ACPI: DMI init_set_sci_en_on_resume for multiple Lenovo ThinkPads

[karo-tx-linux.git] / mm / vmscan.c

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 64e438898832371277e8baeb89fd5ebb1f72a14a..692807f2228b25125e25963ab35e99777facdf8e 100644 (file)
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -544,6 +544,16 @@ redo:
                 */
                lru = LRU_UNEVICTABLE;
                add_page_to_unevictable_list(page);
+               /*
+                * When racing with an mlock clearing (page is
+                * unlocked), make sure that if the other thread does
+                * not observe our setting of PG_lru and fails
+                * isolation, we see PG_mlocked cleared below and move
+                * the page back to the evictable list.
+                *
+                * The other side is TestClearPageMlocked().
+                */
+               smp_mb();
        }
 
        /*
@@ -1088,7 +1098,7 @@ static unsigned long shrink_inactive_list(unsigned long max_scan,
        int lumpy_reclaim = 0;
 
        while (unlikely(too_many_isolated(zone, file, sc))) {
-               congestion_wait(WRITE, HZ/10);
+               congestion_wait(BLK_RW_ASYNC, HZ/10);
 
                /* We are about to die and free our memory. Return now. */
                if (fatal_signal_pending(current))
@@ -1356,7 +1366,7 @@ static void shrink_active_list(unsigned long nr_pages, struct zone *zone,
                         * IO, plus JVM can create lots of anon VM_EXEC pages,
                         * so we ignore them here.
                         */
-                       if ((vm_flags & VM_EXEC) && !PageAnon(page)) {
+                       if ((vm_flags & VM_EXEC) && page_is_file_cache(page)) {
                                list_add(&page->lru, &l_active);
                                continue;
                        }
@@ -1454,20 +1464,26 @@ static int inactive_file_is_low(struct zone *zone, struct scan_control *sc)
        return low;
 }
 
+static int inactive_list_is_low(struct zone *zone, struct scan_control *sc,
+                               int file)
+{
+       if (file)
+               return inactive_file_is_low(zone, sc);
+       else
+               return inactive_anon_is_low(zone, sc);
+}
+
 static unsigned long shrink_list(enum lru_list lru, unsigned long nr_to_scan,
        struct zone *zone, struct scan_control *sc, int priority)
 {
        int file = is_file_lru(lru);
 
-       if (lru == LRU_ACTIVE_FILE && inactive_file_is_low(zone, sc)) {
-               shrink_active_list(nr_to_scan, zone, sc, priority, file);
+       if (is_active_lru(lru)) {
+               if (inactive_list_is_low(zone, sc, file))
+                   shrink_active_list(nr_to_scan, zone, sc, priority, file);
                return 0;
        }
 
-       if (lru == LRU_ACTIVE_ANON && inactive_anon_is_low(zone, sc)) {
-               shrink_active_list(nr_to_scan, zone, sc, priority, file);
-               return 0;
-       }
        return shrink_inactive_list(nr_to_scan, zone, sc, priority, file);
 }