[PATCH 16/27] mm: Move page mapped accounting to the node

[Mel Gorman <mgorman@techsingularity.net>]

Reclaim makes decisions based on the number of pages that are mapped
but it's mixing node and zone information. Account NR_FILE_MAPPED and
NR_ANON_PAGES pages on the node.

Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
---
 arch/tile/mm/pgtable.c |  2 +-
 drivers/base/node.c    |  4 ++--
 fs/proc/meminfo.c      |  4 ++--
 include/linux/mmzone.h |  6 +++---
 mm/page_alloc.c        |  6 +++---
 mm/rmap.c              | 12 ++++++------
 mm/vmscan.c            |  2 +-
 mm/vmstat.c            |  4 ++--
 8 files changed, 20 insertions(+), 20 deletions(-)

diff --git a/arch/tile/mm/pgtable.c b/arch/tile/mm/pgtable.c
index 9e389213580d..c606b0ef2f7e 100644
--- a/arch/tile/mm/pgtable.c
+++ b/arch/tile/mm/pgtable.c
@@ -55,7 +55,7 @@ void show_mem(unsigned int filter)
 	       global_page_state(NR_FREE_PAGES),
 	       (global_page_state(NR_SLAB_RECLAIMABLE) +
 		global_page_state(NR_SLAB_UNRECLAIMABLE)),
-	       global_page_state(NR_FILE_MAPPED),
+	       global_node_page_state(NR_FILE_MAPPED),
 	       global_page_state(NR_PAGETABLE),
 	       global_page_state(NR_BOUNCE),
 	       global_page_state(NR_FILE_PAGES),
diff --git a/drivers/base/node.c b/drivers/base/node.c
index 4260c7f3ee1b..66aed68a0fdc 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -119,8 +119,8 @@ static ssize_t node_read_meminfo(struct device *dev,
 		       nid, K(sum_zone_node_page_state(nid, NR_FILE_DIRTY)),
 		       nid, K(sum_zone_node_page_state(nid, NR_WRITEBACK)),
 		       nid, K(sum_zone_node_page_state(nid, NR_FILE_PAGES)),
-		       nid, K(sum_zone_node_page_state(nid, NR_FILE_MAPPED)),
-		       nid, K(sum_zone_node_page_state(nid, NR_ANON_PAGES)),
+		       nid, K(node_page_state(pgdat, NR_FILE_MAPPED)),
+		       nid, K(node_page_state(pgdat, NR_ANON_PAGES)),
 		       nid, K(i.sharedram),
 		       nid, sum_zone_node_page_state(nid, NR_KERNEL_STACK) *
 				THREAD_SIZE / 1024,
diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c
index 83720460c5bc..54e039682ec9 100644
--- a/fs/proc/meminfo.c
+++ b/fs/proc/meminfo.c
@@ -138,8 +138,8 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
 		K(i.freeswap),
 		K(global_page_state(NR_FILE_DIRTY)),
 		K(global_page_state(NR_WRITEBACK)),
-		K(global_page_state(NR_ANON_PAGES)),
-		K(global_page_state(NR_FILE_MAPPED)),
+		K(global_node_page_state(NR_ANON_PAGES)),
+		K(global_node_page_state(NR_FILE_MAPPED)),
 		K(i.sharedram),
 		K(global_page_state(NR_SLAB_RECLAIMABLE) +
 				global_page_state(NR_SLAB_UNRECLAIMABLE)),
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index ca9e05ca851d..8fafbd5fe74a 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -115,9 +115,6 @@ enum zone_stat_item {
 	NR_ZONE_LRU_ANON = NR_ZONE_LRU_BASE,
 	NR_ZONE_LRU_FILE,
 	NR_MLOCK,		/* mlock()ed pages found and moved off LRU */
-	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,
@@ -162,6 +159,9 @@ enum node_stat_item {
 	WORKINGSET_REFAULT,
 	WORKINGSET_ACTIVATE,
 	WORKINGSET_NODERECLAIM,
+	NR_ANON_PAGES,	/* Mapped anonymous pages */
+	NR_FILE_MAPPED,	/* pagecache pages mapped into pagetables.
+			   only modified from process context */
 	NR_VM_NODE_STAT_ITEMS
 };
 
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 962e98e54fd2..cf3523f399e5 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -4314,7 +4314,7 @@ void show_free_areas(unsigned int filter)
 		global_page_state(NR_UNSTABLE_NFS),
 		global_page_state(NR_SLAB_RECLAIMABLE),
 		global_page_state(NR_SLAB_UNRECLAIMABLE),
-		global_page_state(NR_FILE_MAPPED),
+		global_node_page_state(NR_FILE_MAPPED),
 		global_page_state(NR_SHMEM),
 		global_page_state(NR_PAGETABLE),
 		global_page_state(NR_BOUNCE),
@@ -4331,6 +4331,7 @@ void show_free_areas(unsigned int filter)
 			" unevictable:%lukB"
 			" isolated(anon):%lukB"
 			" isolated(file):%lukB"
+			" mapped:%lukB"
 			" all_unreclaimable? %s"
 			"\n",
 			pgdat->node_id,
@@ -4341,6 +4342,7 @@ void show_free_areas(unsigned int filter)
 			K(node_page_state(pgdat, NR_UNEVICTABLE)),
 			K(node_page_state(pgdat, NR_ISOLATED_ANON)),
 			K(node_page_state(pgdat, NR_ISOLATED_FILE)),
+			K(node_page_state(pgdat, NR_FILE_MAPPED)),
 			!pgdat_reclaimable(pgdat) ? "yes" : "no");
 	}
 
