Dual boot between Linux and Solaris yielded "spurious interrupt" msg

[Alex Yung <alyung@lucent.com>]

In setting up dual boot on my Sparc Classic between Linux and Solaris, I
encountered this message:

Boot options:
[1] Linux Kernel 2.4.21
[2] Solaris 9.0

SunOS Release 5.9 Version Generic_112233-08 32-bit
Copyright 1983-2003 Sun Microsystems, Inc.  All rights reserved.
Use is subject to license terms.
spurious interrupt at processor level 10

What is this "spurious interrupt"?  This is my "silo.conf":

$ cat /etc/silo.conf
partition=2
timeout=80
message=/boot/message.txt
root=/dev/sdc2
default=linux
read-only
image=/boot/vmlinuz-2.4.21
        alias=1
        single-key
        label=linux
other=/iommu/sbus/espdma/esp/sd@2,0;1
        alias=2
        single-key
        label=solaris

I tried silo version "0.9.8" and "1.2.5".  Both version yielded the same
message on the console output.  Does anyone have any idea what this is?  How
can I move forward?  I already searched the bug report but this has not been
recorded.  Thanks for any assistance.

Alex