Zpool should be used less than 80% on solaris 10 branded zone?

Hello all,

We have some solaris 10u10 branded zones running on solaris 11.2

But sol 10 zones doesn't have the followings patch

All of the metaslab fragmentation issues are resolved in KU -04	(14744[10]-04 via these fixes:
	6876962 degraded write performance with threads held up by	space_map_load_wait()
	6962304 metaslab_min_alloc_size may be too big
	6993637 metaslab_group_alloc() should passivated a slab that fails	to activate
	7000208 space map thrashing affects NFS write throughput
	7033559 metaslab group allocation biasing is broken
	7036242 ds_lock should not be held over I/O calls
	7042770 remove metaslab_smo_bonus_pct code
	With these in place, I have seen even upto 95% full zpool giving