DS_FIELD_REMAP_DEADLIST
VERIFY0(zap_add(mos, dsobj, DS_FIELD_REMAP_DEADLIST,
DS_FIELD_REMAP_DEADLIST, sizeof (remap_deadlist_obj), 1,
DS_FIELD_REMAP_DEADLIST, sizeof (obj), 1, &obj, tx));
ds->ds_object, DS_FIELD_REMAP_DEADLIST, tx));