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From: Mel Gorman <mgorman@techsingularity.net>
To: Andrew Morton <akpm@linux-foundation.org>, Linux-MM <linux-mm@kvack.org>
Cc: Rik van Riel <riel@surriel.com>, Vlastimil Babka <vbabka@suse.cz>,
	Johannes Weiner <hannes@cmpxchg.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Mel Gorman <mgorman@techsingularity.net>
Subject: [PATCH 23/31] mm, vmscan: Avoid passing in classzone_idx unnecessarily to shrink_node
Date: Fri,  1 Jul 2016 16:37:38 +0100	[thread overview]
Message-ID: <1467387466-10022-24-git-send-email-mgorman@techsingularity.net> (raw)
In-Reply-To: <1467387466-10022-1-git-send-email-mgorman@techsingularity.net>

shrink_node receives all information it needs about classzone_idx
from sc->reclaim_idx so remove the aliases.

Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
---
 mm/vmscan.c | 20 +++++++++-----------
 1 file changed, 9 insertions(+), 11 deletions(-)

diff --git a/mm/vmscan.c b/mm/vmscan.c
index a6b30fe1de89..6534fbe1b96f 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2426,8 +2426,7 @@ static inline bool should_continue_reclaim(struct pglist_data *pgdat,
 	return true;
 }
 
-static bool shrink_node(pg_data_t *pgdat, struct scan_control *sc,
-			enum zone_type classzone_idx)
+static bool shrink_node(pg_data_t *pgdat, struct scan_control *sc)
 {
 	struct reclaim_state *reclaim_state = current->reclaim_state;
 	unsigned long nr_reclaimed, nr_scanned;
@@ -2653,7 +2652,7 @@ static void shrink_zones(struct zonelist *zonelist, struct scan_control *sc)
 			/* need some check for avoid more shrink_zone() */
 		}
 
-		shrink_node(zone->zone_pgdat, sc, classzone_idx);
+		shrink_node(zone->zone_pgdat, sc);
 	}
 
 	/*
@@ -3077,7 +3076,6 @@ static bool prepare_kswapd_sleep(pg_data_t *pgdat, int order, long remaining,
  * This is used to determine if the scanning priority needs to be raised.
  */
 static bool kswapd_shrink_node(pg_data_t *pgdat,
-			       int classzone_idx,
 			       struct scan_control *sc)
 {
 	struct zone *zone;
@@ -3085,7 +3083,7 @@ static bool kswapd_shrink_node(pg_data_t *pgdat,
 
 	/* Reclaim a number of pages proportional to the number of zones */
 	sc->nr_to_reclaim = 0;
-	for (z = 0; z <= classzone_idx; z++) {
+	for (z = 0; z <= sc->reclaim_idx; z++) {
 		zone = pgdat->node_zones + z;
 		if (!populated_zone(zone))
 			continue;
@@ -3097,7 +3095,7 @@ static bool kswapd_shrink_node(pg_data_t *pgdat,
 	 * Historically care was taken to put equal pressure on all zones but
 	 * now pressure is applied based on node LRU order.
 	 */
-	shrink_node(pgdat, sc, classzone_idx);
+	shrink_node(pgdat, sc);
 
 	/*
 	 * Fragmentation may mean that the system cannot be rebalanced for
@@ -3159,7 +3157,7 @@ static int balance_pgdat(pg_data_t *pgdat, int order, int classzone_idx)
 				if (!populated_zone(zone))
 					continue;
 
-				classzone_idx = i;
+				sc.reclaim_idx = i;
 				break;
 			}
 		}
@@ -3169,12 +3167,12 @@ static int balance_pgdat(pg_data_t *pgdat, int order, int classzone_idx)
 		 * high to low zone to avoid prematurely clearing pgdat
 		 * congested state.
 		 */
-		for (i = classzone_idx; i >= 0; i--) {
+		for (i = sc.reclaim_idx; i >= 0; i--) {
 			zone = pgdat->node_zones + i;
 			if (!populated_zone(zone))
 				continue;
 
-			if (zone_balanced(zone, sc.order, classzone_idx))
+			if (zone_balanced(zone, sc.order, sc.reclaim_idx))
 				goto out;
 		}
 
@@ -3205,7 +3203,7 @@ static int balance_pgdat(pg_data_t *pgdat, int order, int classzone_idx)
 		 * enough pages are already being scanned that that high
 		 * watermark would be met at 100% efficiency.
 		 */
-		if (kswapd_shrink_node(pgdat, classzone_idx, &sc))
+		if (kswapd_shrink_node(pgdat, &sc))
 			raise_priority = false;
 
 		/*
@@ -3677,7 +3675,7 @@ static int __node_reclaim(struct pglist_data *pgdat, gfp_t gfp_mask, unsigned in
 		 * priorities until we have enough memory freed.
 		 */
 		do {
-			shrink_node(pgdat, &sc, classzone_idx);
+			shrink_node(pgdat, &sc);
 		} while (sc.nr_reclaimed < nr_pages && --sc.priority >= 0);
 	}
 
