DF-3906 / console_markers.txt
login: xlreplica: loaded (if_xl.c callout protocol replica) xlreplica[arm]: xl_stat_timer armed (1 tick), waiting xlreplica[stop]: tick INPROG and PARKED on the serializer (fired=2 ran=1) xlreplica[stop]: IF THIS IS THE LAST xlreplica LINE callout_stop NEVER RETURNED (AB-BA deadlock)