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-rw-r--r--mm/page_alloc.c2
-rw-r--r--mm/vmscan.c9
2 files changed, 6 insertions, 5 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 620aa11b24eb..d157dae8c9f3 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1909,7 +1909,7 @@ static void __init free_area_init_core(struct pglist_data *pgdat,
zone->nr_scan_inactive = 0;
zone->nr_active = 0;
zone->nr_inactive = 0;
- atomic_set(&zone->reclaim_in_progress, -1);
+ atomic_set(&zone->reclaim_in_progress, 0);
if (!size)
continue;
diff --git a/mm/vmscan.c b/mm/vmscan.c
index ab631a3c62c3..0095533cdde9 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -822,6 +822,8 @@ shrink_zone(struct zone *zone, struct scan_control *sc)
unsigned long nr_active;
unsigned long nr_inactive;
+ atomic_inc(&zone->reclaim_in_progress);
+
/*
* Add one to `nr_to_scan' just to make sure that the kernel will
* slowly sift through the active list.
@@ -861,6 +863,8 @@ shrink_zone(struct zone *zone, struct scan_control *sc)
}
throttle_vm_writeout();
+
+ atomic_dec(&zone->reclaim_in_progress);
}
/*
@@ -900,9 +904,7 @@ shrink_caches(struct zone **zones, struct scan_control *sc)
if (zone->all_unreclaimable && sc->priority != DEF_PRIORITY)
continue; /* Let kswapd poll it */
- atomic_inc(&zone->reclaim_in_progress);
shrink_zone(zone, sc);
- atomic_dec(&zone->reclaim_in_progress);
}
}
@@ -1358,14 +1360,13 @@ int zone_reclaim(struct zone *zone, unsigned int gfp_mask, unsigned int order)
sc.swap_cluster_max = SWAP_CLUSTER_MAX;
/* Don't reclaim the zone if there are other reclaimers active */
- if (!atomic_inc_and_test(&zone->reclaim_in_progress))
+ if (atomic_read(&zone->reclaim_in_progress) > 0)
goto out;
shrink_zone(zone, &sc);
total_reclaimed = sc.nr_reclaimed;
out:
- atomic_dec(&zone->reclaim_in_progress);
return total_reclaimed;
}