metaslab_group_sort
metaslab_group_sort(msp->ms_group, msp,
metaslab_group_sort(mg, msp, msp->ms_weight |
metaslab_group_sort(msp->ms_group, msp, 0);
metaslab_group_sort(mg, msp, weight);
metaslab_group_sort(mg, msp, weight);