diff --git a/block/blk-core.c b/block/blk-core.c
index 0bfaa54..2deca48a 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1746,7 +1746,9 @@ static blk_qc_t blk_queue_bio(struct request_queue *q, struct bio *bio)
 		if (!request_count)
 			trace_block_plug(q);
 		else {
-			if (request_count >= BLK_MAX_REQUEST_COUNT) {
+			struct request *last = list_entry_rq(plug->list.prev);
+			if (request_count >= BLK_MAX_REQUEST_COUNT ||
+			    blk_rq_bytes(last) >= BLK_PLUG_FLUSH_SIZE) {
 				blk_flush_plug_list(plug, false);
 				trace_block_plug(q);
 			}