RTV_RTTVAR
caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar);
rmx->rmx_rttvar, (rmx->rmx_locks & RTV_RTTVAR) ? 'L' : ' ');
metric(RTV_RTTVAR, rmx_rttvar);
if ((rt->rt_rmx.rmx_locks & RTV_RTTVAR) == 0) {