|| Linux Programmer's Manual
NAME idle - make process 0 idle
() is an internal system call used during bootstrap. It marks the process's pages as swappable, lowers its priority, and enters the main scheduling loop.
() never returns.
Only process 0 may call idle(). Any user process, even a process with superuser permission, will receive EPERM.
idle() never returns for process 0, and always returns -1 for a user process.
Always, for a user process.
VERSIONS Since Linux 2.3.13, this system call does not exist anymore.
CONFORMING TO This function is Linux-specific, and should not be used in programs intended to be portable.
COLOPHON This page is part of release 3.53 of the Linux
man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.