/* First 128 byte cacheline (assuming 64 bit words) */
NR_FREE_PAGES,
NR_LRU_BASE,
- NR_INACTIVE = NR_LRU_BASE, /* must match order of LRU_[IN]ACTIVE */
- NR_ACTIVE, /* " " " " " */
+ NR_INACTIVE_ANON = NR_LRU_BASE, /* must match order of LRU_[IN]ACTIVE */
+ NR_ACTIVE_ANON, /* " " " " " */
+ NR_INACTIVE_FILE, /* " " " " " */
+ NR_ACTIVE_FILE, /* " " " " " */
+#ifdef CONFIG_UNEVICTABLE_LRU
+ NR_UNEVICTABLE, /* " " " " " */
+ NR_MLOCK, /* mlock()ed pages found and moved off LRU */
+#else
+ NR_UNEVICTABLE = NR_ACTIVE_FILE, /* avoid compiler errors in dead code */
+ NR_MLOCK = NR_ACTIVE_FILE,
+#endif
NR_ANON_PAGES, /* Mapped anonymous pages */
NR_FILE_MAPPED, /* pagecache pages mapped into pagetables.
only modified from process context */
NR_FILE_PAGES,
NR_FILE_DIRTY,
NR_WRITEBACK,
- /* Second 128 byte cacheline */
NR_SLAB_RECLAIMABLE,
NR_SLAB_UNRECLAIMABLE,
NR_PAGETABLE, /* used for pagetables */
NR_UNSTABLE_NFS, /* NFS unstable pages */
NR_BOUNCE,
NR_VMSCAN_WRITE,
+ /* Second 128 byte cacheline */
NR_WRITEBACK_TEMP, /* Writeback using temporary buffers */
#ifdef CONFIG_NUMA
NUMA_HIT, /* allocated in intended node */
#endif
NR_VM_ZONE_STAT_ITEMS };
+/*
+ * We do arithmetic on the LRU lists in various places in the code,
+ * so it is important to keep the active lists LRU_ACTIVE higher in
+ * the array than the corresponding inactive lists, and to keep
+ * the *_FILE lists LRU_FILE higher than the corresponding _ANON lists.
+ *
+ * This has to be kept in sync with the statistics in zone_stat_item
+ * above and the descriptions in vmstat_text in mm/vmstat.c
+ */
+#define LRU_BASE 0
+#define LRU_ACTIVE 1
+#define LRU_FILE 2
+
enum lru_list {
- LRU_BASE,
- LRU_INACTIVE=LRU_BASE, /* must match order of NR_[IN]ACTIVE */
- LRU_ACTIVE, /* " " " " " */
- NR_LRU_LISTS };
+ LRU_INACTIVE_ANON = LRU_BASE,
+ LRU_ACTIVE_ANON = LRU_BASE + LRU_ACTIVE,
+ LRU_INACTIVE_FILE = LRU_BASE + LRU_FILE,
+ LRU_ACTIVE_FILE = LRU_BASE + LRU_FILE + LRU_ACTIVE,
+#ifdef CONFIG_UNEVICTABLE_LRU
+ LRU_UNEVICTABLE,
+#else
+ LRU_UNEVICTABLE = LRU_ACTIVE_FILE, /* avoid compiler errors in dead code */
+#endif
+ NR_LRU_LISTS
+};
#define for_each_lru(l) for (l = 0; l < NR_LRU_LISTS; l++)
+#define for_each_evictable_lru(l) for (l = 0; l <= LRU_ACTIVE_FILE; l++)
+
+static inline int is_file_lru(enum lru_list l)
+{
+ return (l == LRU_INACTIVE_FILE || l == LRU_ACTIVE_FILE);
+}
+
static inline int is_active_lru(enum lru_list l)
{
- return (l == LRU_ACTIVE);
+ return (l == LRU_ACTIVE_ANON || l == LRU_ACTIVE_FILE);
+}
+
+static inline int is_unevictable_lru(enum lru_list l)
+{
+#ifdef CONFIG_UNEVICTABLE_LRU
+ return (l == LRU_UNEVICTABLE);
+#else
+ return 0;
+#endif
}
struct per_cpu_pages {
#error ZONES_SHIFT -- too many zones configured adjust calculation
#endif
+struct zone_reclaim_stat {
+ /*
+ * The pageout code in vmscan.c keeps track of how many of the
+ * mem/swap backed and file backed pages are refeferenced.
