Interesting developments on that front: "User-space interrupts", https://lwn.net/Articles/871113/ https://lwn.net/Articles/871113/ Also see Google's fast users

Interesting developments on that front: "User-space interrupts", https://lwn.net/Articles/871113/ https://lwn.net/Articles/871113/ Also see Google's fast userspace context switching, which would basically let you implement pipes the way they were originally designed and implemented in Unix, as a kind of coroutine that implicitly passed control flow to the other process when you filled or drained a buffer.