vn_htable
struct vn_htable_list **vn_htable;
hp->vn_htable = mdb_zalloc(sizeof (struct vn_htable_list *)
hent = hp->vn_htable[hkey];
htmp = &hp->vn_htable[VN_HTABLE_KEY(hent->vn_ptr, hp)];
hent->vn_h_next = hp->vn_htable[hkey];
hp->vn_htable[hkey] = hent;