diff options
Diffstat (limited to 'mm/vmscan.c')
| -rw-r--r-- | mm/vmscan.c | 38 |
1 files changed, 34 insertions, 4 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c index d10d2f9a33f..c82ee9a33cf 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1090,6 +1090,7 @@ static void shrink_active_list(unsigned long nr_pages, struct zone *zone, __mod_zone_page_state(zone, NR_ACTIVE_ANON, -pgmoved); spin_unlock_irq(&zone->lru_lock); + pgmoved = 0; while (!list_empty(&l_hold)) { cond_resched(); page = lru_to_page(&l_hold); @@ -1098,6 +1099,13 @@ static void shrink_active_list(unsigned long nr_pages, struct zone *zone, } /* + * Count the referenced pages as rotated, even when they are moved + * to the inactive list. This helps balance scan pressure between + * file and anonymous pages in get_scan_ratio. + */ + zone->recent_rotated[!!file] += pgmoved; + + /* * Now put the pages back on the appropriate [file or anon] inactive * and active lists. */ @@ -1158,7 +1166,6 @@ static void shrink_active_list(unsigned long nr_pages, struct zone *zone, } } __mod_zone_page_state(zone, NR_LRU_BASE + lru, pgmoved); - zone->recent_rotated[!!file] += pgmoved; __count_zone_vm_events(PGREFILL, zone, pgscanned); __count_vm_events(PGDEACTIVATE, pgdeactivate); @@ -1174,7 +1181,13 @@ static unsigned long shrink_list(enum lru_list lru, unsigned long nr_to_scan, { int file = is_file_lru(lru); - if (lru == LRU_ACTIVE_ANON || lru == LRU_ACTIVE_FILE) { + if (lru == LRU_ACTIVE_FILE) { + shrink_active_list(nr_to_scan, zone, sc, priority, file); + return 0; + } + + if (lru == LRU_ACTIVE_ANON && + (!scan_global_lru(sc) || inactive_anon_is_low(zone))) { shrink_active_list(nr_to_scan, zone, sc, priority, file); return 0; } @@ -1310,8 +1323,8 @@ static unsigned long shrink_zone(int priority, struct zone *zone, } } - while (nr[LRU_ACTIVE_ANON] || nr[LRU_INACTIVE_ANON] || - nr[LRU_ACTIVE_FILE] || nr[LRU_INACTIVE_FILE]) { + while (nr[LRU_INACTIVE_ANON] || nr[LRU_ACTIVE_FILE] || + nr[LRU_INACTIVE_FILE]) { for_each_lru(l) { if (nr[l]) { nr_to_scan = min(nr[l], @@ -1324,6 +1337,15 @@ static unsigned long shrink_zone(int priority, struct zone *zone, } } + /* + * Even if we did not try to evict anon pages at all, we want to + * rebalance the anon lru active/inactive ratio. + */ + if (!scan_global_lru(sc) || inactive_anon_is_low(zone)) + shrink_active_list(SWAP_CLUSTER_MAX, zone, sc, priority, 0); + else if (!scan_global_lru(sc)) + shrink_active_list(SWAP_CLUSTER_MAX, zone, sc, priority, 0); + throttle_vm_writeout(sc->gfp_mask); return nr_reclaimed; } @@ -1617,6 +1639,14 @@ loop_again: priority != DEF_PRIORITY) continue; + /* + * Do some background aging of the anon list, to give + * pages a chance to be referenced before reclaiming. + */ + if (inactive_anon_is_low(zone)) + shrink_active_list(SWAP_CLUSTER_MAX, zone, + &sc, priority, 0); + if (!zone_watermark_ok(zone, order, zone->pages_high, 0, 0)) { end_zone = i; |