|BOOT(9)||Kernel Developer's Manual||BOOT(9)|
boot() function handles final system shutdown, and either halts or reboots the system. The exact action to be taken is determined by the flags passed in howto and by whether or not the system has finished autoconfiguration.
If the system has finished autoconfiguration,
boot() does the following:
- If this is the first invocation of
boot() and the
RB_NOSYNCflag is not set in howto, syncs and unmounts the system disks by calling vfs_unmountall(9).
- Disables interrupts.
- If rebooting after a crash (i.e., if
RB_DUMPis set in howto, but
RB_HALTis not), saves a system crash dump.
- Runs any shutdown hooks previously registered.
- Prints a message indicating that the system is about to be halted or rebooted.
RB_HALTis set in howto, halts the system. Otherwise, reboots the system.
If the system has not finished autoconfiguration,
boot() runs any shutdown hooks previously
registered, prints a message, and halts the system.
|February 14, 1997||Linux 4.19.0-10-amd64|