It's been pointed out my trap report was inadequate (Thanks Jonathan Gray). I have reproduced the problem. Here is a better report (typed in by hand, since I haven't figured out this modern all-USB mboard with no regular comm port).
/bsd single kernel traps on my box during 'make obj' in /usr/src: (( OpenBSD 4.0 (GENERIC) #1104: Fri Sep 1 11:54:27 MDT 2006 [EMAIL PROTECTED]:/usr/src/sys/arch/i386/compile/GENERIC )) ... [ Last time it happened at ===> sbin/restore .. this time ] [ at ==> /usr/sbin/ypserve/mknetid ] uvm_fault(0xd073ff00, 0xd2000000, 0, 3) -> e kernel: page fault trap, code=0 Stopped at: uvm_pagealloc_strat+0x155: movl %eax,0x4(%ecx) ddb> ps PID PPID PGRP UID S FLAGS WAIT COMMAND *17788 5392 14645 0 7 0x4006 make 5392 8533 14645 0 3 0x86 pause sh 8533 30238 14645 0 3 0x4086 pause sh 30238 1844 14645 0 3 0x4086 wait make 1844 7917 14645 0 3 0x86 pause sh 7917 30539 14645 0 3 0x4086 pause sh 30539 20299 14645 0 3 0x4086 wait make 20372 14645 14645 0 3 0x4086 pause sh 14645 19375 14645 0 3 0x4086 wait make 19375 1671 19375 0 3 0x4086 pause ksh 23957 1 23957 0 3 0x4086 ttyin getty 31189 1 31189 0 3 0x4086 ttyin getty 17575 1 17575 0 3 0x4086 ttyin getty 31000 1 31000 0 3 0x4086 ttyin getty 1671 1 1671 1000 3 0x4086 pause ksh 29412 1 29412 0 3 0x84 select cron 3834 1 3834 0 3 0x40184 select sendmail 12364 1 12364 0 3 0x84 select sshd 7484 1 7484 0 3 0x184 select inetd 937 19045 19045 73 2 0x184 syslogd 19045 1 19045 0 3 0x8c netio syslogd 19 0 0 0 3 0x100204 crypto_wa crypto 18 0 0 0 3 0x100204 aiodoned aiodoned 17 0 0 0 3 0x100204 syncer update 16 0 0 0 3 0x100204 cleaner cleaner 15 0 0 0 3 0x100204 reaper reaper 14 0 0 0 3 0x100204 pgdaemon pagedaemon 13 0 0 0 3 0x100204 pftm pfpurge 12 0 0 0 3 0x100204 wait wskbd_hotkey 11 0 0 0 3 0x100204 usbevt usb6 10 0 0 0 3 0x100204 usbevt usb5 9 0 0 0 3 0x100204 usbevt usb4 8 0 0 0 3 0x100204 usbevt usb3 7 0 0 0 3 0x100204 usbevt usb2 6 0 0 0 3 0x100204 usbevt usb1 5 0 0 0 3 0x100204 usbtsk usbtask 4 0 0 0 3 0x100204 usbevt usb0 3 0 0 0 3 0x100204 apmev apm0 2 0 0 0 3 0x100204 kmalloc kthread 1 0 1 0 3 0x4084 wait init 0 -1 0 0 3 0x80204 scheduler swapper ddb> trace uvm_pagealloc_strat(0,0,0,ec6cacc0,2,0,0,1) at uvm_pagealloc_strat+0x155 uvm_fault(da435374,851a3000,0,3,0) at uvm_fault+0x946 trap() at trap+0x255 --- trap (number 6) ---- 0x1bb18e3: ddb> -- Jack J. Woehr # "Men never do evil so completely and PO Box 51, Golden, CO 80402 # cheerfully as when they do it from http://www.well.com/~jax # religious conviction." - Pascal