Section (2) idle
idle — make process 0 idle
idle() is an internal system
call used during bootstrap. It marks the process_zsingle_quotesz_s pages as
swappable, lowers its priority, and enters the main
Only process 0 may call
idle(). Any user process, even a process
with superuser permission, will receive EPERM.
This function is Linux-specific, and should not be used in programs intended to be portable.
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Copyright 1993 Rickard E. Faith (faithcs.unc.edu)
Portions extracted from linux/mm/swap.c:
Copyright (C) 1991, 1992 Linus Torvalds
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Modified 21 Aug 1994 by Michael Chastain <mecshell.portal.com>:
Added text about calling restriction (new in kernel 1.1.20 I believe).
N.B. calling idle from user process used to hang process!
Modified Thu Oct 31 14:41:15 1996 by Eric S. Raymond <esrthyrsus.com>