NNOLAYOUT
(np->n_flag & NNOLAYOUT) != 0 || retrycnt > 0)
(np->n_flag & NNOLAYOUT) != 0 || retrycnt > 0)
(np->n_flag & NNOLAYOUT) != 0)
np->n_flag |= NNOLAYOUT;
(VTONFS(vp)->n_flag & NNOLAYOUT) != 0)