On Mon, 14 Dec 1998, Stephen Harris wrote:
> Richard Gooch writes:
> > Jason A. Pfeil writes:
>
> > > 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 *
>
----
Jason A. Pfeil pfeil@cs.fsu.edu
Information Systems Developer jpfeil@lsi.fsu.edu
CASDL (850)644-8014; fax: (850)644-4952
Learning Systems Institute University Center C-3527
http://idl.fsu.edu Tallahassee, FL 32306-2540
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