aio(4) asynchronous I/O


To link into the kernel: options VFS_AIO

To load as a kernel loadable module:

kldload aio


The facility provides system calls for asynchronous I/O. It is available both as a kernel option for static inclusion and as a dynamic kernel module.


The facility appeared as a kernel option in Fx 3.0 . The kernel module appeared in Fx 5.0 .