path: root/mm
diff options
authorJohannes Weiner <hannes@cmpxchg.org>2009-03-31 15:19:38 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-04-01 08:59:12 -0700
commitbd2f6199cf9af472aeefa1b642c9f504f19e6008 (patch)
treeba8cd5e7d940bcac161e28872998f86a2910362b /mm
parentmm: add comment why mark_page_accessed() would be better than pte_mkyoung() in follow_page() (diff)
vmscan: respect higher order in zone_reclaim()
During page allocation, there are two stages of direct reclaim that are applied to each zone in the preferred list. The first stage using zone_reclaim() reclaims unmapped file backed pages and slab pages if over defined limits as these are cheaper to reclaim. The caller specifies the order of the target allocation but the scan control is not being correctly initialised. The impact is that the correct number of pages are being reclaimed but that lumpy reclaim is not being applied. This increases the chances of a full direct reclaim via try_to_free_pages() is required. This patch initialises the order field of the scan control as requested by the caller. [mel@csn.ul.ie: rewrote changelog] Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Mel Gorman <mel@csn.ul.ie> Cc: Rik van Riel <riel@redhat.com> Cc: Andy Whitcroft <apw@shadowen.org> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 9578063cd943..51f2df04d7cf 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2295,6 +2295,7 @@ static int __zone_reclaim(struct zone *zone, gfp_t gfp_mask, unsigned int order)
.gfp_mask = gfp_mask,
.swappiness = vm_swappiness,
+ .order = order,
.isolate_pages = isolate_pages_global,
unsigned long slab_reclaimable;