(In reply to Ludwig Nussel from comment #7) > Note that by default we have a btrfs subvolume for /tmp that is mounted via > fstab, so according to > https://www.freedesktop.org/wiki/Software/systemd/APIFileSystems/ this takes > preference ie no change in behavior for a default install on btrfs actually. Correct but if a customer selected ext4 I'm not sure that /tmp is referenced in fstab.