diff --git a/block/blk-mq.c b/block/blk-mq.c
index 652a31fc3bb3..49587c181e3f 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -2148,14 +2148,14 @@ static void blk_add_rq_to_plug(struct blk_plug *plug, struct request *rq)
 }
 
 /*
- * Allow 4x BLK_MAX_REQUEST_COUNT requests on plug queue for multiple
+ * Allow 2x BLK_MAX_REQUEST_COUNT requests on plug queue for multiple
  * queues. This is important for md arrays to benefit from merging
  * requests.
  */
 static inline unsigned short blk_plug_max_rq_count(struct blk_plug *plug)
 {
 	if (plug->multiple_queues)
-		return BLK_MAX_REQUEST_COUNT * 4;
+		return BLK_MAX_REQUEST_COUNT * 2;
 	return BLK_MAX_REQUEST_COUNT;
 }
 
diff --git a/block/blk.h b/block/blk.h
index 6c3c00a8fe19..aab72194d226 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -184,6 +184,12 @@ bool blk_bio_list_merge(struct request_queue *q, struct list_head *list,
 void blk_account_io_start(struct request *req);
 void blk_account_io_done(struct request *req, u64 now);
 
+/*
+ * Plug flush limits
+ */
+#define BLK_MAX_REQUEST_COUNT	32
+#define BLK_PLUG_FLUSH_SIZE	(128 * 1024)
+
 /*
  * Internal elevator interface
  */
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 12b9dbcc980e..683aee365420 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1198,8 +1198,6 @@ struct blk_plug {
 	bool multiple_queues;
 	bool nowait;
 };
-#define BLK_MAX_REQUEST_COUNT 16
-#define BLK_PLUG_FLUSH_SIZE (128 * 1024)
 
 struct blk_plug_cb;
 typedef void (*blk_plug_cb_fn)(struct blk_plug_cb *, bool);