diff --git a/module/zfs/dsl_scan.c b/module/zfs/dsl_scan.c
index 50d4ed3d40b5..c919ca19e43e 100644
--- a/module/zfs/dsl_scan.c
+++ b/module/zfs/dsl_scan.c
@@ -2718,7 +2718,7 @@ dsl_scan_visit(dsl_scan_t *scn, dmu_tx_t *tx)
 			dsl_scan_visitds(scn,
 			    dp->dp_origin_snap->ds_object, tx);
 		}
-		ASSERT(!scn->scn_suspending);
+		ASSERT(!scn->scn_suspending); // <-
 	} else if (scn->scn_phys.scn_bookmark.zb_objset !=
 	    ZB_DESTROYED_OBJSET) {
 		uint64_t dsobj = scn->scn_phys.scn_bookmark.zb_objset;
diff --git a/module/zfs/metaslab.c b/module/zfs/metaslab.c
index ce68134b00bb..99d0a1836e0f 100644
--- a/module/zfs/metaslab.c
+++ b/module/zfs/metaslab.c
@@ -3945,7 +3945,7 @@ metaslab_sync(metaslab_t *msp, uint64_t txg)
 	 * This metaslab has just been added so there's no work to do now.
 	 */
 	if (msp->ms_new) {
-		ASSERT0(range_tree_space(alloctree));
+		ASSERT0(range_tree_space(alloctree)); // <-
 		ASSERT0(range_tree_space(msp->ms_freeing));
 		ASSERT0(range_tree_space(msp->ms_freed));
 		ASSERT0(range_tree_space(msp->ms_checkpointing));
@@ -4785,7 +4785,7 @@ metaslab_group_alloc_normal(metaslab_group_t *mg, zio_alloc_list_t *zal,
 			ASSERT(msp->ms_loaded);
 
 			was_active = B_TRUE;
-			ASSERT(msp->ms_weight & METASLAB_ACTIVE_MASK);
+			ASSERT(msp->ms_weight & METASLAB_ACTIVE_MASK); // <-
 		} else if (activation_weight == METASLAB_WEIGHT_SECONDARY &&
 		    mga->mga_secondary != NULL) {
 			msp = mga->mga_secondary;
@@ -4799,7 +4799,7 @@ metaslab_group_alloc_normal(metaslab_group_t *mg, zio_alloc_list_t *zal,
 			ASSERT(msp->ms_loaded);
 
 			was_active = B_TRUE;
-			ASSERT(msp->ms_weight & METASLAB_ACTIVE_MASK);
+			ASSERT(msp->ms_weight & METASLAB_ACTIVE_MASK);  // <-
 		} else {
 			msp = find_valid_metaslab(mg, activation_weight, dva, d,
 			    want_unique, asize, allocator, try_hard, zal,