diff --git a/include/linux/mm.h b/include/linux/mm.h
index 429ff89bfe06e06a175abcf33826646f0ad43eb1..255931ebf2dc468fa11d5171248a87d80239469a 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -74,6 +74,7 @@ static inline void totalram_pages_add(long count)
 
 extern void * high_memory;
 extern int page_cluster;
+extern const int page_cluster_max;
 
 #ifdef CONFIG_SYSCTL
 extern int sysctl_legacy_va_layout;
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 188c305aeb8b7fd8984721122dcfe11bd658aeaa..71a4350ac601b31a838a686c4f15346f4ffd77a3 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -2125,6 +2125,7 @@ static struct ctl_table vm_table[] = {
 		.mode		= 0644,
 		.proc_handler	= proc_dointvec_minmax,
 		.extra1		= SYSCTL_ZERO,
+		.extra2		= (void *)&page_cluster_max,
 	},
 	{
 		.procname	= "dirtytime_expire_seconds",
diff --git a/mm/swap.c b/mm/swap.c
index 2f12a2ee1d3af1f4735a2a658efca841c7031a0e..b9a6817e07ffeff9d54f4902ceccc0dd2d7657d2 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -43,8 +43,9 @@
 #define CREATE_TRACE_POINTS
 #include <trace/events/pagemap.h>
 
-/* How many pages do we try to swap or page in/out together? */
+/* How many pages do we try to swap or page in/out together? As a power of 2 */
 int page_cluster;
+const int page_cluster_max = 31;
 
 /* Protecting only lru_rotate.fbatch which requires disabling interrupts */
 struct lru_rotate {