systemd issue: encrypted tmp fs

[jackd1]

Anyone here using an encrypted tmp filesystem? This had worked fine for me until the last systemd update (Thursday, I think). Now the machine doesn't boot and falls into "emergency mode" with a cryptsetup@tmp.service "dependency" error.

My /etc/crypttab looks like:

tmp /dev/mapper/main-tmp /dev/urandom cipher=aes-cbc-essiv:sha256,size=256,hash=sha256,tmp


And the corresponding entry in /etc/fstab is:

/dev/mapper/tmp /tmp ext4 defaults 1 2


Everything boots fine if I comment-out this line in /etc/fstab, so it doesn't mount /tmp separately.


Thanks in advance for any insights on how to debug this. systemd might be considered better than the init.d scripts, but it is definitely less straightforward to debug this crap when things don't "just work".