=== RUN 2 (independent repeat, 60 s) ===
$ /tmp/df5094 60
opened /dev/vinum/control, spawning 3 daemons + 4 saveconfig producers for 60s
t+10s: 3210125 saveconfig elements queued
t+20s: 6139043 saveconfig elements queued
t+30s: 9257800 saveconfig elements queued
t+40s: 12401548 saveconfig elements queued
t+50s: 15534814 saveconfig elements queued
t+60s: 18707180 saveconfig elements queued
done: 18707189 elements queued; daemons still running in-kernel (expected)
RC=0; guest up; dmesg clean of corruption messages (see dmesg.txt)
Total across both runs: ~46.5M daemonq elements through 3 concurrent daemons,
zero double-free/double-dequeue manifestations.