# detailed discussion of COW behaviour of snapshots:
https://www.clevernetsystems.com/lvm-snapshots-explained/
# mentions 'dmsetup table' command

# Mention of 'lvconvert --merge' to restore from a snapshot:
https://www.golinuxcloud.com/linux-lvm-snapshot-backup-restore-tutorial/

# more current (performed 2021-04-25):
lvconvert --mergesnapshot quixote-vg/snap_root
lvconvert --mergesnapshot quixote-vg/snap_var
lvconvert --mergesnapshot quixote-vg/snap_home
lvconvert --mergesnapshot quixote-vg/snap_share