range_tree_max
return (range_tree_max(rt) - range_tree_min(rt));
uint64_t range_tree_max(range_tree_t *rt);
return (range_tree_max(vd->vdev_dtl[DTL_MISSING]));
if (rs_get_start(rs, rt) - range_tree_max(segs) >
svr->svr_max_offset_to_sync[txg & TXG_MASK] = range_tree_max(segs);