port-alpha/53809: kernel locks up

[martin%NetBSD.org@localhost]

>Number:         53809
>Category:       port-alpha
>Synopsis:       kernel locks up
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    port-alpha-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Dec 25 11:05:00 +0000 2018
>Originator:     Martin Husemann
>Release:        NetBSD 8.99.29
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD gemini.duskware.de 8.99.29 NetBSD 8.99.29 (GENERIC-$Revision: 1.386 $) #114: Tue Dec 25 10:34:46 CET 2018 martin%seven-days-to-the-wolves.aprisoft.de@localhost:/work/src/sys/arch/alpha/compile/GENERIC.MP alpha
Architecture: alpha
Machine: alpha
>Description:

Sometime in the last three weeks my test machine started locking up randomly
very frequently. Often I can just boot it, let it sit at the login prompt
for a few minutes and it hangs. I can no get into ddb so usefull information
is hard to extract.

I have no idea what change triggered it. Booting a netbsd-8 kernel always
works and does not lock up, so I am pretty sure it is not my hardware
failing.

Full dmesg of this machine at https://netbsd.org/~martin/alpha-atf/dmesg.txt

>How-To-Repeat:

s/a

>Fix:

n/a