X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=include%2Flinux%2Fmmzone.h;h=3ea68cd3b61f29a04b708c8c8f4043cccf6b2450;hb=440fdb53b4ae58602711b5b8c3a139ace2404dbb;hp=04b1636a970bdd77d1788272d8286dc9b41fdf2e;hpb=489de30259e667d7bc47da9da44a0270b050cd97;p=linux-2.6

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 04b1636a97..3ea68cd3b6 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -24,6 +24,14 @@
 #endif
 #define MAX_ORDER_NR_PAGES (1 << (MAX_ORDER - 1))
 
+/*
+ * PAGE_ALLOC_COSTLY_ORDER is the order at which allocations are deemed
+ * costly to service.  That is between allocation orders which should
+ * coelesce naturally under reasonable reclaim pressure and those which
+ * will not.
+ */
+#define PAGE_ALLOC_COSTLY_ORDER 3
+
 struct free_area {
 	struct list_head	free_list;
 	unsigned long		nr_free;
@@ -112,7 +120,6 @@ enum zone_type {
 	 * ---------------------------
 	 * parisc, ia64, sparc	<4G
 	 * s390			<2G
-	 * arm26		<48M
 	 * arm			Various
 	 * alpha		Unlimited or 0-16MB.
 	 *
@@ -146,6 +153,7 @@ enum zone_type {
 	 */
 	ZONE_HIGHMEM,
 #endif
+	ZONE_MOVABLE,
 	MAX_NR_ZONES
 };
 
@@ -167,6 +175,7 @@ enum zone_type {
 	+ defined(CONFIG_ZONE_DMA32)	\
 	+ 1				\
 	+ defined(CONFIG_HIGHMEM)	\
+	+ 1				\
 )
 #if __ZONE_COUNT < 2
 #define ZONES_SHIFT 0
@@ -499,10 +508,22 @@ static inline int populated_zone(struct zone *zone)
 	return (!!zone->present_pages);
 }
 
+extern int movable_zone;
+
+static inline int zone_movable_is_highmem(void)
+{
+#if defined(CONFIG_HIGHMEM) && defined(CONFIG_ARCH_POPULATES_NODE_MAP)
+	return movable_zone == ZONE_HIGHMEM;
+#else
+	return 0;
+#endif
+}
+
 static inline int is_highmem_idx(enum zone_type idx)
 {
 #ifdef CONFIG_HIGHMEM
-	return (idx == ZONE_HIGHMEM);
+	return (idx == ZONE_HIGHMEM ||
+		(idx == ZONE_MOVABLE && zone_movable_is_highmem()));
 #else
 	return 0;
 #endif
@@ -522,7 +543,9 @@ static inline int is_normal_idx(enum zone_type idx)
 static inline int is_highmem(struct zone *zone)
 {
 #ifdef CONFIG_HIGHMEM
-	return zone == zone->zone_pgdat->node_zones + ZONE_HIGHMEM;
+	int zone_idx = zone - zone->zone_pgdat->node_zones;
+	return zone_idx == ZONE_HIGHMEM ||
+		(zone_idx == ZONE_MOVABLE && zone_movable_is_highmem());
 #else
 	return 0;
 #endif