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Date: Wed, 11 Nov 2009 11:02:11 +0900 (JST)
From: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To: LKML <linux-kernel@...r.kernel.org>
Cc: kosaki.motohiro@...fujitsu.com, linux-mm <linux-mm@...ck.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Minchan Kim <minchan.kim@...il.com>,
Rik van Riel <riel@...hat.com>,
"Rafael J. Wysocki" <rjw@...k.pl>
Subject: [PATCH 3/5] vmscan: zone_reclaim() don't use insane swap_cluster_max
In old days, we didn't have sc.nr_to_reclaim and it brought
sc.swap_cluster_max misuse.
huge sc.swap_cluster_max might makes unnecessary OOM risk and
no performance benefit.
Now, we can stop its insane thing.
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Reviewed-by: Rik van Riel <riel@...hat.com>
Reviewed-by: Minchan Kim <minchan.kim@...il.com>
---
mm/vmscan.c | 3 +--
1 files changed, 1 insertions(+), 2 deletions(-)
diff --git a/mm/vmscan.c b/mm/vmscan.c
index eebd260..d0422a8 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2458,8 +2458,7 @@ static int __zone_reclaim(struct zone *zone, gfp_t gfp_mask, unsigned int order)
.may_writepage = !!(zone_reclaim_mode & RECLAIM_WRITE),
.may_unmap = !!(zone_reclaim_mode & RECLAIM_SWAP),
.may_swap = 1,
- .swap_cluster_max = max_t(unsigned long, nr_pages,
- SWAP_CLUSTER_MAX),
+ .swap_cluster_max = SWAP_CLUSTER_MAX,
.nr_to_reclaim = max_t(unsigned long, nr_pages,
SWAP_CLUSTER_MAX),
.gfp_mask = gfp_mask,
--
1.6.2.5
--
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