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From: Andrea Arcangeli <aarcange@redhat.com>
To: linux-mm@kvack.org
Cc: Johannes Weiner <jweiner@redhat.com>,
	Mel Gorman <mgorman@suse.de>, Rik van Riel <riel@redhat.com>,
	Hugh Dickins <hughd@google.com>,
	Richard Davies <richard@arachsys.com>,
	Shaohua Li <shli@kernel.org>, Rafael Aquini <aquini@redhat.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Hush Bensen <hush.bensen@gmail.com>
Subject: [PATCH 6/9] mm: zone_reclaim: compaction: increase the high order pages in the watermarks
Date: Fri,  2 Aug 2013 18:06:33 +0200	[thread overview]
Message-ID: <1375459596-30061-7-git-send-email-aarcange@redhat.com> (raw)
In-Reply-To: <1375459596-30061-1-git-send-email-aarcange@redhat.com>

Prevent the scaling down to reduce the watermarks too much.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
---
 mm/page_alloc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 4401983..b32ecde 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1665,7 +1665,8 @@ static bool __zone_watermark_ok(struct zone *z, int order, unsigned long mark,
 		free_pages -= z->free_area[o].nr_free << o;
 
 		/* Require fewer higher order pages to be free */
-		min >>= 1;
+		if (o < (pageblock_order >> 2))
+			min >>= 1;
 
 		if (free_pages <= min)
 			return false;

--
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  parent reply	other threads:[~2013-08-02 16:06 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-08-02 16:06 [PATCH 0/9] adding compaction to zone_reclaim_mode v3 Andrea Arcangeli
2013-08-02 16:06 ` [PATCH 1/9] mm: zone_reclaim: remove ZONE_RECLAIM_LOCKED Andrea Arcangeli
2013-08-05 18:30   ` Johannes Weiner
2013-08-07 15:13   ` Mel Gorman
2013-08-02 16:06 ` [PATCH 2/9] mm: zone_reclaim: compaction: scan all memory with /proc/sys/vm/compact_memory Andrea Arcangeli
2013-08-05 18:45   ` Johannes Weiner
2013-08-06  5:50     ` Andrea Arcangeli
2013-08-02 16:06 ` [PATCH 3/9] mm: zone_reclaim: compaction: don't depend on kswapd to invoke reset_isolation_suitable Andrea Arcangeli
2013-08-05 19:32   ` Johannes Weiner
2013-08-02 16:06 ` [PATCH 4/9] mm: zone_reclaim: compaction: reset before initializing the scan cursors Andrea Arcangeli
2013-08-05 19:44   ` Johannes Weiner
2013-08-02 16:06 ` [PATCH 5/9] mm: compaction: don't require high order pages below min wmark Andrea Arcangeli
2013-08-05 18:35   ` Rik van Riel
2013-08-06 13:23   ` Johannes Weiner
2013-08-07 15:42   ` Mel Gorman
2013-08-07 16:14     ` Andrea Arcangeli
2013-08-07 16:47       ` Mel Gorman
2013-08-08  0:59         ` Andrea Arcangeli
2013-08-02 16:06 ` Andrea Arcangeli [this message]
2013-08-05 18:36   ` [PATCH 6/9] mm: zone_reclaim: compaction: increase the high order pages in the watermarks Rik van Riel
2013-08-06 16:08   ` Johannes Weiner
2013-08-06 18:52     ` Johannes Weiner
2013-08-07 13:18     ` Andrea Arcangeli
2013-08-07 15:43   ` Mel Gorman
2013-08-02 16:06 ` [PATCH 7/9] mm: zone_reclaim: compaction: export compact_zone_order() Andrea Arcangeli
2013-08-05 18:37   ` Rik van Riel
2013-08-07 15:48   ` Mel Gorman
2013-08-02 16:06 ` [PATCH 8/9] mm: zone_reclaim: after a successful zone_reclaim check the min watermark Andrea Arcangeli
2013-08-05 18:38   ` Rik van Riel
2013-08-07 15:53   ` Mel Gorman
2013-08-02 16:06 ` [PATCH 9/9] mm: zone_reclaim: compaction: add compaction to zone_reclaim_mode Andrea Arcangeli
2013-08-04 16:55   ` Andrea Arcangeli
2013-08-05 18:38     ` Rik van Riel
2013-08-07 16:18     ` Mel Gorman
2013-08-07 23:48       ` Andrea Arcangeli
2013-08-08  8:22         ` Mel Gorman

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