+
+ # b=3941
+ # In mds recovery, the mds will clear orphans in ost by
+ # mds_lov_clear_orphan, which will sent the request to ost and waiting for
+ # the reply, if we stop mds at this time, we will got the obd_refcount > 1
+ # errors, because mds_lov_clear_orphan grab a export of mds,
+ # so the obd_refcount of mds will not be zero. So, wait a while before
+ # stop mds. This bug needs further work.