Comment # 11 on bug 1225882 from Eugenio Paolantonio

Hi Erik, thanks for trying out what I suggested!

I think that a similar race condition might happen after unmounting the old
partition. Apparently this has been observed already with btrfs [0].

Could you try running the same commands as before, but replacing the last
command (sed) with this instead?

> sed -i 's|prun /usr/sbin/cryptsetup luksClose|sleep 5;prun /usr/sbin/cryptsetup luksClose|' /usr/lib/tik/modules/pre/20-mig


This is not going to be the actual fix, but if it works it might confirm my
suspicions above.


Thanks!

[0]
https://old.reddit.com/r/btrfs/comments/z8x15k/umount_returning_even_though_btrfscleaner_is/