Yeah, of course a synchronous call that might block the thread is blocking, I agree... but, if I didn't have the context of "we're in a comment thread about a b

Yeah, of course a synchronous call that might block the thread is blocking, I agree... but, if I didn't have the context of "we're in a comment thread about a blog post about mmap", I'm pretty sure I wouldn't flag `x[i]` on `x: &[u8]` (or any other access) as a synchronous call that is worth worrying about. Hence the discussion of subtlety in https://huonw.github.io/blog/2024/08/async-hazard-mmap/#at-a-distance https://huonw.github.io/blog/2024/08/async-hazard-mmap/#at-a... It's obvious when pointed out, but I don't think it's obvious without the context of "there's an mmap nearby". (Author here, this behaviour wasn't surprising to me, but felt subtle enough to be worth investigating, and get some concrete data.)