zone = page_zone(page);
spin_lock_irqsave(&zone->lru_lock, flags);
if (PageLRU(page) && !PageActive(page)) {
- list_del(&page->lru);
- list_add_tail(&page->lru, &zone->inactive_list);
+ list_move_tail(&page->lru, &zone->inactive_list);
inc_page_state(pgrotated);
}
if (!test_clear_page_writeback(page))
*/
void fastcall __page_cache_release(struct page *page)
{
- unsigned long flags;
- struct zone *zone = page_zone(page);
+ if (PageLRU(page)) {
+ unsigned long flags;
+ struct zone *zone = page_zone(page);
- spin_lock_irqsave(&zone->lru_lock, flags);
- if (TestClearPageLRU(page))
+ spin_lock_irqsave(&zone->lru_lock, flags);
+ BUG_ON(!PageLRU(page));
+ __ClearPageLRU(page);
del_page_from_lru(zone, page);
- if (page_count(page) != 0)
- page = NULL;
- spin_unlock_irqrestore(&zone->lru_lock, flags);
- if (page)
- free_hot_page(page);
+ spin_unlock_irqrestore(&zone->lru_lock, flags);
+ }
+ free_hot_page(page);
}
-
EXPORT_SYMBOL(__page_cache_release);
/*
pagevec_init(&pages_to_free, cold);
for (i = 0; i < nr; i++) {
struct page *page = pages[i];
- struct zone *pagezone;
if (unlikely(PageCompound(page))) {
if (zone) {
if (!put_page_testzero(page))
continue;
- pagezone = page_zone(page);
- if (pagezone != zone) {
- if (zone)
- spin_unlock_irq(&zone->lru_lock);
- zone = pagezone;
- spin_lock_irq(&zone->lru_lock);
- }
- if (TestClearPageLRU(page))
+ if (PageLRU(page)) {
+ struct zone *pagezone = page_zone(page);
+ if (pagezone != zone) {
+ if (zone)
+ spin_unlock_irq(&zone->lru_lock);
+ zone = pagezone;
+ spin_lock_irq(&zone->lru_lock);
+ }
+ BUG_ON(!PageLRU(page));
+ __ClearPageLRU(page);
del_page_from_lru(zone, page);
- if (page_count(page) == 0) {
- if (!pagevec_add(&pages_to_free, page)) {
+ }
+
+ if (!pagevec_add(&pages_to_free, page)) {
+ if (zone) {
spin_unlock_irq(&zone->lru_lock);
- __pagevec_free(&pages_to_free);
- pagevec_reinit(&pages_to_free);
- zone = NULL; /* No lock is held */
+ zone = NULL;
}
- }
+ __pagevec_free(&pages_to_free);
+ pagevec_reinit(&pages_to_free);
+ }
}
if (zone)
spin_unlock_irq(&zone->lru_lock);
zone = pagezone;
spin_lock_irq(&zone->lru_lock);
}
- if (TestSetPageLRU(page))
- BUG();
+ BUG_ON(PageLRU(page));
+ SetPageLRU(page);
add_page_to_inactive_list(zone, page);
}
if (zone)
zone = pagezone;
spin_lock_irq(&zone->lru_lock);
}
- if (TestSetPageLRU(page))
- BUG();
- if (TestSetPageActive(page))
- BUG();
+ BUG_ON(PageLRU(page));
+ SetPageLRU(page);
+ BUG_ON(PageActive(page));
+ SetPageActive(page);
add_page_to_active_list(zone, page);
}
if (zone)
#endif /* CONFIG_HOTPLUG_CPU */
#endif /* CONFIG_SMP */
-#ifdef CONFIG_SMP
-void percpu_counter_mod(struct percpu_counter *fbc, long amount)
-{
- long count;
- long *pcount;
- int cpu = get_cpu();
-
- pcount = per_cpu_ptr(fbc->counters, cpu);
- count = *pcount + amount;
- if (count >= FBC_BATCH || count <= -FBC_BATCH) {
- spin_lock(&fbc->lock);
- fbc->count += count;
- *pcount = 0;
- spin_unlock(&fbc->lock);
- } else {
- *pcount = count;
- }
- put_cpu();
-}
-EXPORT_SYMBOL(percpu_counter_mod);
-
-/*
- * Add up all the per-cpu counts, return the result. This is a more accurate
- * but much slower version of percpu_counter_read_positive()
- */
-long percpu_counter_sum(struct percpu_counter *fbc)
-{
- long ret;
- int cpu;
-
- spin_lock(&fbc->lock);
- ret = fbc->count;
- for_each_cpu(cpu) {
- long *pcount = per_cpu_ptr(fbc->counters, cpu);
- ret += *pcount;
- }
- spin_unlock(&fbc->lock);
- return ret < 0 ? 0 : ret;
-}
-EXPORT_SYMBOL(percpu_counter_sum);
-#endif
-
/*
* Perform any setup for the swap system
*/