1 files changed, 13 insertions, 459 deletions

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 60f2feddbe5d..3e792a583f3b 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -455,7 +455,7 @@ static void __free_pages_ok(struct page *page, unsigned int order)
 
         kernel_map_pages(page, 1 << order, 0);
         local_irq_save(flags);
-        __mod_page_state(pgfree, 1 << order);
+        __count_vm_events(PGFREE, 1 << order);
         free_one_page(page_zone(page), page, order);
         local_irq_restore(flags);
 }
@@ -708,27 +708,6 @@ void drain_local_pages(void)
 }
 #endif /* CONFIG_PM */
 
-static void zone_statistics(struct zonelist *zonelist, struct zone *z, int cpu)
-{
-#ifdef CONFIG_NUMA
-        pg_data_t *pg = z->zone_pgdat;
-        pg_data_t *orig = zonelist->zones[0]->zone_pgdat;
-        struct per_cpu_pageset *p;
-
-        p = zone_pcp(z, cpu);
-        if (pg == orig) {
-                p->numa_hit++;
-        } else {
-                p->numa_miss++;
-                zone_pcp(zonelist->zones[0], cpu)->numa_foreign++;
-        }
-        if (pg == NODE_DATA(numa_node_id()))
-                p->local_node++;
-        else
-                p->other_node++;
-#endif
-}
-
 /*
  * Free a 0-order page
  */
@@ -749,7 +728,7 @@ static void fastcall free_hot_cold_page(struct page *page, int cold)
 
         pcp = &zone_pcp(zone, get_cpu())->pcp[cold];
         local_irq_save(flags);
-        __inc_page_state(pgfree);
+        __count_vm_event(PGFREE);
         list_add(&page->lru, &pcp->list);
         pcp->count++;
         if (pcp->count >= pcp->high) {
@@ -825,8 +804,8 @@ again:
                         goto failed;
         }
 
-        __mod_page_state_zone(zone, pgalloc, 1 << order);
-        zone_statistics(zonelist, zone, cpu);
+        __count_zone_vm_events(PGALLOC, zone, 1 << order);
+        zone_statistics(zonelist, zone);
         local_irq_restore(flags);
         put_cpu();
 
@@ -1230,141 +1209,6 @@ static void show_node(struct zone *zone)
 #define show_node(zone) do { } while (0)
 #endif
 