@@ -4365,7 +4367,6 @@ void show_free_areas(unsigned int filter)
 			" mlocked:%lukB"
 			" dirty:%lukB"
 			" writeback:%lukB"
-			" mapped:%lukB"
 			" shmem:%lukB"
 			" slab_reclaimable:%lukB"
 			" slab_unreclaimable:%lukB"
@@ -4389,7 +4390,6 @@ void show_free_areas(unsigned int filter)
 			K(zone_page_state(zone, NR_MLOCK)),
 			K(zone_page_state(zone, NR_FILE_DIRTY)),
 			K(zone_page_state(zone, NR_WRITEBACK)),
-			K(zone_page_state(zone, NR_FILE_MAPPED)),
 			K(zone_page_state(zone, NR_SHMEM)),
 			K(zone_page_state(zone, NR_SLAB_RECLAIMABLE)),
 			K(zone_page_state(zone, NR_SLAB_UNRECLAIMABLE)),
diff --git a/mm/rmap.c b/mm/rmap.c
index 67457f691528..dea2d115d68f 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -1219,7 +1219,7 @@ void do_page_add_anon_rmap(struct page *page,
 			__inc_zone_page_state(page,
 					      NR_ANON_TRANSPARENT_HUGEPAGES);
 		}
-		__mod_zone_page_state(page_zone(page), NR_ANON_PAGES, nr);
+		__mod_node_page_state(page_pgdat(page), NR_ANON_PAGES, nr);
 	}
 	if (unlikely(PageKsm(page)))
 		return;
@@ -1263,7 +1263,7 @@ void page_add_new_anon_rmap(struct page *page,
 		/* increment count (starts at -1) */
 		atomic_set(&page->_mapcount, 0);
 	}
-	__mod_zone_page_state(page_zone(page), NR_ANON_PAGES, nr);
+	__mod_node_page_state(page_pgdat(page), NR_ANON_PAGES, nr);
 	__page_set_anon_rmap(page, vma, address, 1);
 }
 
@@ -1277,7 +1277,7 @@ void page_add_file_rmap(struct page *page)
 {
 	lock_page_memcg(page);
 	if (atomic_inc_and_test(&page->_mapcount)) {
-		__inc_zone_page_state(page, NR_FILE_MAPPED);
+		__inc_node_page_state(page, NR_FILE_MAPPED);
 		mem_cgroup_inc_page_stat(page, MEM_CGROUP_STAT_FILE_MAPPED);
 	}
 	unlock_page_memcg(page);
@@ -1303,7 +1303,7 @@ static void page_remove_file_rmap(struct page *page)
 	 * these counters are not modified in interrupt context, and
 	 * pte lock(a spinlock) is held, which implies preemption disabled.
 	 */
-	__dec_zone_page_state(page, NR_FILE_MAPPED);
+	__dec_node_page_state(page, NR_FILE_MAPPED);
 	mem_cgroup_dec_page_stat(page, MEM_CGROUP_STAT_FILE_MAPPED);
 
 	if (unlikely(PageMlocked(page)))
@@ -1345,7 +1345,7 @@ static void page_remove_anon_compound_rmap(struct page *page)
 		clear_page_mlock(page);
 
 	if (nr) {
-		__mod_zone_page_state(page_zone(page), NR_ANON_PAGES, -nr);
+		__mod_node_page_state(page_pgdat(page), NR_ANON_PAGES, -nr);
 		deferred_split_huge_page(page);
 	}
 }
@@ -1377,7 +1377,7 @@ void page_remove_rmap(struct page *page, bool compound)
 	 * these counters are not modified in interrupt context, and
 	 * pte lock(a spinlock) is held, which implies preemption disabled.
 	 */
-	__dec_zone_page_state(page, NR_ANON_PAGES);
+	__dec_node_page_state(page, NR_ANON_PAGES);
 
 	if (unlikely(PageMlocked(page)))
 		clear_page_mlock(page);
diff --git a/mm/vmscan.c b/mm/vmscan.c
index cf73bf4ebd06..c6e958079398 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -3596,7 +3596,7 @@ int sysctl_min_slab_ratio = 5;
 
 static inline unsigned long zone_unmapped_file_pages(struct zone *zone)
 {
-	unsigned long file_mapped = zone_page_state(zone, NR_FILE_MAPPED);
+	unsigned long file_mapped = node_page_state(zone->zone_pgdat, NR_FILE_MAPPED);
 	unsigned long file_lru = node_page_state(zone->zone_pgdat, NR_INACTIVE_FILE) +
 		node_page_state(zone->zone_pgdat, NR_ACTIVE_FILE);
 
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 81da18616ce6..12022ed481f0 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -924,8 +924,6 @@ const char * const vmstat_text[] = {
 	"nr_zone_anon_lru",
 	"nr_zone_file_lru",
 	"nr_mlock",
-	"nr_anon_pages",
-	"nr_mapped",
 	"nr_file_pages",
 	"nr_dirty",
 	"nr_writeback",
@@ -967,6 +965,8 @@ const char * const vmstat_text[] = {
 	"workingset_refault",
 	"workingset_activate",
 	"workingset_nodereclaim",
+	"nr_anon_pages",
+	"nr_mapped",
 
 	/* enum writeback_stat_item counters */
 	"nr_dirty_threshold",
-- 
2.6.4