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-rw-r--r--mm/vmstat.c20
1 files changed, 5 insertions, 15 deletions
diff --git a/mm/vmstat.c b/mm/vmstat.c
index dfdf2413390..3799a0f7543 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -190,8 +190,8 @@ static void __inc_zone_state(struct zone *zone, enum zone_stat_item item)
(*p)++;
if (unlikely(*p > STAT_THRESHOLD)) {
- zone_page_state_add(*p, zone, item);
- *p = 0;
+ zone_page_state_add(*p + STAT_THRESHOLD / 2, zone, item);
+ *p = -STAT_THRESHOLD / 2;
}
}
@@ -209,8 +209,8 @@ void __dec_zone_page_state(struct page *page, enum zone_stat_item item)
(*p)--;
if (unlikely(*p < -STAT_THRESHOLD)) {
- zone_page_state_add(*p, zone, item);
- *p = 0;
+ zone_page_state_add(*p - STAT_THRESHOLD / 2, zone, item);
+ *p = STAT_THRESHOLD /2;
}
}
EXPORT_SYMBOL(__dec_zone_page_state);
@@ -239,19 +239,9 @@ EXPORT_SYMBOL(inc_zone_page_state);
void dec_zone_page_state(struct page *page, enum zone_stat_item item)
{
unsigned long flags;
- struct zone *zone;
- s8 *p;
- zone = page_zone(page);
local_irq_save(flags);
- p = diff_pointer(zone, item);
-
- (*p)--;
-
- if (unlikely(*p < -STAT_THRESHOLD)) {
- zone_page_state_add(*p, zone, item);
- *p = 0;
- }
+ __dec_zone_page_state(page, item);
local_irq_restore(flags);
}
EXPORT_SYMBOL(dec_zone_page_state);