Index: head/sys/cam/cam_iosched.c
===================================================================
--- head/sys/cam/cam_iosched.c
+++ head/sys/cam/cam_iosched.c
@@ -1345,8 +1345,7 @@
 #endif
 	}
 #ifdef CAM_IOSCHED_DYNAMIC
-	else if (do_dynamic_iosched &&
-	    (bp->bio_cmd == BIO_WRITE || bp->bio_cmd == BIO_FLUSH)) {
+	else if (do_dynamic_iosched && (bp->bio_cmd != BIO_READ)) {
 		if (cam_iosched_sort_queue(isc))
 			bioq_disksort(&isc->write_queue, bp);
 		else