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Subject[PATCH 1/2] vmscan: shrink_slab() require number of lru_pages, not page order
Date
Fix simple argument error. Usually 'order' is very small value than
lru_pages. then it can makes unnecessary icache dropping.

Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: Rik van Riel <riel@redhat.com>
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
---
mm/vmscan.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 0ebfe12..c927948 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2611,6 +2611,7 @@ static int __zone_reclaim(struct zone *zone, gfp_t gfp_mask, unsigned int order)

slab_reclaimable = zone_page_state(zone, NR_SLAB_RECLAIMABLE);
if (slab_reclaimable > zone->min_slab_pages) {
+ unsigned long lru_pages = zone_reclaimable_pages(zone);
/*
* shrink_slab() does not currently allow us to determine how
* many pages were freed in this zone. So we take the current
@@ -2621,7 +2622,7 @@ static int __zone_reclaim(struct zone *zone, gfp_t gfp_mask, unsigned int order)
* Note that shrink_slab will free memory on all zones and may
* take a long time.
*/
- while (shrink_slab(sc.nr_scanned, gfp_mask, order) &&
+ while (shrink_slab(sc.nr_scanned, gfp_mask, lru_pages) &&
zone_page_state(zone, NR_SLAB_RECLAIMABLE) >
slab_reclaimable - nr_pages)
;
--
1.6.5.2




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