> Linux has POSIX aio syscalls which seems to work. At least Informix and Oracle rely on them. That only works for read, write and fsync. There are plenty of

> Linux has POSIX aio syscalls which seems to work. At least Informix and Oracle rely on them. That only works for read, write and fsync. There are plenty of other blocking syscalls that people need to use. e.g. An important missing one is getdents.