{
unsigned long nr;
- nr = zone_page_state_snapshot(zone, NR_ZONE_LRU_FILE);
+ nr = zone_page_state_snapshot(zone, NR_ZONE_INACTIVE_FILE) +
+ zone_page_state_snapshot(zone, NR_ZONE_ACTIVE_FILE);
if (get_nr_swap_pages() > 0)
- nr += zone_page_state_snapshot(zone, NR_ZONE_LRU_ANON);
+ nr += zone_page_state_snapshot(zone, NR_ZONE_INACTIVE_ANON) +
+ zone_page_state_snapshot(zone, NR_ZONE_ACTIVE_ANON);
return nr;
}
return ret;
}
+
+/*
+ * Update LRU sizes after isolating pages. The LRU size updates must
+ * be complete before mem_cgroup_update_lru_size due to a santity check.
+ */
+static __always_inline void update_lru_sizes(struct lruvec *lruvec,
+ enum lru_list lru, unsigned long *nr_zone_taken,
+ unsigned long nr_taken)
+{
+ int zid;
+
+ for (zid = 0; zid < MAX_NR_ZONES; zid++) {
+ if (!nr_zone_taken[zid])
+ continue;
+
+ __update_lru_size(lruvec, lru, zid, -nr_zone_taken[zid]);
+ }
+
+#ifdef CONFIG_MEMCG
+ mem_cgroup_update_lru_size(lruvec, lru, -nr_taken);
+#endif
+}
+
/*
* zone_lru_lock is heavily contended. Some of the functions that
* shrink the lists perform better by taking out a batch of pages
struct list_head *src = &lruvec->lists[lru];
unsigned long nr_taken = 0;
unsigned long nr_zone_taken[MAX_NR_ZONES] = { 0 };
+ unsigned long nr_skipped[MAX_NR_ZONES] = { 0, };
unsigned long scan, nr_pages;
LIST_HEAD(pages_skipped);
for (scan = 0; scan < nr_to_scan && nr_taken < nr_to_scan &&
- !list_empty(src); scan++) {
+ !list_empty(src);) {
struct page *page;
page = lru_to_page(src);
if (page_zonenum(page) > sc->reclaim_idx) {
list_move(&page->lru, &pages_skipped);
+ nr_skipped[page_zonenum(page)]++;
continue;
}
+ /*
+ * Account for scanned and skipped separetly to avoid the pgdat
+ * being prematurely marked unreclaimable by pgdat_reclaimable.
+ */
+ scan++;
+
switch (__isolate_lru_page(page, mode)) {
case 0:
nr_pages = hpage_nr_pages(page);
* scanning would soon rescan the same pages to skip and put the
* system at risk of premature OOM.
*/
- if (!list_empty(&pages_skipped))
+ if (!list_empty(&pages_skipped)) {
+ int zid;
+ unsigned long total_skipped = 0;
+
+ for (zid = 0; zid < MAX_NR_ZONES; zid++) {
+ if (!nr_skipped[zid])
+ continue;
+
+ __count_zid_vm_events(PGSCAN_SKIP, zid, nr_skipped[zid]);
+ total_skipped += nr_skipped[zid];
+ }
+
+ /*
+ * Account skipped pages as a partial scan as the pgdat may be
+ * close to unreclaimable. If the LRU list is empty, account
+ * skipped pages as a full scan.
