async_daemon(2) System Calls Manual async_daemon(2)
NAME
async_daemon - Creates a local NFS asynchronous I/O server
SYNOPSIS
async_daemon(
unsigned long iod_num,
unsigned long magic);
PARAMETERS
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.
DESCRIPTION
The use of the async_daemon() function is not supported in customer applications, 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 over TCP.
RETURN VALUES
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_dae-
mon function encounters errors, , -1 is returned and errno is set to indicate the error.
ERRORS
If the async_daemon() function fails, errno may be set to the following value: The async_daemon function has already been called by another
process. The caller is not the superuser. More than 64 I/O threads were requested. The kernel memory allocator has no memory.
RELATED INFORMATION
Functions: nfssvc(2)
Commands: nfsiod(8) delim off
async_daemon(2)
