4101 metaslab_debug should allow for fine-grained control
4102 space_maps should store more information about themselves
4103 space map object blocksize should be increased
4104 ::spa_space no longer works
4105 removing a mirrored log device results in a leaked object
4106 asynchronously load metaslab
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Adam Leventhal <ahl@delphix.com>
Reviewed by: Sebastien Roy <seb@delphix.com>

@@ -281,13 +281,14 @@
                 if (vd->vdev_removing)
                         fnvlist_add_uint64(nv, ZPOOL_CONFIG_REMOVING,
                             vd->vdev_removing);
         }
 
-        if (vd->vdev_dtl_smo.smo_object != 0)
+        if (vd->vdev_dtl_sm != NULL) {
                 fnvlist_add_uint64(nv, ZPOOL_CONFIG_DTL,
-                    vd->vdev_dtl_smo.smo_object);
+                    space_map_object(vd->vdev_dtl_sm));
+        }
 
         if (vd->vdev_crtxg)
                 fnvlist_add_uint64(nv, ZPOOL_CONFIG_CREATE_TXG, vd->vdev_crtxg);
 
         if (getstats) {