---dmesg---
rereplica: loaded (hz=100)
rereplica: armed (re_timer shape, 1-tick period)
rereplica: re_tick parked on our serializer (fired=720 ran=719) - entering callout_stop()
rereplica: IF THIS IS THE LAST rereplica LINE, AB-BA DEADLOCK IS PROVEN
---ps---
  1120 D5     costp    sysctl kern.rereplica.stop=1
---stop4025.out---
kern.rereplica.stop: 0RUN_DONE
SECOND_SAMPLE_DONE
  1120 D5     costp    sysctl kern.rereplica.stop=1

--- post-test ---
The wedged guest did NOT power off cleanly via ssh (callout starvation impact
evidence): 'vm.sh down' timed out waiting for poweroff; QEMU force-killed and
reverted to the 'with-src' snapshot; guest verified back up afterwards.
Wedge observed for >20s across two samples before reset (permanent, not transient).