--- 9f30530d110908131f5e5bf84efbda19a7992796
+++ 52c9596f2a2b0885cb4d20aae4ea262642dbde95
@@ -1,3 +1,23 @@
+config VM_DIRTY_RATIO
+	int "vm_dirty_ratio"
+	default 15
+	help
+
+config VM_DIRTY_BACKGROUND_RATIO
+	int "vm_dirty_background_ratio"
+	default 3
+	help
+
+config VM_DIRTY_WRITBACK_INT
+	int "vm_dirty_writeback_interval"
+	default 500
+	help
+
+config VM_DIRTY_EXPIRE_INT
+	int "vm_dirty_expure_interval"
+	default 3000
+	help
+
 config SELECT_MEMORY_MODEL
 	def_bool y
 	depends on EXPERIMENTAL || ARCH_SELECT_MEMORY_MODEL