--- include/linux/mmzone.h

+++ include/linux/mmzone.h

@@ -15,6 +15,7 @@

#include <linux/seqlock.h>

#include <linux/nodemask.h>

#include <linux/pageblock-flags.h>

+#include <linux/timer.h>

#include <generated/bounds.h>

#include <asm/atomic.h>

#include <asm/page.h>

@@ -173,12 +174,14 @@ enum zone_watermarks {

WMARK_MIN,

WMARK_LOW,

WMARK_HIGH,

+ WMARK_LOTS,

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 lots_wmark_pages(z) (z->watermark[WMARK_LOTS])

struct per_cpu_pages {

int count; /* number of pages in the list */

@@ -350,7 +353,7 @@ struct zone {

ZONE_PADDING(_pad1_)

/* Fields commonly accessed by the page reclaim scanner */

- spinlock_t lru_lock;

+ spinlock_t lru_lock;

struct zone_lru {

struct list_head list;

} lru[NR_LRU_LISTS];

@@ -652,6 +655,7 @@ typedef struct pglist_data {

wait_queue_head_t kswapd_wait;

struct task_struct *kswapd;

int kswapd_max_order;

+ struct timer_list watermark_timer;

enum zone_type classzone_idx;

} pg_data_t;