1 files changed, 7 insertions, 4 deletions

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index dcf1b66a96ab..5b4bfb90fb94 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -269,10 +269,10 @@ enum zone_watermarks {
         NR_WMARK
 };
 
-#define min_wmark_pages(z) (z->_watermark[WMARK_MIN])
-#define low_wmark_pages(z) (z->_watermark[WMARK_LOW])
-#define high_wmark_pages(z) (z->_watermark[WMARK_HIGH])
-#define wmark_pages(z, i) (z->_watermark[i])
+#define min_wmark_pages(z) (z->_watermark[WMARK_MIN] + z->watermark_boost)
+#define low_wmark_pages(z) (z->_watermark[WMARK_LOW] + z->watermark_boost)
+#define high_wmark_pages(z) (z->_watermark[WMARK_HIGH] + z->watermark_boost)
+#define wmark_pages(z, i) (z->_watermark[i] + z->watermark_boost)
 
 struct per_cpu_pages {
         int count;              /* number of pages in the list */
@@ -364,6 +364,7 @@ struct zone {
 
         /* zone watermarks, access with *_wmark_pages(zone) macros */
         unsigned long _watermark[NR_WMARK];
+        unsigned long watermark_boost;
 
         unsigned long nr_reserved_highatomic;
 
@@ -890,6 +891,8 @@ static inline int is_highmem(struct zone *zone)
 struct ctl_table;
 int min_free_kbytes_sysctl_handler(struct ctl_table *, int,
                                         void __user *, size_t *, loff_t *);
+int watermark_boost_factor_sysctl_handler(struct ctl_table *, int,
+                                        void __user *, size_t *, loff_t *);
 int watermark_scale_factor_sysctl_handler(struct ctl_table *, int,
                                         void __user *, size_t *, loff_t *);
 extern int sysctl_lowmem_reserve_ratio[MAX_NR_ZONES];