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[PATCH] Use ZVC for free_pages

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This is again simplifies some of the VM counter calculations through the use
of the ZVC consolidated counters.

[michal.k.k.piotrowski@gmail.com: build fix]
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Michal Piotrowski <michal.k.k.piotrowski@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christoph Lameter
2007-02-10 01:43:02 -08:00
committed by Linus Torvalds
parent c878538598
commit d23ad42324
6 changed files with 25 additions and 46 deletions
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37
mm/page_alloc.c
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@@ -395,7 +395,7 @@ static inline void __free_one_page(struct page *page,
VM_BUG_ON(page_idx & (order_size - 1));
VM_BUG_ON(bad_range(zone, page));
zone->free_pages += order_size;
__mod_zone_page_state(zone, NR_FREE_PAGES, order_size);
while (order < MAX_ORDER-1) {
unsigned long combined_idx;
struct free_area *area;
@@ -631,7 +631,7 @@ static struct page *__rmqueue(struct zone *zone, unsigned int order)
list_del(&page->lru);
rmv_page_order(page);
area->nr_free--;
zone->free_pages -= 1UL << order;
__mod_zone_page_state(zone, NR_FREE_PAGES, - (1UL << order));
expand(zone, page, order, current_order, area);
return page;
}
@@ -989,7 +989,8 @@ int zone_watermark_ok(struct zone *z, int order, unsigned long mark,
int classzone_idx, int alloc_flags)
{
/* free_pages my go negative - that's OK */
long min = mark, free_pages = z->free_pages - (1 << order) + 1;
long min = mark;
long free_pages = zone_page_state(z, NR_FREE_PAGES) - (1 << order) + 1;
int o;
if (alloc_flags & ALLOC_HIGH)
@@ -1444,13 +1445,7 @@ EXPORT_SYMBOL(free_pages);
*/
unsigned int nr_free_pages(void)
{
unsigned int sum = 0;
struct zone *zone;
for_each_zone(zone)
sum += zone->free_pages;
return sum;
return global_page_state(NR_FREE_PAGES);
}
EXPORT_SYMBOL(nr_free_pages);
@@ -1458,13 +1453,7 @@ EXPORT_SYMBOL(nr_free_pages);
#ifdef CONFIG_NUMA
unsigned int nr_free_pages_pgdat(pg_data_t *pgdat)
{
unsigned int sum = 0;
enum zone_type i;
for (i = 0; i < MAX_NR_ZONES; i++)
sum += pgdat->node_zones[i].free_pages;
return sum;
return node_page_state(pgdat->node_id, NR_FREE_PAGES);
}
#endif
@@ -1514,7 +1503,7 @@ void si_meminfo(struct sysinfo *val)
{
val->totalram = totalram_pages;
val->sharedram = 0;
val->freeram = nr_free_pages();
val->freeram = global_page_state(NR_FREE_PAGES);
val->bufferram = nr_blockdev_pages();
val->totalhigh = totalhigh_pages;
val->freehigh = nr_free_highpages();
@@ -1529,10 +1518,11 @@ void si_meminfo_node(struct sysinfo *val, int nid)
pg_data_t *pgdat = NODE_DATA(nid);
val->totalram = pgdat->node_present_pages;
val->freeram = nr_free_pages_pgdat(pgdat);
val->freeram = node_page_state(nid, NR_FREE_PAGES);
#ifdef CONFIG_HIGHMEM
val->totalhigh = pgdat->node_zones[ZONE_HIGHMEM].present_pages;
val->freehigh = pgdat->node_zones[ZONE_HIGHMEM].free_pages;
val->freehigh = zone_page_state(&pgdat->node_zones[ZONE_HIGHMEM],
NR_FREE_PAGES);
#else
val->totalhigh = 0;
val->freehigh = 0;
@@ -1580,13 +1570,13 @@ void show_free_areas(void)
get_zone_counts(&active, &inactive, &free);
printk("Active:%lu inactive:%lu dirty:%lu writeback:%lu unstable:%lu\n"
" free:%u slab:%lu mapped:%lu pagetables:%lu bounce:%lu\n",
" free:%lu slab:%lu mapped:%lu pagetables:%lu bounce:%lu\n",
active,
inactive,
global_page_state(NR_FILE_DIRTY),
global_page_state(NR_WRITEBACK),
global_page_state(NR_UNSTABLE_NFS),
nr_free_pages(),
global_page_state(NR_FREE_PAGES),
global_page_state(NR_SLAB_RECLAIMABLE) +
global_page_state(NR_SLAB_UNRECLAIMABLE),
global_page_state(NR_FILE_MAPPED),
@@ -1612,7 +1602,7 @@ void show_free_areas(void)
" all_unreclaimable? %s"
"\n",
zone->name,
K(zone->free_pages),
K(zone_page_state(zone, NR_FREE_PAGES)),
K(zone->pages_min),
K(zone->pages_low),
K(zone->pages_high),
@@ -2675,7 +2665,6 @@ static void __meminit free_area_init_core(struct pglist_data *pgdat,
spin_lock_init(&zone->lru_lock);
zone_seqlock_init(zone);
zone->zone_pgdat = pgdat;
zone->free_pages = 0;
zone->prev_priority = DEF_PRIORITY;