-- 
2.6.4

  parent reply	other threads:[~2016-07-01 15:41 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-07-01 15:37 [PATCH 00/31] Move LRU page reclaim from zones to nodes v8 Mel Gorman
2016-07-01 15:37 ` [PATCH 01/31] mm, vmstat: add infrastructure for per-node vmstats Mel Gorman
2016-07-01 15:37 ` [PATCH 02/31] mm, vmscan: move lru_lock to the node Mel Gorman
2016-07-01 15:37 ` [PATCH 03/31] mm, vmscan: move LRU lists to node Mel Gorman
2016-07-01 15:37 ` [PATCH 04/31] mm, vmscan: begin reclaiming pages on a per-node basis Mel Gorman
2016-07-01 15:37 ` [PATCH 05/31] mm, vmscan: have kswapd only scan based on the highest requested zone Mel Gorman
2016-07-01 15:37 ` [PATCH 06/31] mm, vmscan: make kswapd reclaim in terms of nodes Mel Gorman
2016-07-01 15:37 ` [PATCH 07/31] mm, vmscan: remove balance gap Mel Gorman
2016-07-01 15:37 ` [PATCH 08/31] mm, vmscan: simplify the logic deciding whether kswapd sleeps Mel Gorman
2016-07-01 15:37 ` [PATCH 09/31] mm, vmscan: by default have direct reclaim only shrink once per node Mel Gorman
2016-07-01 15:37 ` [PATCH 10/31] mm, vmscan: remove duplicate logic clearing node congestion and dirty state Mel Gorman
2016-07-01 15:37 ` [PATCH 11/31] mm: vmscan: do not reclaim from kswapd if there is any eligible zone Mel Gorman
2016-07-01 15:37 ` [PATCH 12/31] mm, vmscan: make shrink_node decisions more node-centric Mel Gorman
2016-07-01 15:37 ` [PATCH 13/31] mm, memcg: move memcg limit enforcement from zones to nodes Mel Gorman
2016-07-01 15:37 ` [PATCH 14/31] mm, workingset: make working set detection node-aware Mel Gorman
2016-07-01 15:37 ` [PATCH 15/31] mm, page_alloc: consider dirtyable memory in terms of nodes Mel Gorman
2016-07-01 15:37 ` [PATCH 16/31] mm: move page mapped accounting to the node Mel Gorman
2016-07-01 15:37 ` [PATCH 17/31] mm: rename NR_ANON_PAGES to NR_ANON_MAPPED Mel Gorman
2016-07-01 15:37 ` [PATCH 18/31] mm: move most file-based accounting to the node Mel Gorman
2016-07-01 15:37 ` [PATCH 19/31] mm: move vmscan writes and file write " Mel Gorman
2016-07-01 15:37 ` [PATCH 20/31] mm, vmscan: only wakeup kswapd once per node for the requested classzone Mel Gorman
2016-07-01 15:37 ` [PATCH 21/31] mm, page_alloc: Wake kswapd based on the highest eligible zone Mel Gorman
2016-07-01 15:37 ` [PATCH 22/31] mm: convert zone_reclaim to node_reclaim Mel Gorman
2016-07-01 15:37 ` Mel Gorman [this message]
2016-07-01 15:37 ` [PATCH 24/31] mm, vmscan: Avoid passing in classzone_idx unnecessarily to compaction_ready Mel Gorman
2016-07-01 15:37 ` [PATCH 25/31] mm, vmscan: add classzone information to tracepoints Mel Gorman
2016-07-01 15:37 ` [PATCH 26/31] mm, page_alloc: remove fair zone allocation policy Mel Gorman
2016-07-01 15:37 ` [PATCH 27/31] mm: page_alloc: cache the last node whose dirty limit is reached Mel Gorman
2016-07-01 15:37 ` [PATCH 28/31] mm: vmstat: replace __count_zone_vm_events with a zone id equivalent Mel Gorman
2016-07-01 15:37 ` [PATCH 29/31] mm: vmstat: account per-zone stalls and pages skipped during reclaim Mel Gorman
2016-07-01 15:37 ` [PATCH 30/31] mm, vmstat: print node-based stats in zoneinfo file Mel Gorman
2016-07-01 15:37 ` [PATCH 31/31] mm, vmstat: Remove zone and node double accounting by approximating retries Mel Gorman
2016-07-07 23:27 ` [PATCH 00/31] Move LRU page reclaim from zones to nodes v8 Dave Chinner
2016-07-08  9:52   ` Mel Gorman
2016-07-11  0:47     ` Dave Chinner
2016-07-11  9:02       ` Mel Gorman
2016-07-12  2:52         ` Dave Chinner
2016-07-01 20:01 Mel Gorman
2016-07-01 20:01 ` [PATCH 23/31] mm, vmscan: Avoid passing in classzone_idx unnecessarily to shrink_node Mel Gorman
     [not found] <00e301d1d68b$121ffee0$365ffca0$@alibaba-inc.com>
2016-07-05  7:04 ` Hillf Danton

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