Using ZFS root, mountall fails to mount /var soon enough

[tigloo]

Full description of the problem is here:

https://groups.google.com/a/zfsonlinux.org/forum/?fromgroups=#!topic/zfs-discuss/bmDxY24xrIg

When using a ZFS root file system with / located in rpool/ROOT/ubuntu-1 and /var located in rpool/var, /var is not available when upstart is beginning to start all daemons. This prevents many daemons from starting properly. It seems that /var is only mounted at a later stage.

The reason is unknown to me, as a workaround rpool/var can be moved to rpool/ROOT/ubuntu-1/var (so that it is a descendant of the root file system's data set). This seems to make /var immediately available at boot.

Note: the problem started to appear with ZoL RC12 (or rather, the Ubuntu packages of RC12), RC11 did not show this problem.

[mk01]

probably ugly solution, but after after we realized, that there is very strict dependency in the code that a filesystem can't be mounted (won't be processed at all) if a filesystem right before him didn't finish mounting (what means long the list of filesystems is waiting on a slug in the front), you can change it to legacy mountpoint and put it like first line to /etc/fstab.