Is /var/log on ZFS or tmpfs after applying exisiting 2.5.2 config?

[rmaeder]

I wonder whether there is a slight problem migrating a 2.5.2 configuration to the new zfs and handling of /var/log.

I did a fresh install of 2.6.0 on my backup unit, and loaded the existing configuration from production (2.5.2).
During the first boot there was this error message:

'/var/log': not a ZFS filesystem

but it is listed with 'zfs list':

pfSense/var/log        112K  11.0G   112K  /var/log

df -h /var /var/log shows both on tmpfs (no separate mount for /var/log)

tmpfs         200M     47M    153M    24%    /var
tmpfs         200M     47M    153M    24%    /var

but 'mount' shows:

pfSense/var/log on /var/log (zfs, local, noatime, noexec, nosuid, nfsv4acls)
tmpfs on /var (tmpfs, local)

so, where is it?
My existing configuration specified a memory file system for /tmp and /var.

is a ramdisk for /var no longer recommended?

[bob2022]

I think the mount entries is processed according to the order. So the tmpfs mounted at /var at a lower position masks (or overlay) the zfs /var/log. The system is actually using tmpfs for the whole /var.