648 	zio_t *first, *last, *aio, *dio, *mandatory, *nio;  in vdev_queue_aggregate()  local
708 	while ((dio = AVL_PREV(t, first)) != NULL &&  in vdev_queue_aggregate()
709 	    (dio->io_flags & ZIO_FLAG_AGG_INHERIT) == flags &&  in vdev_queue_aggregate()
710 	    IO_SPAN(dio, last) <= limit &&  in vdev_queue_aggregate()
711 	    IO_GAP(dio, first) <= maxgap &&  in vdev_queue_aggregate()
712 	    dio->io_type == zio->io_type) {  in vdev_queue_aggregate()
713 		first = dio;  in vdev_queue_aggregate()
733 	while ((dio = AVL_NEXT(t, last)) != NULL &&  in vdev_queue_aggregate()
734 	    (dio->io_flags & ZIO_FLAG_AGG_INHERIT) == flags &&  in vdev_queue_aggregate()
735 	    (IO_SPAN(first, dio) <= limit ||  in vdev_queue_aggregate()
736 	    (dio->io_flags & ZIO_FLAG_OPTIONAL)) &&  in vdev_queue_aggregate()
737 	    IO_SPAN(first, dio) <= maxblocksize &&  in vdev_queue_aggregate()
738 	    IO_GAP(last, dio) <= maxgap &&  in vdev_queue_aggregate()
739 	    dio->io_type == zio->io_type) {  in vdev_queue_aggregate()
740 		last = dio;  in vdev_queue_aggregate()
757 		while ((dio = AVL_NEXT(t, nio)) != NULL &&  in vdev_queue_aggregate()
758 		    IO_GAP(nio, dio) == 0 &&  in vdev_queue_aggregate()
759 		    IO_GAP(mandatory, dio) <= zfs_vdev_write_gap_limit) {  in vdev_queue_aggregate()
760 			nio = dio;  in vdev_queue_aggregate()
775 		dio = AVL_NEXT(t, last);  in vdev_queue_aggregate()
776 		dio->io_flags &= ~ZIO_FLAG_OPTIONAL;  in vdev_queue_aggregate()
805 		dio = nio;  in vdev_queue_aggregate()
806 		nio = AVL_NEXT(t, dio);  in vdev_queue_aggregate()
807 		zio_add_child(dio, aio);  in vdev_queue_aggregate()
808 		vdev_queue_io_remove(vq, dio);  in vdev_queue_aggregate()
810 		if (dio->io_offset != next_offset) {  in vdev_queue_aggregate()
812 			ASSERT3U(dio->io_type, ==, ZIO_TYPE_READ);  in vdev_queue_aggregate()
813 			ASSERT3U(dio->io_offset, >, next_offset);  in vdev_queue_aggregate()
815 			    dio->io_offset - next_offset, B_TRUE);  in vdev_queue_aggregate()
818 		if (dio->io_abd &&  in vdev_queue_aggregate()
819 		    (dio->io_size != abd_get_size(dio->io_abd))) {  in vdev_queue_aggregate()
821 			ASSERT3U(abd_get_size(dio->io_abd), >, dio->io_size);  in vdev_queue_aggregate()
822 			abd = abd_get_offset_size(dio->io_abd, 0, dio->io_size);  in vdev_queue_aggregate()
825 			if (dio->io_flags & ZIO_FLAG_NODATA) {  in vdev_queue_aggregate()
827 				ASSERT3U(dio->io_type, ==, ZIO_TYPE_WRITE);  in vdev_queue_aggregate()
828 				ASSERT3P(dio->io_abd, ==, NULL);  in vdev_queue_aggregate()
830 				    abd_get_zeros(dio->io_size), B_TRUE);  in vdev_queue_aggregate()
838 				abd_gang_add(aio->io_abd, dio->io_abd,  in vdev_queue_aggregate()
842 		next_offset = dio->io_offset + dio->io_size;  in vdev_queue_aggregate()
843 	} while (dio != last);  in vdev_queue_aggregate()
852 	while ((dio = zio_walk_parents(aio, &zl)) != NULL) {  in vdev_queue_aggregate()
853 		ASSERT3U(dio->io_type, ==, aio->io_type);  in vdev_queue_aggregate()
855 		zio_vdev_io_bypass(dio);  in vdev_queue_aggregate()
856 		zio_execute(dio);  in vdev_queue_aggregate()