+ /* Atoms should be able to move by up to half the list buffer size (if > 0)
+ * within nstlist steps. Since boundaries are allowed to displace by half
+ * a cell size, DD cells should be at least the size of the list buffer.
+ */
+ comm->cellsize_limit = max(comm->cellsize_limit,
+ ir->rlistlong - max(ir->rvdw, ir->rcoulomb));
+