+ */
+ scan += list_empty(src) ? total_skipped : total_skipped >> 2;
+
list_splice(&pages_skipped, src);
+ }
*nr_scanned = scan;
- trace_mm_vmscan_lru_isolate(sc->order, nr_to_scan, scan,
+ trace_mm_vmscan_lru_isolate(sc->reclaim_idx, sc->order, nr_to_scan, scan,
nr_taken, mode, is_file_lru(lru));
- for (scan = 0; scan < MAX_NR_ZONES; scan++) {
- nr_pages = nr_zone_taken[scan];
- if (!nr_pages)
- continue;
-
- update_lru_size(lruvec, lru, scan, -nr_pages);
- }
+ update_lru_sizes(lruvec, lru, nr_zone_taken, nr_taken);
return nr_taken;
}
bdi_write_congested(current->backing_dev_info);
}
+static bool inactive_reclaimable_pages(struct lruvec *lruvec,
+ struct scan_control *sc, enum lru_list lru)
+{
+ int zid;
+ struct zone *zone;
+ int file = is_file_lru(lru);
+ struct pglist_data *pgdat = lruvec_pgdat(lruvec);
+
+ if (!global_reclaim(sc))
+ return true;
+
+ for (zid = sc->reclaim_idx; zid >= 0; zid--) {
+ zone = &pgdat->node_zones[zid];
+ if (!populated_zone(zone))
+ continue;
+
+ if (zone_page_state_snapshot(zone, NR_ZONE_LRU_BASE +
+ LRU_FILE * file) >= SWAP_CLUSTER_MAX)
+ return true;
+ }
+
+ return false;
+}
+
/*
* shrink_inactive_list() is a helper for shrink_node(). It returns the number
* of reclaimed pages
struct pglist_data *pgdat = lruvec_pgdat(lruvec);
struct zone_reclaim_stat *reclaim_stat = &lruvec->reclaim_stat;
+ if (!inactive_reclaimable_pages(lruvec, sc, lru))
+ return 0;
+
while (unlikely(too_many_isolated(pgdat, file, sc))) {
congestion_wait(BLK_RW_ASYNC, HZ/10);
* 1TB 101 10GB
* 10TB 320 32GB
*/
-static bool inactive_list_is_low(struct lruvec *lruvec, bool file)
+static bool inactive_list_is_low(struct lruvec *lruvec, bool file,
+ struct scan_control *sc)
{
unsigned long inactive_ratio;
unsigned long inactive;
unsigned long active;
unsigned long gb;
+ struct pglist_data *pgdat = lruvec_pgdat(lruvec);
+ int zid;
/*
* If we don't have swap space, anonymous page deactivation
inactive = lruvec_lru_size(lruvec, file * LRU_FILE);
active = lruvec_lru_size(lruvec, file * LRU_FILE + LRU_ACTIVE);
+ /*
+ * For zone-constrained allocations, it is necessary to check if
+ * deactivations are required for lowmem to be reclaimed. This
+ * calculates the inactive/active pages available in eligible zones.
+ */
+ for (zid = sc->reclaim_idx + 1; zid < MAX_NR_ZONES; zid++) {
+ struct zone *zone = &pgdat->node_zones[zid];
+ unsigned long inactive_zone, active_zone;
+
+ if (!populated_zone(zone))
+ continue;
+
+ inactive_zone = zone_page_state(zone,
+ NR_ZONE_LRU_BASE + (file * LRU_FILE));
+ active_zone = zone_page_state(zone,
+ NR_ZONE_LRU_BASE + (file * LRU_FILE) + LRU_ACTIVE);
+
+ inactive -= min(inactive, inactive_zone);
+ active -= min(active, active_zone);
+ }
+
gb = (inactive + active) >> (30 - PAGE_SHIFT);
if (gb)
inactive_ratio = int_sqrt(10 * gb);
struct lruvec *lruvec, struct scan_control *sc)
{
if (is_active_lru(lru)) {
- if (inactive_list_is_low(lruvec, is_file_lru(lru)))
+ if (inactive_list_is_low(lruvec, is_file_lru(lru), sc))
shrink_active_list(nr_to_scan, lruvec, sc, lru);
return 0;
}
* lruvec even if it has plenty of old anonymous pages unless the
* system is under heavy pressure.
*/
- if (!inactive_list_is_low(lruvec, true) &&
+ if (!inactive_list_is_low(lruvec, true, sc) &&
lruvec_lru_size(lruvec, LRU_INACTIVE_FILE) >> sc->priority) {
scan_balance = SCAN_FILE;
goto out;
* Even if we did not try to evict anon pages at all, we want to
* rebalance the anon lru active/inactive ratio.
