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. idle() 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
EPERM Always, for a user process.
Since 2.3.13 this system call does not exist anymore.
This function is Linux-specific, and should not be used in programs
intended to be portable.
This page is part of release 3.35 of the Linux man-pages project. A
description of the project, and information about reporting bugs, can
be found at http://man7.org/linux/man-pages/.
Linux 1994-08-21 IDLE(2)
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