-/*
- * Accumulate the page_state information across all CPUs.
- * The result is unavoidably approximate - it can change
- * during and after execution of this function.
- */
-static DEFINE_PER_CPU(struct page_state, page_states) = {0};
-
-atomic_t nr_pagecache = ATOMIC_INIT(0);
-EXPORT_SYMBOL(nr_pagecache);
-#ifdef CONFIG_SMP
-DEFINE_PER_CPU(long, nr_pagecache_local) = 0;
-#endif
-
-static void __get_page_state(struct page_state *ret, int nr, cpumask_t *cpumask)
-{
-        unsigned cpu;
-
-        memset(ret, 0, nr * sizeof(unsigned long));
-        cpus_and(*cpumask, *cpumask, cpu_online_map);
-
-        for_each_cpu_mask(cpu, *cpumask) {
-                unsigned long *in;
-                unsigned long *out;
-                unsigned off;
-                unsigned next_cpu;
-
-                in = (unsigned long *)&per_cpu(page_states, cpu);
-
-                next_cpu = next_cpu(cpu, *cpumask);
-                if (likely(next_cpu < NR_CPUS))
-                        prefetch(&per_cpu(page_states, next_cpu));
-
-                out = (unsigned long *)ret;
-                for (off = 0; off < nr; off++)
-                        *out++ += *in++;
-        }
-}
-
-void get_page_state_node(struct page_state *ret, int node)
-{
-        int nr;
-        cpumask_t mask = node_to_cpumask(node);
-
-        nr = offsetof(struct page_state, GET_PAGE_STATE_LAST);
-        nr /= sizeof(unsigned long);
-
-        __get_page_state(ret, nr+1, &mask);
-}
-
-void get_page_state(struct page_state *ret)
-{
-        int nr;
-        cpumask_t mask = CPU_MASK_ALL;
-
-        nr = offsetof(struct page_state, GET_PAGE_STATE_LAST);
-        nr /= sizeof(unsigned long);
-
-        __get_page_state(ret, nr + 1, &mask);
-}
-
-void get_full_page_state(struct page_state *ret)
-{
-        cpumask_t mask = CPU_MASK_ALL;
-
-        __get_page_state(ret, sizeof(*ret) / sizeof(unsigned long), &mask);
-}
-
-unsigned long read_page_state_offset(unsigned long offset)
-{
-        unsigned long ret = 0;
-        int cpu;
-
-        for_each_online_cpu(cpu) {
-                unsigned long in;
-
-                in = (unsigned long)&per_cpu(page_states, cpu) + offset;
-                ret += *((unsigned long *)in);
-        }
-        return ret;
-}
-
-void __mod_page_state_offset(unsigned long offset, unsigned long delta)
-{
-        void *ptr;
-
-        ptr = &__get_cpu_var(page_states);
-        *(unsigned long *)(ptr + offset) += delta;
-}
-EXPORT_SYMBOL(__mod_page_state_offset);
-
-void mod_page_state_offset(unsigned long offset, unsigned long delta)
-{
-        unsigned long flags;
-        void *ptr;
-
-        local_irq_save(flags);
-        ptr = &__get_cpu_var(page_states);
-        *(unsigned long *)(ptr + offset) += delta;
-        local_irq_restore(flags);
-}
-EXPORT_SYMBOL(mod_page_state_offset);
-
-void __get_zone_counts(unsigned long *active, unsigned long *inactive,
-                        unsigned long *free, struct pglist_data *pgdat)
-{
-        struct zone *zones = pgdat->node_zones;
-        int i;
-
-        *active = 0;
-        *inactive = 0;
-        *free = 0;
-        for (i = 0; i < MAX_NR_ZONES; i++) {
-                *active += zones[i].nr_active;
-                *inactive += zones[i].nr_inactive;
-                *free += zones[i].free_pages;
-        }
-}
-
-void get_zone_counts(unsigned long *active,
-                unsigned long *inactive, unsigned long *free)
-{
-        struct pglist_data *pgdat;
-
-        *active = 0;
-        *inactive = 0;
-        *free = 0;
-        for_each_online_pgdat(pgdat) {
-                unsigned long l, m, n;
-                __get_zone_counts(&l, &m, &n, pgdat);
-                *active += l;
-                *inactive += m;
-                *free += n;
-        }
-}
-
 void si_meminfo(struct sysinfo *val)
 {
         val->totalram = totalram_pages;
@@ -1405,7 +1249,6 @@ void si_meminfo_node(struct sysinfo *val, int nid)
  */
 void show_free_areas(void)
 {
-        struct page_state ps;
         int cpu, temperature;
         unsigned long active;
         unsigned long inactive;
@@ -1437,7 +1280,6 @@ void show_free_areas(void)
                 }
         }
 
-        get_page_state(&ps);
         get_zone_counts(&active, &inactive, &free);
 
         printk("Free pages: %11ukB (%ukB HighMem)\n",
@@ -1448,13 +1290,13 @@ void show_free_areas(void)
                 "unstable:%lu free:%u slab:%lu mapped:%lu pagetables:%lu\n",
                 active,
                 inactive,
-                ps.nr_dirty,
-                ps.nr_writeback,
-                ps.nr_unstable,
+                global_page_state(NR_FILE_DIRTY),
+                global_page_state(NR_WRITEBACK),
+                global_page_state(NR_UNSTABLE_NFS),
                 nr_free_pages(),
-                ps.nr_slab,
-                ps.nr_mapped,
-                ps.nr_page_table_pages);
+                global_page_state(NR_SLAB),
+                global_page_state(NR_FILE_MAPPED),
+                global_page_state(NR_PAGETABLE));
 
         for_each_zone(zone) {
                 int i;
@@ -2179,6 +2021,7 @@ static void __meminit free_area_init_core(struct pglist_data *pgdat,
                 zone->nr_scan_inactive = 0;
                 zone->nr_active = 0;
                 zone->nr_inactive = 0;
+                zap_zone_vm_stats(zone);
                 atomic_set(&zone->reclaim_in_progress, 0);
                 if (!size)
                         continue;
@@ -2252,307 +2095,18 @@ void __init free_area_init(unsigned long *zones_size)
                         __pa(PAGE_OFFSET) >> PAGE_SHIFT, NULL);
 }
 
