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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.

[[email protected]: build fix]
Signed-off-by: Christoph Lameter <[email protected]>
Signed-off-by: Michal Piotrowski <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Christoph Lameter 2007-02-10 01:43:02 -08:00 • committed by Linus Torvalds
commit d23ad42324
6 changed files with 25 additions and 46 deletions
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20
mm/vmstat.c
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@ -16,30 +16,17 @@
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 = node_page_state(pgdat->node_id, NR_ACTIVE);
*inactive = node_page_state(pgdat->node_id, NR_INACTIVE);
*free = 0;
for (i = 0; i < MAX_NR_ZONES; i++) {
*free += zones[i].free_pages;
}
*free = node_page_state(pgdat->node_id, NR_FREE_PAGES);
}
void get_zone_counts(unsigned long *active,
unsigned long *inactive, unsigned long *free)
{
struct pglist_data *pgdat;
*active = global_page_state(NR_ACTIVE);
*inactive = global_page_state(NR_INACTIVE);
*free = 0;
for_each_online_pgdat(pgdat) {
unsigned long l, m, n;
__get_zone_counts(&l, &m, &n, pgdat);
*free += n;
}
*free = global_page_state(NR_FREE_PAGES);
}
#ifdef CONFIG_VM_EVENT_COUNTERS
@ -454,6 +441,7 @@ const struct seq_operations fragmentation_op = {
static const char * const vmstat_text[] = {
/* Zoned VM counters */
"nr_free_pages",
"nr_active",
"nr_inactive",
"nr_anon_pages",
@ -534,7 +522,7 @@ static int zoneinfo_show(struct seq_file *m, void *arg)
"\n scanned %lu (a: %lu i: %lu)"
"\n spanned %lu"
"\n present %lu",
zone->free_pages,
zone_page_state(zone, NR_FREE_PAGES),
zone->pages_min,
zone->pages_low,
zone->pages_high,