[PATCH] zoned vm counters: conversion of nr_pagetables to per zone counter

Conversion of nr_page_table_pages to a per zone counter

[akpm@osdl.org: bugfix]
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

10 files changed, 14 insertions, 11 deletions

diff --git a/arch/arm/mm/mm-armv.c b/arch/arm/mm/mm-armv.c
index 95273de4f772..931be1798122 100644
--- a/arch/arm/mm/mm-armv.c
+++ b/arch/arm/mm/mm-armv.c
@@ -227,7 +227,7 @@ void free_pgd_slow(pgd_t *pgd)
 
         pte = pmd_page(*pmd);
         pmd_clear(pmd);
-        dec_page_state(nr_page_table_pages);
+        dec_zone_page_state(virt_to_page((unsigned long *)pgd), NR_PAGETABLE);
         pte_lock_deinit(pte);
         pte_free(pte);
         pmd_free(pmd);
diff --git a/arch/i386/mm/pgtable.c b/arch/i386/mm/pgtable.c
index 73ac3599a0ea..0bb1e5c13442 100644
--- a/arch/i386/mm/pgtable.c
+++ b/arch/i386/mm/pgtable.c
@@ -63,7 +63,8 @@ void show_mem(void)
         printk(KERN_INFO "%lu pages writeback\n", ps.nr_writeback);
         printk(KERN_INFO "%lu pages mapped\n", global_page_state(NR_FILE_MAPPED));
         printk(KERN_INFO "%lu pages slab\n", global_page_state(NR_SLAB));
-        printk(KERN_INFO "%lu pages pagetables\n", ps.nr_page_table_pages);
+        printk(KERN_INFO "%lu pages pagetables\n",
+                                        global_page_state(NR_PAGETABLE));
 }
 
 /*
diff --git a/arch/um/kernel/skas/mmu.c b/arch/um/kernel/skas/mmu.c
index c5c9885a8297..624ca238d1fd 100644
--- a/arch/um/kernel/skas/mmu.c
+++ b/arch/um/kernel/skas/mmu.c
@@ -152,7 +152,7 @@ void destroy_context_skas(struct mm_struct *mm)
                 free_page(mmu->id.stack);
                 pte_lock_deinit(virt_to_page(mmu->last_page_table));
                 pte_free_kernel((pte_t *) mmu->last_page_table);
-                dec_page_state(nr_page_table_pages);
+                dec_zone_page_state(virt_to_page(mmu->last_page_table), NR_PAGETABLE);
 #ifdef CONFIG_3_LEVEL_PGTABLES
                 pmd_free((pmd_t *) mmu->last_pmd);
 #endif
diff --git a/drivers/base/node.c b/drivers/base/node.c
index db116a8791c8..c22fb67ec50c 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -70,6 +70,7 @@ static ssize_t node_read_meminfo(struct sys_device * dev, char * buf)
                        "Node %d FilePages:    %8lu kB\n"
                        "Node %d Mapped:       %8lu kB\n"
                        "Node %d AnonPages:    %8lu kB\n"
+                       "Node %d PageTables:   %8lu kB\n"
                        "Node %d Slab:         %8lu kB\n",
                        nid, K(i.totalram),
                        nid, K(i.freeram),
@@ -85,6 +86,7 @@ static ssize_t node_read_meminfo(struct sys_device * dev, char * buf)
                        nid, K(node_page_state(nid, NR_FILE_PAGES)),
                        nid, K(node_page_state(nid, NR_FILE_MAPPED)),
                        nid, K(node_page_state(nid, NR_ANON_PAGES)),
+                       nid, K(node_page_state(nid, NR_PAGETABLE)),
                        nid, K(node_page_state(nid, NR_SLAB)));
         n += hugetlb_report_node_meminfo(nid, buf + n);
         return n;
diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c
index 16aaf7187bb3..0eae68f84210 100644
--- a/fs/proc/proc_misc.c
+++ b/fs/proc/proc_misc.c
@@ -171,9 +171,9 @@ static int meminfo_read_proc(char *page, char **start, off_t off,
                 "AnonPages:    %8lu kB\n"
                 "Mapped:       %8lu kB\n"
                 "Slab:         %8lu kB\n"
+                "PageTables:   %8lu kB\n"
                 "CommitLimit:  %8lu kB\n"
                 "Committed_AS: %8lu kB\n"
-                "PageTables:   %8lu kB\n"
                 "VmallocTotal: %8lu kB\n"
                 "VmallocUsed:  %8lu kB\n"
                 "VmallocChunk: %8lu kB\n",
@@ -195,9 +195,9 @@ static int meminfo_read_proc(char *page, char **start, off_t off,
                 K(global_page_state(NR_ANON_PAGES)),
                 K(global_page_state(NR_FILE_MAPPED)),
                 K(global_page_state(NR_SLAB)),
+                K(global_page_state(NR_PAGETABLE)),
                 K(allowed),
                 K(committed),
-                K(ps.nr_page_table_pages),
                 (unsigned long)VMALLOC_TOTAL >> 10,
                 vmi.used >> 10,
                 vmi.largest_chunk >> 10
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 67e03fc8533e..15adb435f240 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -52,6 +52,7 @@ enum zone_stat_item {
                            only modified from process context */
         NR_FILE_PAGES,
         NR_SLAB,        /* Pages used by slab allocator */
+        NR_PAGETABLE,   /* used for pagetables */
         NR_VM_ZONE_STAT_ITEMS };
 
