[PATCH 01/28] mm, page_alloc: Use ac->classzone_idx instead of zone_idx(preferred_zone)

From	Mel Gorman <mgorman@techsingularity.net>
Newsgroups	linux.kernel
Subject	[PATCH 01/28] mm, page_alloc: Use ac->classzone_idx instead of zone_idx(preferred_zone)
Date	2016-04-12 12:30 +0200
Message-ID	<rn3K2-5ST-39@gated-at.bofh.it> (permalink)
References	<rn3K1-5ST-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Show all headers | View raw

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 <mgorman@techsingularity.net>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
---
 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 4d4079309760..e551f697bc68 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -3139,7 +3139,7 @@ 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, zonelist_zone_idx(ac->preferred_zoneref));
+		wakeup_kswapd(zone, order, ac->classzone_idx);
 }
 
 static inline unsigned int
-- 
2.6.4

Back to linux.kernel | Previous | Next | Find similar | Unroll thread

Thread

[PATCH 01/28] mm, page_alloc: Use ac->classzone_idx instead of zone_idx(preferred_zone) Mel Gorman <mgorman@techsingularity.net> - 2016-04-12 12:30 +0200

csiph-web