Alex,
Thanks for your continued research into this.
The upstream 168 changelog is informative (edited for relevant parts):
Summary of changes from v167 to v168
============================================
Kay Sievers (35):
udevadm: info --cleanup-db
"db_persist=" -> "db_persist"
require explicit "db_persist" to exclude device info from --db-cleanup
It is somewaht opaque, but the relevant commits appear to be in the current
systemd git[1].
Does this mean that dm mapper should set db_persist in the initramfs?
Mark
[1]
https://github.com/search?q=repo%3Asystemd%2Fsystemd+db_persist&type=commits
