Box had over 100Mb swap - and neither 'top' nor 'swapctl -lk'
showed any problem.  It has now been deployed elsewhere - but I'll
try to replicate the problem on a virgin box of the same type
this week. 

-----Original Message-----
From: woods@weird.com
To: Jenkins, Graham K [IBM GSA]
Cc: port-i386@netbsd.org
Sent: 7/29/01 1:21 AM
Subject: Re: NetBSD 1.5.1 GENERIC Kernel Crash with /tmp on mfs

[ On Saturday, July 28, 2001 at 22:11:43 (+1000), Jenkins, Graham K
\[IBM GSA\] wrote: ]
> Subject: NetBSD 1.5.1 GENERIC Kernel Crash with /tmp on mfs
>
> Guys, I've had a number of kernel crashes whilst trying to build
> a new kernel on a 486 with 16Mb memory, with /tmp on a memory
filesystem
> in swap space.  Happens about 40 minutes after restarting the 'make'. 
> Unmounting /tmp seemed to solve the problem.

I'll bet you're running out of space....

How much swap space do you have configured?

Can you replicate the crash by simply copying files into /tmp until it's
full?