async_daemon - Creates a local NFS asynchronous I/O server
unsigned long iod_num,
unsigned long magic);
Specifies the number of I/O threads to run.
For Tru64 UNIX, this is 950410. If a different value is used, seven
NFS I/O threads are run.
The use of the async_daemon() function is not supported in customer appli-
cations, and the interface is subject to change without notice. It is
intended for use solely by nfsiod(8).
The async_daemon() function starts iod_num NFS I/O kernel threads that are
used to improve NFS I/O performance. This function does not return to the
caller, but remains in the kernel to provide additional support for NFS
The async_daemon function has no successful return. In fact, it frees the
text and data segments associated with the calling program so there is
nothing to return to. When interrupted by a KILL signal, the I/O threads
are terminated and the process exits. If the async_daemon function
encounters errors, , -1 is returned and errno is set to indicate the error.
If the async_daemon() function fails, errno may be set to the following
[EBUSY] The async_daemon function has already been called by another pro-
[EPERM] The caller is not the superuser.
[EINVAL] More than 64 I/O threads were requested.
[ENOMEM] The kernel memory allocator has no memory.