diff --git a/ktweak b/ktweak
index 7553f69..7a482ab 100644
--- a/ktweak
+++ b/ktweak
@@ -150,9 +150,18 @@ do
 		fi
 	done
 
+	# Do not use I/O as a source of randomness
+	write "${queue}add_random" 0
+
 	# Disable I/O statistics accounting
 	write "${queue}iostats" 0
 
+	# Only attempt simple merges
+	write "${queue}nomerges" 1
+
+	# Force request completion on the origin CPU for maximum cache locality
+	write "${queue}rq_affinity" 2
+
 	# Reduce heuristic read-ahead in exchange for I/O latency
 	write "${queue}read_ahead_kb" 16