-#ifdef CONFIG_PROC_FS
-
-#include <linux/seq_file.h>
-
-static void *frag_start(struct seq_file *m, loff_t *pos)
-{
-        pg_data_t *pgdat;
-        loff_t node = *pos;
-        for (pgdat = first_online_pgdat();
-             pgdat && node;
-             pgdat = next_online_pgdat(pgdat))
-                --node;
-
-        return pgdat;
-}
-
-static void *frag_next(struct seq_file *m, void *arg, loff_t *pos)
-{
-        pg_data_t *pgdat = (pg_data_t *)arg;
-
-        (*pos)++;
-        return next_online_pgdat(pgdat);
-}
-
-static void frag_stop(struct seq_file *m, void *arg)
-{
-}
-
-/* 
- * This walks the free areas for each zone.
- */
-static int frag_show(struct seq_file *m, void *arg)
-{
-        pg_data_t *pgdat = (pg_data_t *)arg;
-        struct zone *zone;
-        struct zone *node_zones = pgdat->node_zones;
-        unsigned long flags;
-        int order;
-
-        for (zone = node_zones; zone - node_zones < MAX_NR_ZONES; ++zone) {
-                if (!populated_zone(zone))
-                        continue;
-
-                spin_lock_irqsave(&zone->lock, flags);
-                seq_printf(m, "Node %d, zone %8s ", pgdat->node_id, zone->name);
-                for (order = 0; order < MAX_ORDER; ++order)
-                        seq_printf(m, "%6lu ", zone->free_area[order].nr_free);
-                spin_unlock_irqrestore(&zone->lock, flags);
-                seq_putc(m, '\n');
-        }
-        return 0;
-}
-
-struct seq_operations fragmentation_op = {
-        .start  = frag_start,
-        .next   = frag_next,
-        .stop   = frag_stop,
-        .show   = frag_show,
-};
-
-/*
- * Output information about zones in @pgdat.
- */
-static int zoneinfo_show(struct seq_file *m, void *arg)
-{
-        pg_data_t *pgdat = arg;
-        struct zone *zone;
-        struct zone *node_zones = pgdat->node_zones;
-        unsigned long flags;
-
-        for (zone = node_zones; zone - node_zones < MAX_NR_ZONES; zone++) {
-                int i;
-
-                if (!populated_zone(zone))
-                        continue;
-
-                spin_lock_irqsave(&zone->lock, flags);
-                seq_printf(m, "Node %d, zone %8s", pgdat->node_id, zone->name);
-                seq_printf(m,
-                           "\n  pages free     %lu"
-                           "\n        min      %lu"
-                           "\n        low      %lu"
-                           "\n        high     %lu"
-                           "\n        active   %lu"
-                           "\n        inactive %lu"
-                           "\n        scanned  %lu (a: %lu i: %lu)"
-                           "\n        spanned  %lu"
-                           "\n        present  %lu",
-                           zone->free_pages,
-                           zone->pages_min,
-                           zone->pages_low,
-                           zone->pages_high,
-                           zone->nr_active,
-                           zone->nr_inactive,
-                           zone->pages_scanned,
-                           zone->nr_scan_active, zone->nr_scan_inactive,
-                           zone->spanned_pages,
-                           zone->present_pages);
-                seq_printf(m,
-                           "\n        protection: (%lu",
-                           zone->lowmem_reserve[0]);
-                for (i = 1; i < ARRAY_SIZE(zone->lowmem_reserve); i++)
-                        seq_printf(m, ", %lu", zone->lowmem_reserve[i]);
-                seq_printf(m,
-                           ")"
-                           "\n  pagesets");
-                for_each_online_cpu(i) {
-                        struct per_cpu_pageset *pageset;
-                        int j;
-
-                        pageset = zone_pcp(zone, i);
-                        for (j = 0; j < ARRAY_SIZE(pageset->pcp); j++) {
-                                if (pageset->pcp[j].count)
-                                        break;
-                        }
-                        if (j == ARRAY_SIZE(pageset->pcp))
-                                continue;
-                        for (j = 0; j < ARRAY_SIZE(pageset->pcp); j++) {
-                                seq_printf(m,
-                                           "\n    cpu: %i pcp: %i"
-                                           "\n              count: %i"
-                                           "\n              high:  %i"
-                                           "\n              batch: %i",
-                                           i, j,
-                                           pageset->pcp[j].count,
-                                           pageset->pcp[j].high,
-                                           pageset->pcp[j].batch);
-                        }
-#ifdef CONFIG_NUMA
-                        seq_printf(m,
-                                   "\n            numa_hit:       %lu"
-                                   "\n            numa_miss:      %lu"
-                                   "\n            numa_foreign:   %lu"
