bhyve server 2016 lockup

[Matt Churchyard]

Hello,

I have a server 2016 virtual machine which I only created for testing and don't use much. Booting it up recently I've found that it locks up consistently within a few minutes of booting. What can I do to try and figure out what's causing the problem?

Host was recently updated to 11.2
# uname -a
FreeBSD dev.--- 11.2-RELEASE FreeBSD 11.2-RELEASE #0 r335510: Fri Jun 22 04:32:14 UTC 2018     root at releng2.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC  amd64

Bhyve command is as follows
# bhyve -c 2 -m 2G -Huwl bootrom,/usr/local/share/uefi-firmware/BHYVE_UEFI.fd
  -U 841e8764-75f4-11e8-b2e3-50e549369bc6 -l com1,stdio
  -s 0,hostbridge -s 31,lpc -s 3:0,ahci-cd,/vm/.config/null.iso -s 4:0,ahci-hd,/vm/w2016/disk0.img -s 5:0,e1000,tap1,mac=58:9c:fc:08:8e:70
  -s 6:0,fbuf,tcp=0.0.0.0:5900 -s 7:0,xhci,tablet w2016

Top output -
  PID USERNAME    THR PRI NICE   SIZE    RES STATE   C   TIME    WCPU COMMAND
29796 root         22  20    0  2122M   944M kqread  0  24:59 113.13% bhyve

Regards,
Matt Churchyard