uvm_fault(0xfffffd807f014990, 0x8, 0, 1) -> e
fatal page fault in supervisor mode
trap type 6 code 0 rip ffffffff81ee9b9e cs 8 rflags 10246 cr2 8 cpl 0 rsp ffff8000216d6040
gsbase 0xffffffff82b5bff0  kgsbase 0x0
panic: trap type 6, code=0, pc=ffffffff81ee9b9e
Starting stack trace...
panic(ffffffff8271b881) at panic+0x155 sys/kern/subr_prf.c:229
kerntrap(ffff8000216d5f90) at kerntrap+0x1b7 sys/arch/amd64/amd64/trap.c:334
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
fifo_write(ffff8000216d6090) at fifo_write+0x4e sys/miscfs/fifofs/fifo_vnops.c:272
VOP_WRITE(fffffd8062247018,ffff8000216d6140,3,fffffd807f7d7820) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245
ktrwriteraw(ffff8000ffff4da8,fffffd8062247018,fffffd807f7d7820,ffff8000216d6200,ffff8000216d61e0) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:660
ktrstruct(ffff8000ffff4da8,ffffffff827cfc30,ffff8000216d63b0,20) at ktrstruct+0x16f ktrwrite2 sys/kern/kern_ktrace.c:625 [inline]
ktrstruct(ffff8000ffff4da8,ffffffff827cfc30,ffff8000216d63b0,20) at ktrstruct+0x16f sys/kern/kern_ktrace.c:309
sys_kevent(ffff8000ffff4da8,ffff8000216d6570,ffff8000216d65c0) at sys_kevent+0x550 sys/kern/kern_event.c:985
syscall(ffff8000216d6640) at syscall+0x4e6 sys/arch/amd64/amd64/trap.c:626
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x257402900, count: 247
End of stack trace.

dump to dev 4,1 not possible
rebooting...
SeaBIOS (version 1.8.2-google)
Total RAM Size = 0x0000000080000000 = 2048 MiB
CPUs found: 2     Max CPUs supported: 2
SeaBIOS (version 1.8.2-google)
Machine UUID a0530fd3-c3ad-b54d-95aa-ef4c7d9dfdbd
found virtio-scsi at 0:3
virtio-scsi vendor='Google' product='PersistentDisk' rev='1' type=0 removable=0
virtio-scsi blksize=512 sectors=4194304 = 2048 MiB
drive 0x000f27d0: PCHS=0/0/0 translation=lba LCHS=520/128/63 s=4194304
Sending Seabios boot VM event.
Booting from Hard Disk 0...
>> OpenBSD/amd64 BOOT 3.55
boot> set $lines = 0
set: syntax error
boot> set $maxwidth = 0
set: syntax error
boot> show panic
boot: illegal argument panic
boot> trace
boot> show registers
boot> show proc
boot> ps
boot> show all locks
boot> show malloc
boot> show all pools
boot> machine ddbcpu 0
machine: syntax error
boot> trace
boot> machine ddbcpu 1
machine: syntax error
boot> trace