diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_object.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_object.c
index 11561f2..42885a8 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_object.c
+++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_object.c
@@ -105,11 +105,9 @@ dmu_object_claim(objset_t *os, uint64_t object, dmu_object_type_t ot,
 
 int
 dmu_object_reclaim(objset_t *os, uint64_t object, dmu_object_type_t ot,
-    int blocksize, dmu_object_type_t bonustype, int bonuslen)
+    int blocksize, dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx)
 {
 	dnode_t *dn;
-	dmu_tx_t *tx;
-	int nblkptr;
 	int err;
 
 	if (object == DMU_META_DNODE_OBJECT)
@@ -120,44 +118,15 @@ dmu_object_reclaim(objset_t *os, uint64_t object, dmu_object_type_t ot,
 	if (err)
 		return (err);
 
-	if (dn->dn_type == ot && dn->dn_datablksz == blocksize &&
-	    dn->dn_bonustype == bonustype && dn->dn_bonuslen == bonuslen) {
-		/* nothing is changing, this is a noop */
-		dnode_rele(dn, FTAG);
-		return (0);
-	}
-
-	if (bonustype == DMU_OT_SA) {
-		nblkptr = 1;
-	} else {
-		nblkptr = 1 + ((DN_MAX_BONUSLEN - bonuslen) >> SPA_BLKPTRSHIFT);
-	}
-
-	/*
-	 * If we are losing blkptrs or changing the block size this must
-	 * be a new file instance.   We must clear out the previous file
-	 * contents before we can change this type of metadata in the dnode.
-	 */
-	if (dn->dn_nblkptr > nblkptr || dn->dn_datablksz != blocksize) {
-		err = dmu_free_long_range(os, object, 0, DMU_OBJECT_END);
-		if (err)
-			goto out;
+	if (dn->dn_type != ot || dn->dn_datablksz != blocksize ||
+	    dn->dn_bonustype != bonustype || dn->dn_bonuslen != bonuslen) {
+		ASSERT(dn->dn_maxblkid == 0 &&
+		    (BP_IS_HOLE(&dn->dn_phys->dn_blkptr[0]) ||
+		    dnode_block_freed(dn, 0)));
+		dnode_reallocate(dn, ot, blocksize, bonustype, bonuslen, tx);
 	}
 
-	tx = dmu_tx_create(os);
-	dmu_tx_hold_bonus(tx, object);
-	err = dmu_tx_assign(tx, TXG_WAIT);
-	if (err) {
-		dmu_tx_abort(tx);
-		goto out;
-	}
-
-	dnode_reallocate(dn, ot, blocksize, bonustype, bonuslen, tx);
-
-	dmu_tx_commit(tx);
-out:
 	dnode_rele(dn, FTAG);
-
 	return (err);
 }
 
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_send.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_send.c
index c8b5f94..fc909ff 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_send.c
+++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_send.c
@@ -1186,9 +1186,11 @@ backup_byteswap(dmu_replay_record_t *drr)
 static int
 restore_object(struct restorearg *ra, objset_t *os, struct drr_object *drro)
 {
-	int err;
+	dmu_object_info_t doi;
 	dmu_tx_t *tx;
 	void *data = NULL;
+	uint64_t object;
+	int err;
 
 	if (drro->drr_type == DMU_OT_NONE ||
 	    !DMU_OT_IS_VALID(drro->drr_type) ||
@@ -1202,10 +1204,11 @@ restore_object(struct restorearg *ra, objset_t *os, struct drr_object *drro)
 		return (SET_ERROR(EINVAL));
 	}
 
-	err = dmu_object_info(os, drro->drr_object, NULL);
+	err = dmu_object_info(os, drro->drr_object, &doi);
 
 	if (err != 0 && err != ENOENT)
 		return (SET_ERROR(EINVAL));
+	object = err == 0 ? drro->drr_object : DMU_NEW_OBJECT;
 
 	if (drro->drr_bonuslen) {
 		data = restore_read(ra, P2ROUNDUP(drro->drr_bonuslen, 8));
@@ -1213,37 +1216,45 @@ restore_object(struct restorearg *ra, objset_t *os, struct drr_object *drro)
 			return (ra->err);
 	}
 
-	if (err == ENOENT) {
+	if (err == 0 &&
+	    (drro->drr_type != doi.doi_type ||
+	     drro->drr_blksz != doi.doi_data_block_size ||
+	     drro->drr_bonustype != doi.doi_bonus_type ||
+	     drro->drr_bonuslen != doi.doi_bonus_size)) {
+		/*
+		 * We clear out the previous object contents if the new object
+		 * is sufficiently different from the previous.
+		 */
+		err = dmu_free_long_range(os, drro->drr_object,
+		    0, DMU_OBJECT_END);
+		if (err != 0)
+			return (SET_ERROR(EINVAL));
+	}
+
+	tx = dmu_tx_create(os);
+	dmu_tx_hold_bonus(tx, object);
+	err = dmu_tx_assign(tx, TXG_WAIT);
+	if (err != 0) {
+		dmu_tx_abort(tx);
+		return (err);
+	}
+
+	if (object == DMU_NEW_OBJECT) {
 		/* currently free, want to be allocated */
-		tx = dmu_tx_create(os);
-		dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT);
-		err = dmu_tx_assign(tx, TXG_WAIT);
-		if (err != 0) {
-			dmu_tx_abort(tx);
-			return (err);
-		}
 		err = dmu_object_claim(os, drro->drr_object,
 		    drro->drr_type, drro->drr_blksz,
 		    drro->drr_bonustype, drro->drr_bonuslen, tx);
-		dmu_tx_commit(tx);
 	} else {
 		/* currently allocated, want to be allocated */
 		err = dmu_object_reclaim(os, drro->drr_object,
 		    drro->drr_type, drro->drr_blksz,
-		    drro->drr_bonustype, drro->drr_bonuslen);
+		    drro->drr_bonustype, drro->drr_bonuslen, tx);
 	}
 	if (err != 0) {
+		dmu_tx_commit(tx);
 		return (SET_ERROR(EINVAL));
 	}
 
-	tx = dmu_tx_create(os);
-	dmu_tx_hold_bonus(tx, drro->drr_object);
-	err = dmu_tx_assign(tx, TXG_WAIT);
-	if (err != 0) {
-		dmu_tx_abort(tx);
-		return (err);
-	}
-
 	dmu_object_set_checksum(os, drro->drr_object, drro->drr_checksumtype,
 	    tx);
 	dmu_object_set_compress(os, drro->drr_object, drro->drr_compress, tx);
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/dmu.h b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/dmu.h
index a10faa3..b722d05 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/dmu.h
+++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/dmu.h
@@ -333,7 +333,7 @@ uint64_t dmu_object_alloc(objset_t *os, dmu_object_type_t ot,
 int dmu_object_claim(objset_t *os, uint64_t object, dmu_object_type_t ot,
     int blocksize, dmu_object_type_t bonus_type, int bonus_len, dmu_tx_t *tx);
 int dmu_object_reclaim(objset_t *os, uint64_t object, dmu_object_type_t ot,
-    int blocksize, dmu_object_type_t bonustype, int bonuslen);
+    int blocksize, dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *txp);
 
 /*
  * Free an object from this objset.