Index: head/sys/geom/geom_subr.c
===================================================================
--- head/sys/geom/geom_subr.c
+++ head/sys/geom/geom_subr.c
@@ -1134,8 +1134,11 @@
 	bp2->bio_completed += bp->bio_completed;
 	g_destroy_bio(bp);
 	bp2->bio_inbed++;
-	if (bp2->bio_children == bp2->bio_inbed)
+	if (bp2->bio_children == bp2->bio_inbed) {
+		if (bp2->bio_cmd == BIO_SPEEDUP)
+			bp2->bio_completed = bp2->bio_length;
 		g_io_deliver(bp2, bp2->bio_error);
+	}
 }
 
 /* XXX: maybe this is only g_slice_spoiled */
Index: head/sys/geom/stripe/g_stripe.c
===================================================================
--- head/sys/geom/stripe/g_stripe.c
+++ head/sys/geom/stripe/g_stripe.c
@@ -298,6 +298,8 @@
 		mtx_unlock(&sc->sc_lock);
 		if (pbp->bio_driver1 != NULL)
 			uma_zfree(g_stripe_zone, pbp->bio_driver1);
+		if (bp->bio_cmd == BIO_SPEEDUP)
+			pbp->bio_completed = pbp->bio_length;
 		g_io_deliver(pbp, pbp->bio_error);
 	} else
 		mtx_unlock(&sc->sc_lock);