unsigned long totalram_pages __read_mostly;
unsigned long totalhigh_pages __read_mostly;
long nr_swap_pages;
+int percpu_pagelist_fraction;
static void fastcall free_hot_cold_page(struct page *page, int cold);
* -- wli
*/
-static inline void __free_pages_bulk (struct page *page,
+static inline void __free_one_page(struct page *page,
struct zone *zone, unsigned int order)
{
unsigned long page_idx;
* And clear the zone's pages_scanned counter, to hold off the "all pages are
* pinned" detection logic.
*/
-static int
-free_pages_bulk(struct zone *zone, int count,
- struct list_head *list, unsigned int order)
+static void free_pages_bulk(struct zone *zone, int count,
+ struct list_head *list, int order)
{
- struct page *page = NULL;
- int ret = 0;
-
spin_lock(&zone->lock);
zone->all_unreclaimable = 0;
zone->pages_scanned = 0;
- while (!list_empty(list) && count--) {
+ while (count--) {
+ struct page *page;
+
+ BUG_ON(list_empty(list));
page = list_entry(list->prev, struct page, lru);
- /* have to delete it as __free_pages_bulk list manipulates */
+ /* have to delete it as __free_one_page list manipulates */
list_del(&page->lru);
- __free_pages_bulk(page, zone, order);
- ret++;
+ __free_one_page(page, zone, order);
}
spin_unlock(&zone->lock);
- return ret;
}
-void __free_pages_ok(struct page *page, unsigned int order)
+static void free_one_page(struct zone *zone, struct page *page, int order)
{
- unsigned long flags;
LIST_HEAD(list);
+ list_add(&page->lru, &list);
+ free_pages_bulk(zone, 1, &list, order);
+}
+
+static void __free_pages_ok(struct page *page, unsigned int order)
+{
+ unsigned long flags;
int i;
int reserved = 0;
arch_free_page(page, order);
+ if (!PageHighMem(page))
+ mutex_debug_check_no_locks_freed(page_address(page),
+ page_address(page+(1<<order)));
#ifndef CONFIG_MMU
- if (order > 0)
- for (i = 1 ; i < (1 << order) ; ++i)
- __put_page(page + i);
+ for (i = 1 ; i < (1 << order) ; ++i)
+ __put_page(page + i);
#endif
for (i = 0 ; i < (1 << order) ; ++i)
if (reserved)
return;
- list_add(&page->lru, &list);
- mod_page_state(pgfree, 1 << order);
- kernel_map_pages(page, 1<<order, 0);
+ kernel_map_pages(page, 1 << order, 0);
local_irq_save(flags);
- free_pages_bulk(page_zone(page), 1, &list, order);
+ __mod_page_state(pgfree, 1 << order);
+ free_one_page(page_zone(page), page, order);
local_irq_restore(flags);
}
if (zone->zone_pgdat->node_id == numa_node_id())
continue;
- pset = zone->pageset[smp_processor_id()];
+ pset = zone_pcp(zone, smp_processor_id());
for (i = 0; i < ARRAY_SIZE(pset->pcp); i++) {
struct per_cpu_pages *pcp;
pcp = &pset->pcp[i];
- if (pcp->count)
- pcp->count -= free_pages_bulk(zone, pcp->count,
- &pcp->list, 0);
+ free_pages_bulk(zone, pcp->count, &pcp->list, 0);
+ pcp->count = 0;
}
}
local_irq_restore(flags);
pcp = &pset->pcp[i];
local_irq_save(flags);
- pcp->count -= free_pages_bulk(zone, pcp->count,
- &pcp->list, 0);
+ free_pages_bulk(zone, pcp->count, &pcp->list, 0);
+ pcp->count = 0;
local_irq_restore(flags);
}
}
}
#endif /* CONFIG_PM */
-static void zone_statistics(struct zonelist *zonelist, struct zone *z)
+static void zone_statistics(struct zonelist *zonelist, struct zone *z, int cpu)
{
#ifdef CONFIG_NUMA
- unsigned long flags;
- int cpu;
pg_data_t *pg = z->zone_pgdat;
pg_data_t *orig = zonelist->zones[0]->zone_pgdat;
struct per_cpu_pageset *p;
- local_irq_save(flags);
- cpu = smp_processor_id();
- p = zone_pcp(z,cpu);
+ p = zone_pcp(z, cpu);
if (pg == orig) {
p->numa_hit++;
} else {
p->local_node++;
else
p->other_node++;
- local_irq_restore(flags);
#endif
}
if (free_pages_check(page))
return;
- inc_page_state(pgfree);
kernel_map_pages(page, 1, 0);
pcp = &zone_pcp(zone, get_cpu())->pcp[cold];
local_irq_save(flags);
+ __inc_page_state(pgfree);
list_add(&page->lru, &pcp->list);
pcp->count++;
- if (pcp->count >= pcp->high)
- pcp->count -= free_pages_bulk(zone, pcp->batch, &pcp->list, 0);
+ if (pcp->count >= pcp->high) {
+ free_pages_bulk(zone, pcp->batch, &pcp->list, 0);
+ pcp->count -= pcp->batch;
+ }
local_irq_restore(flags);
put_cpu();
}
* we cheat by calling it from here, in the order > 0 path. Saves a branch
* or two.
