After chatting with people at HotOS, I was inspired to write this blog post summarizing my HotOS paper. At a high-level, the HotOS paper advocates for a new high-level I/O abstraction for kernel-bypass. In the past, kernel-bypass has been associated with giving applications low-level access to devices. We argue that modern kernel-bypass applications should use a high-level abstraction instead, provided by a user-level, library OS that runs alongside the application in its address space. In this...