 struct per_cpu_pages {
diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h
index 4b97381a2937..56220441d7c9 100644
--- a/include/linux/vmstat.h
+++ b/include/linux/vmstat.h
@@ -25,8 +25,7 @@ struct page_state {
         unsigned long nr_dirty;         /* Dirty writeable pages */
         unsigned long nr_writeback;     /* Pages under writeback */
         unsigned long nr_unstable;      /* NFS unstable pages */
-        unsigned long nr_page_table_pages;/* Pages used for pagetables */
-#define GET_PAGE_STATE_LAST nr_page_table_pages
+#define GET_PAGE_STATE_LAST nr_unstable
 
         /*
          * The below are zeroed by get_page_state().  Use get_full_page_state()
diff --git a/mm/memory.c b/mm/memory.c
index 247b5c312b9b..1a78791590fa 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -126,7 +126,7 @@ static void free_pte_range(struct mmu_gather *tlb, pmd_t *pmd)
         pmd_clear(pmd);
         pte_lock_deinit(page);
         pte_free_tlb(tlb, page);
-        dec_page_state(nr_page_table_pages);
+        dec_zone_page_state(page, NR_PAGETABLE);
         tlb->mm->nr_ptes--;
 }
 
@@ -311,7 +311,7 @@ int __pte_alloc(struct mm_struct *mm, pmd_t *pmd, unsigned long address)
                 pte_free(new);
         } else {
                 mm->nr_ptes++;
-                inc_page_state(nr_page_table_pages);
+                inc_zone_page_state(new, NR_PAGETABLE);
                 pmd_populate(mm, pmd, new);
         }
         spin_unlock(&mm->page_table_lock);
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index a38a11cfb483..ed3f2a7b4071 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1320,7 +1320,7 @@ void show_free_areas(void)
                 nr_free_pages(),
                 global_page_state(NR_SLAB),
                 global_page_state(NR_FILE_MAPPED),
-                ps.nr_page_table_pages);
+                global_page_state(NR_PAGETABLE));
 
         for_each_zone(zone) {
                 int i;
diff --git a/mm/vmstat.c b/mm/vmstat.c
index dc9e69209223..292a35fe56c9 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -399,12 +399,12 @@ static char *vmstat_text[] = {
         "nr_mapped",
         "nr_file_pages",
         "nr_slab",
+        "nr_page_table_pages",
 
         /* Page state */
         "nr_dirty",
         "nr_writeback",
         "nr_unstable",
-        "nr_page_table_pages",
 
         "pgpgin",
         "pgpgout",