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IDLE(2) Linux Programmer's Manual IDLE(2)
idle - make process 0 idle
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 super-user permis-
sion, will receive EPERM.
idle never returns for process 0, and always returns -1 for a user process.
EPERM Always, for a user process.
This function is Linux-specific, and should not be used in programs intended to be porta-
Since 2.3.13 this system call does not exist anymore.
Linux 1.1.46 1994-08-21 IDLE(2)
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