mpool_new
if ((meta = mpool_new(t->bt_mp, &npg, MPOOL_PAGE_NEXT)) == NULL)
if ((root = mpool_new(t->bt_mp, &npg, MPOOL_PAGE_NEXT)) == NULL)
return (mpool_new(t->bt_mp, npg, MPOOL_PAGE_NEXT));
pagep = mpool_new(hashp->mp, &paddr, MPOOL_PAGE_REQUEST);
void *mpool_new __P((MPOOL *, db_pgno_t *, u_int));