-                                   "\n            interleave_hit: %lu"
-                                   "\n            local_node:     %lu"
-                                   "\n            other_node:     %lu",
-                                   pageset->numa_hit,
-                                   pageset->numa_miss,
-                                   pageset->numa_foreign,
-                                   pageset->interleave_hit,
-                                   pageset->local_node,
-                                   pageset->other_node);
-#endif
-                }
-                seq_printf(m,
-                           "\n  all_unreclaimable: %u"
-                           "\n  prev_priority:     %i"
-                           "\n  temp_priority:     %i"
-                           "\n  start_pfn:         %lu",
-                           zone->all_unreclaimable,
-                           zone->prev_priority,
-                           zone->temp_priority,
-                           zone->zone_start_pfn);
-                spin_unlock_irqrestore(&zone->lock, flags);
-                seq_putc(m, '\n');
-        }
-        return 0;
-}
-
-struct seq_operations zoneinfo_op = {
-        .start  = frag_start, /* iterate over all zones. The same as in
-                               * fragmentation. */
-        .next   = frag_next,
-        .stop   = frag_stop,
-        .show   = zoneinfo_show,
-};
-
-static char *vmstat_text[] = {
-        "nr_dirty",
-        "nr_writeback",
-        "nr_unstable",
-        "nr_page_table_pages",
-        "nr_mapped",
-        "nr_slab",
-
-        "pgpgin",
-        "pgpgout",
-        "pswpin",
-        "pswpout",
-
-        "pgalloc_high",
-        "pgalloc_normal",
-        "pgalloc_dma32",
-        "pgalloc_dma",
-
-        "pgfree",
-        "pgactivate",
-        "pgdeactivate",
-
-        "pgfault",
-        "pgmajfault",
-
-        "pgrefill_high",
-        "pgrefill_normal",
-        "pgrefill_dma32",
-        "pgrefill_dma",
-
-        "pgsteal_high",
-        "pgsteal_normal",
-        "pgsteal_dma32",
-        "pgsteal_dma",
-
-        "pgscan_kswapd_high",
-        "pgscan_kswapd_normal",
-        "pgscan_kswapd_dma32",
-        "pgscan_kswapd_dma",
-
-        "pgscan_direct_high",
-        "pgscan_direct_normal",
-        "pgscan_direct_dma32",
-        "pgscan_direct_dma",
-
-        "pginodesteal",
-        "slabs_scanned",
-        "kswapd_steal",
-        "kswapd_inodesteal",
-        "pageoutrun",
-        "allocstall",
-
-        "pgrotated",
-        "nr_bounce",
-};
-
-static void *vmstat_start(struct seq_file *m, loff_t *pos)
-{
-        struct page_state *ps;
-
-        if (*pos >= ARRAY_SIZE(vmstat_text))
-                return NULL;
-
-        ps = kmalloc(sizeof(*ps), GFP_KERNEL);
-        m->private = ps;
-        if (!ps)
-                return ERR_PTR(-ENOMEM);
-        get_full_page_state(ps);
-        ps->pgpgin /= 2;                /* sectors -> kbytes */
-        ps->pgpgout /= 2;
-        return (unsigned long *)ps + *pos;
-}
-
-static void *vmstat_next(struct seq_file *m, void *arg, loff_t *pos)
-{
-        (*pos)++;
-        if (*pos >= ARRAY_SIZE(vmstat_text))
-                return NULL;
-        return (unsigned long *)m->private + *pos;
-}
-
-static int vmstat_show(struct seq_file *m, void *arg)
-{
-        unsigned long *l = arg;
-        unsigned long off = l - (unsigned long *)m->private;
-
-        seq_printf(m, "%s %lu\n", vmstat_text[off], *l);
-        return 0;
-}
-
-static void vmstat_stop(struct seq_file *m, void *arg)
-{
-        kfree(m->private);
-        m->private = NULL;
-}
-
-struct seq_operations vmstat_op = {
-        .start  = vmstat_start,
-        .next   = vmstat_next,
-        .stop   = vmstat_stop,
-        .show   = vmstat_show,
-};
-
-#endif /* CONFIG_PROC_FS */
-
 #ifdef CONFIG_HOTPLUG_CPU
 static int page_alloc_cpu_notify(struct notifier_block *self,
                                  unsigned long action, void *hcpu)
 {
         int cpu = (unsigned long)hcpu;
-        long *count;
-        unsigned long *src, *dest;
 
         if (action == CPU_DEAD) {
-                int i;
-
-                /* Drain local pagecache count. */
-                count = &per_cpu(nr_pagecache_local, cpu);
-                atomic_add(*count, &nr_pagecache);
-                *count = 0;
                 local_irq_disable();
                 __drain_pages(cpu);
-
-                /* Add dead cpu's page_states to our own. */
-                dest = (unsigned long *)&__get_cpu_var(page_states);
-                src = (unsigned long *)&per_cpu(page_states, cpu);
-
-                for (i = 0; i < sizeof(struct page_state)/sizeof(unsigned long);
-                                i++) {
-                        dest[i] += src[i];
-                        src[i] = 0;
-                }
-
+                vm_events_fold_cpu(cpu);
                 local_irq_enable();
+                refresh_cpu_vm_stats(cpu);
         }
         return NOTIFY_OK;
 }