diff --git a/kernel/mars_bio.c b/kernel/mars_bio.c
index fb1cc456..c7f5b521 100644
--- a/kernel/mars_bio.c
+++ b/kernel/mars_bio.c
@@ -51,6 +51,8 @@
 #endif
 
 //      end_remove_this
+int bio_nr_requests = 1024;
+
 static struct timing_stats timings[2] = {};
 
 struct threshold bio_submit_threshold = {
@@ -801,6 +803,8 @@ static int bio_switch(struct bio_brick *brick)
 			MARS_INF("'%s' ra_pages OLD=%lu NEW=%d\n", path, q->backing_dev_info.ra_pages, brick->ra_pages);
 			q->backing_dev_info.ra_pages = brick->ra_pages;
 
+			q->nr_requests = bio_nr_requests;
+
 			brick->bvec_max = queue_max_hw_sectors(q) >> (PAGE_SHIFT - 9);
 			if (brick->bvec_max > BIO_MAX_PAGES)
 				brick->bvec_max = BIO_MAX_PAGES;
diff --git a/kernel/mars_bio.h b/kernel/mars_bio.h
index 4efe66ca..98b705ea 100644
--- a/kernel/mars_bio.h
+++ b/kernel/mars_bio.h
@@ -28,6 +28,7 @@
 #define BIO_IO_R_MAX_LATENCY    40000 //  40 ms
 #define BIO_IO_W_MAX_LATENCY   100000 // 100 ms
 
+extern int bio_nr_requests;
 extern struct threshold bio_submit_threshold;
 extern struct threshold bio_io_threshold[2];
 
diff --git a/kernel/sy_old/mars_proc.c b/kernel/sy_old/mars_proc.c
index 5fe45bfd..bca019e9 100644
--- a/kernel/sy_old/mars_proc.c
+++ b/kernel/sy_old/mars_proc.c
@@ -236,6 +236,7 @@ struct ctl_table io_tuning_table[] = {
 	LIMITER_ENTRIES(&global_writeback.limiter, "writeback",       "kb"),
 	INT_ENTRY("writeback_until_percent", global_writeback.until_percent, 0600),
 	THRESHOLD_ENTRIES(&global_io_threshold,  "global_io"),
+	INT_ENTRY("bio_nr_requests", bio_nr_requests, 0600),
 	THRESHOLD_ENTRIES(&bio_submit_threshold, "bio_submit"),
 	THRESHOLD_ENTRIES(&bio_io_threshold[0],  "bio_io_r"),
 	THRESHOLD_ENTRIES(&bio_io_threshold[1],  "bio_io_w"),