*/
-static struct page *
-buffered_rmqueue(struct zone *zone, int order, gfp_t gfp_flags)
+static struct page *buffered_rmqueue(struct zonelist *zonelist,
+ struct zone *zone, int order, gfp_t gfp_flags)
{
unsigned long flags;
struct page *page;
int cold = !!(gfp_flags & __GFP_COLD);
+ int cpu;
again:
- if (order == 0) {
+ cpu = get_cpu();
+ if (likely(order == 0)) {
struct per_cpu_pages *pcp;
- page = NULL;
- pcp = &zone_pcp(zone, get_cpu())->pcp[cold];
+ pcp = &zone_pcp(zone, cpu)->pcp[cold];
local_irq_save(flags);
- if (!pcp->count)
+ if (!pcp->count) {
pcp->count += rmqueue_bulk(zone, 0,
pcp->batch, &pcp->list);
- if (likely(pcp->count)) {
- page = list_entry(pcp->list.next, struct page, lru);
- list_del(&page->lru);
- pcp->count--;
+ if (unlikely(!pcp->count))
+ goto failed;
}
- local_irq_restore(flags);
- put_cpu();
+ page = list_entry(pcp->list.next, struct page, lru);
+ list_del(&page->lru);
+ pcp->count--;
} else {
spin_lock_irqsave(&zone->lock, flags);
page = __rmqueue(zone, order);
- spin_unlock_irqrestore(&zone->lock, flags);
+ spin_unlock(&zone->lock);
+ if (!page)
+ goto failed;
}
- if (page != NULL) {
- BUG_ON(bad_range(zone, page));
- mod_page_state_zone(zone, pgalloc, 1 << order);
- if (prep_new_page(page, order))
- goto again;
+ __mod_page_state_zone(zone, pgalloc, 1 << order);
+ zone_statistics(zonelist, zone, cpu);
+ local_irq_restore(flags);
+ put_cpu();
+
+ BUG_ON(bad_range(zone, page));
+ if (prep_new_page(page, order))
+ goto again;
- if (gfp_flags & __GFP_ZERO)
- prep_zero_page(page, order, gfp_flags);
+ if (gfp_flags & __GFP_ZERO)
+ prep_zero_page(page, order, gfp_flags);
- if (order && (gfp_flags & __GFP_COMP))
- prep_compound_page(page, order);
- }
+ if (order && (gfp_flags & __GFP_COMP))
+ prep_compound_page(page, order);
return page;
+
+failed:
+ local_irq_restore(flags);
+ put_cpu();
+ return NULL;
}
#define ALLOC_NO_WATERMARKS 0x01 /* don't check watermarks at all */
continue;
}
- page = buffered_rmqueue(*z, order, gfp_mask);
+ page = buffered_rmqueue(zonelist, *z, order, gfp_mask);
if (page) {
- zone_statistics(zonelist, *z);
break;
}
} while (*(++z) != NULL);
cond_resched();
/* We now go into synchronous reclaim */
+ cpuset_memory_pressure_bump();
p->flags |= PF_MEMALLOC;
reclaim_state.reclaimed_slab = 0;
p->reclaim_state = &reclaim_state;
int cpu = 0;
memset(ret, 0, sizeof(*ret));
+ cpus_and(*cpumask, *cpumask, cpu_online_map);
cpu = first_cpu(*cpumask);
while (cpu < NR_CPUS) {
__get_page_state(ret, sizeof(*ret) / sizeof(unsigned long), &mask);
}
-unsigned long __read_page_state(unsigned long offset)
+unsigned long read_page_state_offset(unsigned long offset)
{
unsigned long ret = 0;
int cpu;
- for_each_cpu(cpu) {
+ for_each_online_cpu(cpu) {
unsigned long in;
in = (unsigned long)&per_cpu(page_states, cpu) + offset;
return ret;
}
-void __mod_page_state(unsigned long offset, unsigned long delta)
+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;
+ void *ptr;
local_irq_save(flags);
ptr = &__get_cpu_var(page_states);
- *(unsigned long*)(ptr + offset) += delta;
+ *(unsigned long *)(ptr + offset) += delta;
local_irq_restore(flags);
}
-
-EXPORT_SYMBOL(__mod_page_state);
+EXPORT_SYMBOL(mod_page_state_offset);
void __get_zone_counts(unsigned long *active, unsigned long *inactive,
unsigned long *free, struct pglist_data *pgdat)
INIT_LIST_HEAD(&pcp->list);
}
+/*
+ * setup_pagelist_highmark() sets the high water mark for hot per_cpu_pagelist
+ * to the value high for the pageset p.
