Delivering SIGKILL to init

From: Peter Jeremy <peterjeremy@xxxxxxxxxxxxxxxx>
Date: Tue, 19 Sep 2006 17:55:50 +1000

Prompted by some discussion elsewhere, I've been trying to send
SIGKILL to init. If I ktrace kill(1), I can see "kill(1,9)" which
returns 0 but the signal is never delivered. If I sent (eg) SIGXCPU
then init dies and the kernel panics (as expected). I've looked
through sys/kern/kern_* and can't see anywhere that special cases
the delivery of SIGKILL to init.

Can anyone please explain why SIGKILL doesn't kill init (at least
on -stable).

--
Peter Jeremy

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