What does "HAMMER UPGRADE" flag means during hammer cleanup

[Matthew Dillon]

:Hi,
:
:While running hammer cleanup a new pfs i created and mounted showed
:
:cleanup /vms/vm-archlinux    - HAMMER UPGRADE: Creating snapshots
:        Creating snapshots in /var/hammer/vms/vm-archlinux
: handle PFS #8 using /var/hammer/vms/vm-archlinux
:           snapshots - run
:               prune - run
:           rebalance - run..
:             reblock - run....
:              recopy - run....
:
:where as the old pfses does not show the  "HAMMER UPGRADE" flag

    It says that when it needs to create snapshot meta-data for
    hammer v4.  I'm not sure why it decided it needed to do that if
    the filesystem was already v4 (and assuming the hammer utility
    wasn't an old copy either).  It is a one-time process when it
    does happen.

					-Matt
					Matthew Dillon 
					<dillon at backplane.com>