NetBSD symbiote.internal 4.99.52 NetBSD 4.99.52 (XEN3_DOMU) #0: Mon Feb  
4 18:32:04 EST 2008  
root@spike.internal:/usr/obj/sys/arch/i386/compile/XEN3_DOMU i386

Stopped in pid 419.1 (ntpd) at  netbsd:breakpoint+0x4:  popl    %ebp
 panic: uvm_map_pageable: stale map
db> bt
breakpoint(c0431c3f,cc97ab18,cc97ab0c,c028c20e,cc698324) at 
netbsd:breakpoint+0x
4
panic(c041d447,bb971000,bb98b000,7,1) at netbsd:panic+0x155
uvm_map_pageable(cc698314,bb971000,bb98b000,0,1) at 
netbsd:uvm_map_pageable+0x44
7
uvm_mmap(cc698314,cc97acc8,1a000,5,7) at netbsd:uvm_mmap+0x50d
sys_mmap(cc947b40,cc97ad00,cc97ad28,c03993d5,c038e636) at 
netbsd:sys_mmap+0x342
syscall(cc97ad48,1f,1f,bfbf001f,bba5001f) at netbsd:syscall+0xb8
db>

Sorry if the panic message is a bit out of order ... domu console tends 
to delay chars and submit on reconnection causing the message to be 
chopped up a bit.

If more info is required, I can try and trigger it again.

Sarton