+ */
+
+static void setup_pagelist_highmark(struct per_cpu_pageset *p,
+ unsigned long high)
+{
+ struct per_cpu_pages *pcp;
+
+ pcp = &p->pcp[0]; /* hot list */
+ pcp->high = high;
+ pcp->batch = max(1UL, high/4);
+ if ((high/4) > (PAGE_SHIFT * 8))
+ pcp->batch = PAGE_SHIFT * 8;
+}
+
+
#ifdef CONFIG_NUMA
/*
* Boot pageset table. One per cpu which is going to be used for all
for_each_zone(zone) {
- zone->pageset[cpu] = kmalloc_node(sizeof(struct per_cpu_pageset),
+ zone_pcp(zone, cpu) = kmalloc_node(sizeof(struct per_cpu_pageset),
GFP_KERNEL, cpu_to_node(cpu));
- if (!zone->pageset[cpu])
+ if (!zone_pcp(zone, cpu))
goto bad;
- setup_pageset(zone->pageset[cpu], zone_batchsize(zone));
+ setup_pageset(zone_pcp(zone, cpu), zone_batchsize(zone));
+
+ if (percpu_pagelist_fraction)
+ setup_pagelist_highmark(zone_pcp(zone, cpu),
+ (zone->present_pages / percpu_pagelist_fraction));
}
return 0;
for_each_zone(dzone) {
if (dzone == zone)
break;
- kfree(dzone->pageset[cpu]);
- dzone->pageset[cpu] = NULL;
+ kfree(zone_pcp(dzone, cpu));
+ zone_pcp(dzone, cpu) = NULL;
}
return -ENOMEM;
}
static inline void free_zone_pagesets(int cpu)
{
-#ifdef CONFIG_NUMA
struct zone *zone;
for_each_zone(zone) {
zone_pcp(zone, cpu) = NULL;
kfree(pset);
}
-#endif
}
static int __devinit pageset_cpuup_callback(struct notifier_block *nfb,
for (cpu = 0; cpu < NR_CPUS; cpu++) {
#ifdef CONFIG_NUMA
/* Early boot. Slab allocator not functional yet */
- zone->pageset[cpu] = &boot_pageset[cpu];
+ zone_pcp(zone, cpu) = &boot_pageset[cpu];
setup_pageset(&boot_pageset[cpu],0);
#else
setup_pageset(zone_pcp(zone,cpu), batch);
seq_printf(m,
")"
"\n pagesets");
- for (i = 0; i < ARRAY_SIZE(zone->pageset); i++) {
+ for_each_online_cpu(i) {
struct per_cpu_pageset *pageset;
int j;
return 0;
}
+/*
+ * percpu_pagelist_fraction - changes the pcp->high for each zone on each
+ * cpu. It is the fraction of total pages in each zone that a hot per cpu pagelist
+ * can have before it gets flushed back to buddy allocator.
+ */
+
+int percpu_pagelist_fraction_sysctl_handler(ctl_table *table, int write,
+ struct file *file, void __user *buffer, size_t *length, loff_t *ppos)
+{
+ struct zone *zone;
+ unsigned int cpu;
+ int ret;
+
+ ret = proc_dointvec_minmax(table, write, file, buffer, length, ppos);
+ if (!write || (ret == -EINVAL))
+ return ret;
+ for_each_zone(zone) {
+ for_each_online_cpu(cpu) {
+ unsigned long high;
+ high = zone->present_pages / percpu_pagelist_fraction;
+ setup_pagelist_highmark(zone_pcp(zone, cpu), high);
+ }
+ }
+ return 0;
+}
+
__initdata int hashdist = HASHDIST_DEFAULT;
#ifdef CONFIG_NUMA
projects / linux-2.6-omap-h63xx.git / blobdiff