New zone ZONE_EASY_RECLAIM take 2[4/5]

This is for calculation of the watermark zone->pages_min/low/high.

Index: new_zone_mm/include/linux/mmzone.h
=================================--- new_zone_mm.orig/include/linux/mmzone.h 2005-11-17 17:07:30.000000000 +0900
+++ new_zone_mm/include/linux/mmzone.h 2005-11-17 17:17:51.000000000 +0900
@@ -401,6 +401,11 @@ static inline struct zone *next_zone(str
#define for_each_zone(zone) \
for (zone = pgdat_list->node_zones; zone; zone = next_zone(zone))

+static inline int is_easy_reclaim_idx(int idx)
+{
+ return (idx = ZONE_EASY_RECLAIM);
+}
+
static inline int is_highmem_idx(int idx)
{
return (idx = ZONE_HIGHMEM);
@@ -416,6 +421,11 @@ static inline int is_normal_idx(int idx)
* to ZONE_{DMA/NORMAL/HIGHMEM/etc} in general code to a minimum.
* @zone - pointer to struct zone variable
*/
+static inline int is_easy_reclaim(struct zone *zone) +{
+ return zone = zone->zone_pgdat->node_zones + ZONE_EASY_RECLAIM;
+}
+
static inline int is_highmem(struct zone *zone)
{
return zone = zone->zone_pgdat->node_zones + ZONE_HIGHMEM;
Index: new_zone_mm/mm/page_alloc.c
=================================--- new_zone_mm.orig/mm/page_alloc.c 2005-11-17 17:09:05.000000000 +0900
+++ new_zone_mm/mm/page_alloc.c 2005-11-17 17:17:51.000000000 +0900
@@ -2495,13 +2495,13 @@ void setup_per_zone_pages_min(void)

/* Calculate total number of !ZONE_HIGHMEM pages */ for_each_zone(zone) {
- if (!is_highmem(zone))
+ if (!is_highmem(zone) && !is_easy_reclaim(zone))
lowmem_pages += zone->present_pages;
}

for_each_zone(zone) {
spin_lock_irqsave(&zone->lru_lock, flags);
- if (is_highmem(zone)) {
+ if (is_highmem(zone) || is_easy_reclaim(zone)) {
/*
* Often, highmem doesn't need to reserve any pages.
* But the pages_min/low/high values are also used for

Yasunori Goto