Reproducible panic - Going nowhere without my init!

[Andy Farkas]

Reverted your patch then changed line 1011 of init.c to _exit(97):

--- init.c-orig 2016-10-05 18:52:24.022910000 +1000
+++ init.c 2016-10-06 17:02:33.714624000 +1000
@@ -1008,7 +1008,7 @@
  */
  warning("single user shell terminated.");
  sleep(STALL_TIMEOUT);
- _exit(0);
+ _exit(97);
  } else {
  warning("single user shell terminated, restarting");
  return (state_func_t) single_user;

...and got a panic that showed "exit 97":  http://imgur.com/xonPwxR

I think that kern_reboot() is not being called somehow.
kern_reboot() is the only place rebooting = 1; is executed.

"init died (signal 0, exit 97)
panic: Going nowhere without my init!"

can only happen if rebooting = 0 in kern_exit.c exit1().

Another tell that kern_reboot() has not been called is "cpuid = 3"
because the first thing kern_reboot() does is bind to CPU 0.

Why is kern_reboot() being skipped? I have no idea.

Anything more I can do to help?  Do you want a core dump?

-andyf