The
kern_reboot()
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,
kern_reboot()
does the following:
- If this is the first invocation of
kern_reboot()
and the
RB_NOSYNC
flag 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_DUMP
is set in
howto,
but
RB_HALT
is 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.
- If
RB_HALT
is set in
howto,
halts the system.
Otherwise, reboots the system.
If the system has not finished autoconfiguration,
kern_reboot()
runs any shutdown hooks previously registered,
prints a message, and halts the system.
