idle(2) — Linux manual page

idle(2)                    System Calls Manual                   idle(2)

NAME

       idle - make process 0 idle

SYNOPSIS

       #include <unistd.h>

       [[deprecated]] int idle(void);

DESCRIPTION

       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.

RETURN VALUE

       idle() never returns for process 0, and always returns -1 for a
       user process.

ERRORS

       EPERM  Always, for a user process.

STANDARDS

       Linux.

HISTORY

       Removed in Linux 2.3.13.

COLOPHON

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Linux man-pages 6.9.1          2024-05-02                        idle(2)

Pages that refer to this page: syscalls(2)

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