amd64 domU panic under load

["Aaron J. Grier" <agrier%poofygoof.com@localhost>]

anybody seen this?

uvm_fault(0xffffa00005a1f190, 0x7fbfdfe00000, 1) -> e
fatal page fault in supervisor mode
trap type 6 code 0 rip ffffffff802cf27e cs e030 rflags 10206 cr2
7fbfdfe00000 cpl 0 rsp ffffa0007214f870
panic: trap
cpu0: Begin traceback...
printf_nolog() at netbsd:printf_nolog
startlwp() at netbsd:startlwp
alltraps() at netbsd:alltraps+0xa7
pmap_enter() at netbsd:pmap_enter+0x35
uvm_fault_internal() at netbsd:uvm_fault_internal+0xf17
trap() at netbsd:trap+0x500
--- trap (number 6) ---
45b5b2:
cpu0: End traceback...

dump to dev 142,1 not possible
rebooting...

xen 4.1.2 from pkgsrc; dom0 is NetBSD 6.0_BETA2.

there are no new messages in xl dmesg since the domU was started.

-- 
  Aaron J. Grier | "Not your ordinary poofy goof." | 
agrier%poofygoof.com@localhost