+ * The higher the rotated/scanned ratio, the more valuable
+ * that cache is.
+ *
+ * The anon LRU stats live in [0], file LRU stats in [1]
+ */
+ unsigned long recent_rotated[2];
+ unsigned long recent_scanned[2];
+};
+
struct zone {
/* Fields commonly accessed by the page allocator */
unsigned long pages_min, pages_low, pages_high;
struct list_head list;
unsigned long nr_scan;
} lru[NR_LRU_LISTS];
+
+ struct zone_reclaim_stat reclaim_stat;
+
unsigned long pages_scanned; /* since last reclaim */
unsigned long flags; /* zone flags, see below */
*/
int prev_priority;
+ /*
+ * The target ratio of ACTIVE_ANON to INACTIVE_ANON pages on
+ * this zone's LRU. Maintained by the pageout code.
+ */
+ unsigned int inactive_ratio;
+
ZONE_PADDING(_pad2_)
/* Rarely used or read-mostly fields */
struct zone node_zones[MAX_NR_ZONES];
struct zonelist node_zonelists[MAX_ZONELISTS];
int nr_zones;
-#ifdef CONFIG_FLAT_NODE_MEM_MAP
+#ifdef CONFIG_FLAT_NODE_MEM_MAP /* means !SPARSEMEM */
struct page *node_mem_map;
+#ifdef CONFIG_CGROUP_MEM_RES_CTLR
+ struct page_cgroup *node_page_cgroup;
+#endif
#endif
struct bootmem_data *bdata;
#ifdef CONFIG_MEMORY_HOTPLUG
extern char numa_zonelist_order[];
#define NUMA_ZONELIST_ORDER_LEN 16 /* string buffer size */
-#include <linux/topology.h>
-/* Returns the number of the current Node. */
-#ifndef numa_node_id
-#define numa_node_id() (cpu_to_node(raw_smp_processor_id()))
-#endif
-
#ifndef CONFIG_NEED_MULTIPLE_NODES
extern struct pglist_data contig_page_data;
zone; \
zone = next_zone(zone))
+#define for_each_populated_zone(zone) \
+ for (zone = (first_online_pgdat())->node_zones; \
+ zone; \
+ zone = next_zone(zone)) \
+ if (!populated_zone(zone)) \
+ ; /* do nothing */ \
+ else
+
static inline struct zone *zonelist_zone(struct zoneref *zoneref)
{
return zoneref->zone;
#endif
struct page;
+struct page_cgroup;
struct mem_section {
/*
* This is, logically, a pointer to an array of struct
/* See declaration of similar field in struct zone */
unsigned long *pageblock_flags;
+#ifdef CONFIG_CGROUP_MEM_RES_CTLR
+ /*
+ * If !SPARSEMEM, pgdat doesn't have page_cgroup pointer. We use
+ * section. (see memcontrol.h/page_cgroup.h about this.)
+ */
+ struct page_cgroup *page_cgroup;
+ unsigned long pad;
+#endif
};
#ifdef CONFIG_SPARSEMEM_EXTREME
#endif /* CONFIG_SPARSEMEM */
#ifdef CONFIG_NODES_SPAN_OTHER_NODES
-#define early_pfn_in_nid(pfn, nid) (early_pfn_to_nid(pfn) == (nid))
+bool early_pfn_in_nid(unsigned long pfn, int nid);
#else
#define early_pfn_in_nid(pfn, nid) (1)
#endif
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff