diff options
| author | Martin Hicks <mort@bork.org> | 2005-09-03 15:54:51 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@evo.osdl.org> | 2005-09-05 00:05:44 -0700 |
| commit | 53e9a6159fdc6419874ce4d86d3577dbedc77b62 (patch) | |
| tree | 7c7f15325569cf5e02dafc1974fb080154616058 /mm/vmscan.c | |
| parent | bce5f6ba340b09d8b29902add204bb95a6d3d88b (diff) | |
| download | lwn-53e9a6159fdc6419874ce4d86d3577dbedc77b62.tar.gz lwn-53e9a6159fdc6419874ce4d86d3577dbedc77b62.zip | |
[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/vmscan.c')
| -rw-r--r-- | mm/vmscan.c | 9 |
1 files changed, 5 insertions, 4 deletions
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; } |