You have two datasets with mountpoint=/ (and canmount=on) which is going
to cause problems like this.
vms/roots/mate-1804 mountpoint / local
vms/roots/mate-1804 canmount on default
vms/roots/xubuntu-1804 mountpoint / local
vms/roots/xubuntu-1804 canmount on default
The normal setup for root-on-ZFS is for the initramfs to mount the root
filesystem, so it is supposed to be canmount=noauto.
You should do something like:
zfs set canmount=noauto vms/roots/mate-1804
zfs set canmount=noauto vms/roots/xubuntu-1804
Also, this too, though it isn't actually a problem here:
zfs set canmount=off vms/roots
zfs set mountpoint=none vms/roots
** Changed in: zfs-linux (Ubuntu)
Status: In Progress => Invalid
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https://bugs.launchpad.net/bugs/1846424
Title:
19.10 ZFS Update failed on 2019-10-02
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