> > Shutdown just calls a routine in the kernel to handle the shutdown before
> > it is killed itself. Therefore, this ability needs to be in the kernel
> Sorry, I don't agree. The shutdown(8) programme is what kills all
> processes, unmounts filesystems, remounts the root FS read-only, syncs
> the discs and then calls reboot(2) which halts/reboots.
Could this code be in shutdown(8) ? Hmm, no... there is always the
possibility that the kernel may need to perform some other "clean up" work.
Surely this is the concept behind the notifier_call_chain() calls inside
sys_reboot().
For example, the wdt driver turns off the card at shutdown time. If the
shutdown(8) program never calls sys_reboot() then the card is never turned
off, and a watchdog reset could occur. Not good :-) It could cause a
reboot! Some other drivers also hook into the reboot_notifier_list to
perform a cleanup on shutdown.
No... the kernel needs to perform a full shutdown, and so the "beep on
halt" has to be in the kernel.
Stephen Harris
sweh@spuddy.mew.co.uk http://www.spuddy.org/
The truth is the truth, and opinion just opinion. But what is what?
My employer pays to ignore my opinions; you get to do it for free.
* Meeeeow ! Call Spud the Cat on > 01268 515441 < for free Usenet access *
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/