aboutsummaryrefslogtreecommitdiff
path: root/mm
diff options
context:
space:
mode:
authorMartin Hicks <mort@bork.org>2005-09-03 15:54:51 -0700
committerLinus Torvalds <torvalds@evo.osdl.org>2005-09-05 00:05:44 -0700
commit53e9a6159fdc6419874ce4d86d3577dbedc77b62 (patch)
tree7c7f15325569cf5e02dafc1974fb080154616058 /mm
parentbce5f6ba340b09d8b29902add204bb95a6d3d88b (diff)
downloadlinux-linaro-53e9a6159fdc6419874ce4d86d3577dbedc77b62.tar.gz
[PATCH] VM: zone reclaim atomic ops cleanup
Christoph Lameter and Marcelo Tosatti asked to get rid of the atomic_inc_and_test() to cleanup the atomic ops in the zone reclaim code. Signed-off-by: Martin Hicks <mort@sgi.com> Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm')
-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 620aa11b24e..d157dae8c9f 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 ab631a3c62c..0095533cdde 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;
}