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Subject[PATCH 12/21] Conversion of nr_pagetables to per zone counter
Subject: zoned vm counters: conversion of nr_pagetable to per zone counter
From: Christoph Lameter <clameter@sgi.com>

Conversion of nr_page_table_pages to a per zone counter

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>

Index: linux-2.6.17-rc6-cl/arch/i386/mm/pgtable.c
===================================================================
--- linux-2.6.17-rc6-cl.orig/arch/i386/mm/pgtable.c 2006-06-13 17:13:31.758785575 -0700
+++ linux-2.6.17-rc6-cl/arch/i386/mm/pgtable.c 2006-06-13 17:14:25.000611421 -0700
@@ -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_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));
}

/*
Index: linux-2.6.17-rc6-cl/fs/proc/proc_misc.c
===================================================================
--- linux-2.6.17-rc6-cl.orig/fs/proc/proc_misc.c 2006-06-13 17:13:31.760738580 -0700
+++ linux-2.6.17-rc6-cl/fs/proc/proc_misc.c 2006-06-13 17:14:05.949054797 -0700
@@ -171,9 +171,9 @@ static int meminfo_read_proc(char *page,
"Anonymous: %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,
K(global_page_state(NR_ANON)),
K(global_page_state(NR_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
Index: linux-2.6.17-rc6-cl/include/linux/mmzone.h
===================================================================
--- linux-2.6.17-rc6-cl.orig/include/linux/mmzone.h 2006-06-13 17:13:31.761715082 -0700
+++ linux-2.6.17-rc6-cl/include/linux/mmzone.h 2006-06-13 17:14:05.950031299 -0700
@@ -52,6 +52,7 @@ enum zone_stat_item {
only modified from process context */
NR_PAGECACHE,
NR_SLAB, /* Pages used by slab allocator */
+ NR_PAGETABLE, /* used for pagetables */
NR_VM_ZONE_STAT_ITEMS };

struct per_cpu_pages {
Index: linux-2.6.17-rc6-cl/mm/memory.c
===================================================================
--- linux-2.6.17-rc6-cl.orig/mm/memory.c 2006-06-12 12:42:52.030113494 -0700
+++ linux-2.6.17-rc6-cl/mm/memory.c 2006-06-13 17:14:05.951984303 -0700
@@ -127,7 +127,7 @@ static void free_pte_range(struct mmu_ga
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--;
}

@@ -312,7 +312,7 @@ int __pte_alloc(struct mm_struct *mm, pm
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);
Index: linux-2.6.17-rc6-cl/mm/page_alloc.c
===================================================================
--- linux-2.6.17-rc6-cl.orig/mm/page_alloc.c 2006-06-13 17:13:31.773433107 -0700
+++ linux-2.6.17-rc6-cl/mm/page_alloc.c 2006-06-13 17:14:05.952960805 -0700
@@ -1410,7 +1410,7 @@ void show_free_areas(void)
nr_free_pages(),
global_page_state(NR_SLAB),
global_page_state(NR_MAPPED),
- ps.nr_page_table_pages);
+ global_page_state(NR_PAGETABLE));

for_each_zone(zone) {
int i;
Index: linux-2.6.17-rc6-cl/drivers/base/node.c
===================================================================
--- linux-2.6.17-rc6-cl.orig/drivers/base/node.c 2006-06-13 17:13:31.759762077 -0700
+++ linux-2.6.17-rc6-cl/drivers/base/node.c 2006-06-13 17:14:05.953937307 -0700
@@ -70,6 +70,7 @@ static ssize_t node_read_meminfo(struct
"Node %d PageCache: %8lu kB\n"
"Node %d Mapped: %8lu kB\n"
"Node %d Anonymous: %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
nid, K(node_page_state(nid, NR_PAGECACHE)),
nid, K(node_page_state(nid, NR_MAPPED)),
nid, K(node_page_state(nid, NR_ANON)),
+ 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;
Index: linux-2.6.17-rc6-cl/arch/um/kernel/skas/mmu.c
===================================================================
--- linux-2.6.17-rc6-cl.orig/arch/um/kernel/skas/mmu.c 2006-06-05 17:57:02.000000000 -0700
+++ linux-2.6.17-rc6-cl/arch/um/kernel/skas/mmu.c 2006-06-13 17:14:05.954913809 -0700
@@ -152,7 +152,7 @@ void destroy_context_skas(struct mm_stru
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
Index: linux-2.6.17-rc6-cl/arch/arm/mm/mm-armv.c
===================================================================
--- linux-2.6.17-rc6-cl.orig/arch/arm/mm/mm-armv.c 2006-06-05 17:57:02.000000000 -0700
+++ linux-2.6.17-rc6-cl/arch/arm/mm/mm-armv.c 2006-06-13 17:14:05.955890311 -0700
@@ -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);
Index: linux-2.6.17-rc6-cl/mm/vmstat.c
===================================================================
--- linux-2.6.17-rc6-cl.orig/mm/vmstat.c 2006-06-13 17:13:31.777339116 -0700
+++ linux-2.6.17-rc6-cl/mm/vmstat.c 2006-06-13 17:14:05.955890311 -0700
@@ -461,12 +461,12 @@ static char *vmstat_text[] = {
"nr_mapped",
"nr_pagecache",
"nr_slab",
+ "nr_page_table_pages",

/* Page state */
"nr_dirty",
"nr_writeback",
"nr_unstable",
- "nr_page_table_pages",

"pgpgin",
"pgpgout",
-
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