Re: port-amd64/58344: Machine hangs at end of shutdown -r

[RVP <rvp%SDF.ORG@localhost>]

>>Description:
>
>        I have a machine which for all of netbsd-9 has been hanging at
>        'shutdown -r'
>
>[...]
>[ 7564512.5113085] unmounting 0xffff87886ae02008 /var (/dev/raid0e)...
>[ 7564512.5531619] unmounting 0xffff87886bcf4008 / (/dev/raid0a)...
>[ 7564512.5831671] forcefully unmounting /var (/dev/raid0e)...
>[ 7564512.6632000] unmounting 0xffff87886bcf4008 / (/dev/raid0a)...
>[ 7564512.7032133] forcefully unmounting / (/dev/raid0a)...
>[ 7564512.7932552] raid0: detached
>[ 7564512.8129638] sd9: detached
>[ 7564512.8306441] sd1: detached
>[ 7564512.8483243] rebooting...
>
>        instead of rebooting. It will then require a power cycle,
>        which is most awkward when I happen to not be on site.
>

Can you try the other way of inducing the triple-fault?
Change the `#if 0' to `#if 1' and move it after x86_reset():

https://github.com/NetBSD/src/blob/netbsd-9/sys/arch/amd64/amd64/machdep.c#L1964

-RVP