mb_free_notready
mb_free_notready(sfio->m, sfio->npages);
mb_free_notready(top, total_pages);
mb_free_notready(m, npages);
mb_free_notready(m, total_pages - npages);
mb_free_notready(m, count);
void mb_free_notready(struct mbuf *m, int count);