shrink_zones() need relatively long time. and lru_pages can be
changed dramatically while shrink_zones().
then, lru_pages need recalculate on each priority.
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
---
mm/vmscan.c | 21 ++++++++-------------
1 files changed, 8 insertions(+), 13 deletions(-)
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 0c961f1..0ebfe12 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1785,7 +1785,6 @@ static unsigned long do_try_to_free_pages(struct zonelist *zonelist,
bool all_unreclaimable;
unsigned long total_scanned = 0;
struct reclaim_state *reclaim_state = current->reclaim_state;
- unsigned long lru_pages = 0;
struct zoneref *z;
struct zone *zone;
enum zone_type high_zoneidx = gfp_zone(sc->gfp_mask);
@@ -1796,18 +1795,6 @@ static unsigned long do_try_to_free_pages(struct zonelist *zonelist,
if (scanning_global_lru(sc))
count_vm_event(ALLOCSTALL);
- /*
- * mem_cgroup will not do shrink_slab.
- */
- if (scanning_global_lru(sc)) {
- for_each_zone_zonelist(zone, z, zonelist, high_zoneidx) {
-
- if (!cpuset_zone_allowed_hardwall(zone, GFP_KERNEL))
- continue;
-
- lru_pages += zone_reclaimable_pages(zone);
- }
- }
for (priority = DEF_PRIORITY; priority >= 0; priority--) {
sc->nr_scanned = 0;
@@ -1819,6 +1806,14 @@ static unsigned long do_try_to_free_pages(struct zonelist *zonelist,
* over limit cgroups
*/
if (scanning_global_lru(sc)) {
+ unsigned long lru_pages = 0;
+ for_each_zone_zonelist(zone, z, zonelist, high_zoneidx) {
+ if (!cpuset_zone_allowed_hardwall(zone, GFP_KERNEL))
+ continue;
+
+ lru_pages += zone_reclaimable_pages(zone);
+ }
+
shrink_slab(sc->nr_scanned, sc->gfp_mask, lru_pages);
if (reclaim_state) {
sc->nr_reclaimed += reclaim_state->reclaimed_slab;
--
1.6.5.2
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