*/
- if (inactive_list_is_low(lruvec, false))
+ if (inactive_list_is_low(lruvec, false, sc))
shrink_active_list(SWAP_CLUSTER_MAX, lruvec,
sc, LRU_ACTIVE_ANON);
for_each_zone_zonelist_nodemask(zone, z, zonelist,
sc->reclaim_idx, sc->nodemask) {
- if (!populated_zone(zone))
- continue;
-
/*
* Take care memory controller reclaiming has small influence
* to global LRU.
delayacct_freepages_start();
if (global_reclaim(sc))
- count_vm_event(ALLOCSTALL);
+ __count_zid_vm_events(ALLOCSTALL, sc->reclaim_idx, 1);
do {
vmpressure_prio(sc->gfp_mask, sc->target_mem_cgroup,
trace_mm_vmscan_direct_reclaim_begin(order,
sc.may_writepage,
- gfp_mask);
+ gfp_mask,
+ sc.reclaim_idx);
nr_reclaimed = do_try_to_free_pages(zonelist, &sc);
trace_mm_vmscan_memcg_softlimit_reclaim_begin(sc.order,
sc.may_writepage,
- sc.gfp_mask);
+ sc.gfp_mask,
+ sc.reclaim_idx);
/*
* NOTE: Although we can get the priority field, using it
trace_mm_vmscan_memcg_reclaim_begin(0,
sc.may_writepage,
- sc.gfp_mask);
+ sc.gfp_mask,
+ sc.reclaim_idx);
nr_reclaimed = do_try_to_free_pages(zonelist, &sc);
do {
struct lruvec *lruvec = mem_cgroup_lruvec(pgdat, memcg);
- if (inactive_list_is_low(lruvec, false))
+ if (inactive_list_is_low(lruvec, false, sc))
shrink_active_list(SWAP_CLUSTER_MAX, lruvec,
sc, LRU_ACTIVE_ANON);
* but kcompactd is woken to compact for the original
* request (alloc_order).
*/
- trace_mm_vmscan_kswapd_wake(pgdat->node_id, alloc_order);
+ trace_mm_vmscan_kswapd_wake(pgdat->node_id, classzone_idx,
+ alloc_order);
reclaim_order = balance_pgdat(pgdat, alloc_order, classzone_idx);
if (reclaim_order < alloc_order)
goto kswapd_try_sleep;
void check_move_unevictable_pages(struct page **pages, int nr_pages)
{
struct lruvec *lruvec;
- struct zone *zone = NULL;
+ struct pglist_data *pgdat = NULL;
int pgscanned = 0;
int pgrescued = 0;
int i;
for (i = 0; i < nr_pages; i++) {
struct page *page = pages[i];
- struct zone *pagezone;
+ struct pglist_data *pagepgdat = page_pgdat(page);
pgscanned++;
- pagezone = page_zone(page);
- if (pagezone != zone) {
- if (zone)
- spin_unlock_irq(zone_lru_lock(zone));
- zone = pagezone;
- spin_lock_irq(zone_lru_lock(zone));
+ if (pagepgdat != pgdat) {
+ if (pgdat)
+ spin_unlock_irq(&pgdat->lru_lock);
+ pgdat = pagepgdat;
+ spin_lock_irq(&pgdat->lru_lock);
}
- lruvec = mem_cgroup_page_lruvec(page, zone->zone_pgdat);
+ lruvec = mem_cgroup_page_lruvec(page, pgdat);
if (!PageLRU(page) || !PageUnevictable(page))
continue;
}
}
- if (zone) {
+ if (pgdat) {
__count_vm_events(UNEVICTABLE_PGRESCUED, pgrescued);
__count_vm_events(UNEVICTABLE_PGSCANNED, pgscanned);
- spin_unlock_irq(zone_lru_lock(zone));
+ spin_unlock_irq(&pgdat->lru_lock);
}
}
#endif /* CONFIG_SHMEM */
projects / linux-2.6-microblaze.git / blobdiff