diff --git a/block/blk-core.c b/block/blk-core.c
index 6403c12..ea70e6c 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1387,8 +1387,10 @@
 				if (__rq->q != q)
 					plug->should_sort = 1;
 			}
-			if (request_count >= BLK_MAX_REQUEST_COUNT)
+			if (request_count >= BLK_MAX_REQUEST_COUNT) {
 				blk_flush_plug_list(plug, false);
+				trace_block_plug(q);
+			}
 		}
 		list_add_tail(&req->queuelist, &plug->list);
 		drive_stat_acct(req, 1);