diff --git a/include/linux/mm.h b/include/linux/mm.h
index 6faba4f28ab4..646648e4d2db 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1989,7 +1989,7 @@ int write_one_page(struct page *page, int wait);
 void task_dirty_inc(struct task_struct *tsk);
 
 /* readahead.c */
-#define VM_MAX_READAHEAD	512	/* kbytes */
+#define VM_MAX_READAHEAD	CONFIG_VM_MAX_READAHEAD	/* kbytes */
 #define VM_MIN_READAHEAD	16	/* kbytes (includes current page) */
 
 int force_page_cache_readahead(struct address_space *mapping, struct file *filp,
diff --git a/mm/Kconfig b/mm/Kconfig
index 1105a5b79b1e..274a315e0684 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -743,3 +743,11 @@ config PROCESS_RECLAIM
 	 (addr, addr + size-bytes) of the process.
 
 	 Any other vaule is ignored.
+
+config VM_MAX_READAHEAD
+	int "default max readahead window size"
+	default 128
+	help
+	 This sets the VM_MAX_READAHEAD value to allow the readahead window
+	 to grow to a maximum size of configured. This will benefit sequential
+	 read throughput and thus early boot performance.