port-sparc/44258: Sparc32/SMP randomly reboots without any message

[joel.bertrand%systella.fr@localhost]

>Number:         44258
>Category:       port-sparc
>Synopsis:       Sparc32/SMP randomly reboots without any message
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    port-sparc-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Dec 21 09:05:00 +0000 2010
>Originator:     BERTRAND Joël
>Release:        NetBSD 5.99.41
>Organization:
>Environment:
NetBSD riemann 5.99.41 NetBSD 5.99.41 (GENERIC.MP) #0: Fri Dec 17 22:07:08 UTC 
2010  
builds%b8.netbsd.org@localhost:/home/builds/ab/HEAD/sparc/201012172000Z-obj/home/builds/ab/HEAD/src/sys/arch/sparc/compile/GENERIC.MP
 sparc
>Description:
When I install more than one CPU (ROSS RT626 or SM71) in SS20, system randomly 
reboots. Kernel is more stable than older kernel I have tested (5.99.24) but 
not stable enough to build NetBSD from sources with 'make -j4'.

If there is only one CPU in the same SparcStation, system is rock solid.

When system reboots, there is no message on serial console. Older kernels 
crashed with 'Watchdog reset' or 'NMI...'. This kernel only reboots and I don't 
know how investigate.
>How-To-Repeat:
Install more than one CPU in a SparcStation (Ross as problem is easier to 
reproduce) and rebuild NetBSD from sources with make -j4 for example.
>Fix:
Don't use NetBSD/Sparc in a SMP workstation.