[PATCH 01/27] mm, page_alloc: Use ac->classzone_idx instead of... | linux-mm

[RFC PATCH 00/27] Move LRU page reclaim from zones to nodes v2 · Mel Gorman <hidden> · 2016-02-23
[PATCH 03/27] mm, vmstat: Add infrastructure for per-node vmstats · Mel Gorman <hidden> · 2016-02-23
[PATCH 02/27] mm, vmscan: Check if cpusets are enabled during direct reclaim · Mel Gorman <hidden> · 2016-02-23
[PATCH 01/27] mm, page_alloc: Use ac->classzone_idx instead of zone_idx(preferred_zone) · Mel Gorman <hidden> · 2016-02-23
[PATCH 04/27] mm, vmscan: Move lru_lock to the node · Mel Gorman <hidden> · 2016-02-23
[PATCH 07/27] mm, vmscan: Have kswapd only scan based on the highest requested zone · Mel Gorman <hidden> · 2016-02-23
[PATCH 14/27] mm, memcg: Move memcg limit enforcement from zones to nodes · Mel Gorman <hidden> · 2016-02-23
[PATCH 15/27] mm, workingset: Make working set detection node-aware · Mel Gorman <hidden> · 2016-02-23
[PATCH 13/27] mm, vmscan: Make shrink_node decisions more node-centric · Mel Gorman <hidden> · 2016-02-23
[PATCH 05/27] mm, vmscan: Move LRU lists to node · Mel Gorman <hidden> · 2016-02-23
[PATCH 08/27] mm, vmscan: Make kswapd reclaim in terms of nodes · Mel Gorman <hidden> · 2016-02-23
[PATCH 09/27] mm, vmscan: Simplify the logic deciding whether kswapd sleeps · Mel Gorman <hidden> · 2016-02-23
[PATCH 12/27] mm: vmscan: Do not reclaim from kswapd if there is any eligible zone · Mel Gorman <hidden> · 2016-02-23
[PATCH 11/27] mm, vmscan: Clear congestion, dirty and need for compaction on a per-node basis · Mel Gorman <hidden> · 2016-02-23
[PATCH 10/27] mm, vmscan: By default have direct reclaim only shrink once per node · Mel Gorman <hidden> · 2016-02-23
[PATCH 06/27] mm, vmscan: Begin reclaiming pages on a per-node basis · Mel Gorman <hidden> · 2016-02-23

STALE3795d

Revisions (2)

2016-02-23 rfc current
2016-02-23 rfc [diff vs current]

[PATCH 01/27] mm, page_alloc: Use ac->classzone_idx instead of zone_idx(preferred_zone)

From: Mel Gorman <hidden>
Date: 2016-02-23 13:45:32
Also in: lkml
Subsystem: memory management, memory management - page allocator, the rest · Maintainers: Andrew Morton, Vlastimil Babka, Linus Torvalds

ac->classzone_idx is determined by the index of the preferred zone and cached
to avoid repeated calculations. wake_all_kswapds() should use it instead of
using zone_idx() within a loop.

Signed-off-by: Mel Gorman <redacted>
---
 mm/page_alloc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index c849a202b6f1..46ecbfa5b228 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c

@@ -3022,7 +3022,7 @@ static void wake_all_kswapds(unsigned int order, const struct alloc_context *ac)
 
 	for_each_zone_zonelist_nodemask(zone, z, ac->zonelist,
 						ac->high_zoneidx, ac->nodemask)
-		wakeup_kswapd(zone, order, zone_idx(ac->preferred_zone));
+		wakeup_kswapd(zone, order, ac->classzone_idx);
 }
 
 static inline int

-- 
2.6.4

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