linux-kernel - [PATCH 2/7] memcg: mem_cgroup_shrink_node

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Date:	Fri, 16 Jul 2010 19:14:15 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	LKML <linux-kernel@...r.kernel.org>, linux-mm <linux-mm@...ck.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Mel Gorman <mel@....ul.ie>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Nishimura Daisuke <d-nishimura@....biglobe.ne.jp>
Cc:	kosaki.motohiro@...fujitsu.com
Subject: [PATCH 2/7] memcg: mem_cgroup_shrink_node_zone() doesn't need sc.nodemask

Currently mem_cgroup_shrink_node_zone() call shrink_zone() directly.
thus it doesn't need to initialize sc.nodemask. shrink_zone() doesn't
use it at all.

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
---
 include/linux/swap.h |    3 +--
 mm/memcontrol.c      |    3 +--
 mm/vmscan.c          |    8 ++------
 3 files changed, 4 insertions(+), 10 deletions(-)

diff --git a/include/linux/swap.h b/include/linux/swap.h
index ff4acea..bf4eb62 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -244,8 +244,7 @@ extern unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *mem,
 extern unsigned long mem_cgroup_shrink_node_zone(struct mem_cgroup *mem,
 						gfp_t gfp_mask, bool noswap,
 						unsigned int swappiness,
-						struct zone *zone,
-						int nid);
+						struct zone *zone);
 extern int __isolate_lru_page(struct page *page, int mode, int file);
 extern unsigned long shrink_all_memory(unsigned long nr_pages);
 extern int vm_swappiness;
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index aba4310..01f38ff 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1307,8 +1307,7 @@ static int mem_cgroup_hierarchical_reclaim(struct mem_cgroup *root_mem,
 		/* we use swappiness of local cgroup */
 		if (check_soft)
 			ret = mem_cgroup_shrink_node_zone(victim, gfp_mask,
-				noswap, get_swappiness(victim), zone,
-				zone->zone_pgdat->node_id);
+				noswap, get_swappiness(victim), zone);
 		else
 			ret = try_to_free_mem_cgroup_pages(victim, gfp_mask,
 						noswap, get_swappiness(victim));
diff --git a/mm/vmscan.c b/mm/vmscan.c
index bd1d035..be860a0 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1929,7 +1929,7 @@ unsigned long try_to_free_pages(struct zonelist *zonelist, int order,
 unsigned long mem_cgroup_shrink_node_zone(struct mem_cgroup *mem,
 						gfp_t gfp_mask, bool noswap,
 						unsigned int swappiness,
-						struct zone *zone, int nid)
+						struct zone *zone)
 {
 	struct scan_control sc = {
 		.nr_to_reclaim = SWAP_CLUSTER_MAX,
@@ -1940,13 +1940,9 @@ unsigned long mem_cgroup_shrink_node_zone(struct mem_cgroup *mem,
 		.order = 0,
 		.mem_cgroup = mem,
 	};
-	nodemask_t nm  = nodemask_of_node(nid);
-
 	sc.gfp_mask = (gfp_mask & GFP_RECLAIM_MASK) |
 			(GFP_HIGHUSER_MOVABLE & ~GFP_RECLAIM_MASK);
-	sc.nodemask = &nm;
-	sc.nr_reclaimed = 0;
-	sc.nr_scanned = 0;
+
 	/*
 	 * NOTE: Although we can get the priority field, using it
 	 * here is not a good idea, since it limits the pages we can scan.
-- 
1.6.5.2



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