unsigned long *nr_anon,
unsigned long *nr_file)
{
- struct zone_reclaim_stat *reclaim_stat = get_reclaim_stat(mz);
struct zone *zone = mz->zone;
unsigned int count[NR_LRU_LISTS] = { 0, };
unsigned long nr_active = 0;
count[lru] += numpages;
}
+ preempt_disable();
__count_vm_events(PGDEACTIVATE, nr_active);
__mod_zone_page_state(zone, NR_ACTIVE_FILE,
*nr_anon = count[LRU_ACTIVE_ANON] + count[LRU_INACTIVE_ANON];
*nr_file = count[LRU_ACTIVE_FILE] + count[LRU_INACTIVE_FILE];
- reclaim_stat->recent_scanned[0] += *nr_anon;
- reclaim_stat->recent_scanned[1] += *nr_file;
+ __mod_zone_page_state(zone, NR_ISOLATED_ANON, *nr_anon);
+ __mod_zone_page_state(zone, NR_ISOLATED_FILE, *nr_file);
+ preempt_enable();
}
/*
unsigned long nr_writeback = 0;
isolate_mode_t isolate_mode = ISOLATE_INACTIVE;
struct zone *zone = mz->zone;
+ struct zone_reclaim_stat *reclaim_stat = get_reclaim_stat(mz);
while (unlikely(too_many_isolated(zone, file, sc))) {
congestion_wait(BLK_RW_ASYNC, HZ/10);
__count_zone_vm_events(PGSCAN_DIRECT, zone,
nr_scanned);
}
+ spin_unlock_irq(&zone->lru_lock);
- if (nr_taken == 0) {
- spin_unlock_irq(&zone->lru_lock);
+ if (nr_taken == 0)
return 0;
- }
update_isolated_counts(mz, &page_list, &nr_anon, &nr_file);
- __mod_zone_page_state(zone, NR_ISOLATED_ANON, nr_anon);
- __mod_zone_page_state(zone, NR_ISOLATED_FILE, nr_file);
-
- spin_unlock_irq(&zone->lru_lock);
-
nr_reclaimed = shrink_page_list(&page_list, mz, sc, priority,
&nr_dirty, &nr_writeback);
spin_lock_irq(&zone->lru_lock);
+ reclaim_stat->recent_scanned[0] += nr_anon;
+ reclaim_stat->recent_scanned[1] += nr_file;
+
if (current_is_kswapd())
__count_vm_events(KSWAPD_STEAL, nr_reclaimed);
__count_zone_vm_events(PGSTEAL, zone, nr_reclaimed);
unsigned long pgmoved = 0;
struct page *page;
- if (buffer_heads_over_limit) {
- spin_unlock_irq(&zone->lru_lock);
- list_for_each_entry(page, list, lru) {
- if (page_has_private(page) && trylock_page(page)) {
- if (page_has_private(page))
- try_to_release_page(page, 0);
- unlock_page(page);
- }
- }
- spin_lock_irq(&zone->lru_lock);
- }
-
while (!list_empty(list)) {
struct lruvec *lruvec;
lru_add_drain();
+ reset_reclaim_mode(sc);
+
if (!sc->may_unmap)
isolate_mode |= ISOLATE_UNMAPPED;
if (!sc->may_writepage)
continue;
}
+ if (unlikely(buffer_heads_over_limit)) {
+ if (page_has_private(page) && trylock_page(page)) {
+ if (page_has_private(page))
+ try_to_release_page(page, 0);
+ unlock_page(page);
+ }
+ }
+
if (page_referenced(page, 0, mz->mem_cgroup, &vm_flags)) {
nr_rotated += hpage_nr_pages(page);
/*
unsigned long nr_soft_scanned;
bool aborted_reclaim = false;
+ /*
+ * If the number of buffer_heads in the machine exceeds the maximum
+ * allowed level, force direct reclaim to scan the highmem zone as
+ * highmem pages could be pinning lowmem pages storing buffer_heads
+ */
+ if (buffer_heads_over_limit)
+ sc->gfp_mask |= __GFP_HIGHMEM;
+
for_each_zone_zonelist_nodemask(zone, z, zonelist,
gfp_zone(sc->gfp_mask), sc->nodemask) {
if (!populated_zone(zone))
* Even though compaction is invoked for any
* non-zero order, only frequent costly order
* reclamation is disruptive enough to become a
- * noticable problem, like transparent huge page
- * allocations.
+ * noticeable problem, like transparent huge
+ * page allocations.
*/
if (compaction_ready(zone, sc)) {
aborted_reclaim = true;
unsigned long writeback_threshold;
bool aborted_reclaim;
- get_mems_allowed();
delayacct_freepages_start();
if (global_reclaim(sc))
out:
delayacct_freepages_end();
- put_mems_allowed();
if (sc->nr_reclaimed)
return sc->nr_reclaimed;
*/
age_active_anon(zone, &sc, priority);
+ /*
+ * If the number of buffer_heads in the machine
+ * exceeds the maximum allowed level and this node
+ * has a highmem zone, force kswapd to reclaim from
+ * it to relieve lowmem pressure.
+ */
+ if (buffer_heads_over_limit && is_highmem_idx(i)) {
+ end_zone = i;
+ break;
+ }
+
if (!zone_watermark_ok_safe(zone, order,
high_wmark_pages(zone), 0, 0)) {
end_zone = i;
COMPACT_SKIPPED)
testorder = 0;
- if (!zone_watermark_ok_safe(zone, testorder,
+ if ((buffer_heads_over_limit && is_highmem_idx(i)) ||
+ !zone_watermark_ok_safe(zone, order,
high_wmark_pages(zone) + balance_gap,
end_zone, 0)) {
shrink_zone(priority, zone, &sc);