Is this a way to have non-blocking reads from file system? For regular files O_NONBLOCK does nothing, so one has to use thread pools. For plain files served fro

Is this a way to have non-blocking reads from file system? For regular files O_NONBLOCK does nothing, so one has to use thread pools. For plain files served from local disk it's usually not worth it. But files can be served by sshfs, nfs or something more exotic made with FUSE. If I understand this correctly one can use RWF_NOWAIT to do what one would naively expect from O_NONBLOCK. Am I correct?