away your buffer). In Rust, this would mean that any buffer basically needs to be 'static. It should be possible to create a an API that uses an intermediate, managed pool of buffers to pass to the kernel, but this would imply extra copies.