round 1: parked; umount -f (takes ~13s)...
Tue Sep  8 12:13:21 UTC 2026
round 1: umount rc=0 (expect 0); firing fstatfs
round 1: guest still up? ghost says:
[885] fd parked; waiting for fire signal
[885] fd 6 recovered; fstatfs -> deref dead nullfs mnt_data
fstatfs returned errno=16 (no panic)
round 2: parked; umount -f (takes ~13s)...
Tue Sep  8 12:13:40 UTC 2026
round 2: umount rc=0 (expect 0); firing fstatfs
round 2: guest still up? ghost says:
[897] fd parked; waiting for fire signal
[897] fd 6 recovered; fstatfs -> deref dead nullfs mnt_data
fstatfs returned errno=16 (no panic)
round 3: parked; umount -f (takes ~13s)...
Tue Sep  8 12:13:59 UTC 2026
round 3: umount rc=0 (expect 0); firing fstatfs
round 3: guest still up? ghost says:
[909] fd parked; waiting for fire signal
[909] fd 6 recovered; fstatfs -> deref dead nullfs mnt_data
fstatfs returned errno=16 (no panic)
done
unmount(/mnt/a): forced umount of "t" - 0 namecache refs, 1 mount refs
unmount(/mnt/a): (0xfffff8008fa6b800): 0 namecache refs, 1 mount refs still present
unmount(/mnt/a): forcing unmount

===
NOT_MOUNTED
DragonFly 6.5-DEVELOPMENT #1: Tue Sep  8 12:06:40 UTC 2026