From: Andrea Arcangeli <aarcange@redhat.com>
To: linux-mm@kvack.org
Cc: 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>,
Hush Bensen <hush.bensen@gmail.com>
Subject: [PATCH 06/10] mm: zone_reclaim: compaction: increase the high order pages in the watermarks
Date: Tue, 16 Jul 2013 15:41:50 +0200 [thread overview]
Message-ID: <1373982114-19774-7-git-send-email-aarcange@redhat.com> (raw)
In-Reply-To: <1373982114-19774-1-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 d94503d..f5ea1147 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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next prev parent reply other threads:[~2013-07-16 13:42 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-16 13:41 [PATCH 00/10] adding compaction to zone_reclaim_mode > 0 #2 Andrea Arcangeli
2013-07-16 13:41 ` [PATCH 01/10] mm: zone_reclaim: remove ZONE_RECLAIM_LOCKED Andrea Arcangeli
2013-07-16 23:45 ` Wanpeng Li
2013-07-16 23:45 ` Wanpeng Li
2013-07-16 13:41 ` [PATCH 02/10] mm: zone_reclaim: compaction: scan all memory with /proc/sys/vm/compact_memory Andrea Arcangeli
2013-07-16 23:29 ` Wanpeng Li
2013-07-16 23:29 ` Wanpeng Li
2013-07-16 13:41 ` [PATCH 03/10] mm: zone_reclaim: compaction: don't depend on kswapd to invoke reset_isolation_suitable Andrea Arcangeli
2013-07-16 23:32 ` Wanpeng Li
2013-07-16 23:32 ` Wanpeng Li
2013-07-16 13:41 ` [PATCH 04/10] mm: zone_reclaim: compaction: reset before initializing the scan cursors Andrea Arcangeli
2013-07-16 23:31 ` Wanpeng Li
2013-07-16 23:31 ` Wanpeng Li
2013-07-16 13:41 ` [PATCH 05/10] mm: compaction: don't require high order pages below min wmark Andrea Arcangeli
2013-07-17 8:13 ` Hush Bensen
2013-07-17 17:15 ` Andrea Arcangeli
2013-07-16 13:41 ` Andrea Arcangeli [this message]
2013-07-16 13:41 ` [PATCH 07/10] mm: zone_reclaim: compaction: export compact_zone_order() Andrea Arcangeli
2013-07-16 13:41 ` [PATCH 08/10] mm: zone_reclaim: only run zone_reclaim in the fast path Andrea Arcangeli
2013-07-16 13:41 ` [PATCH 09/10] mm: zone_reclaim: after a successful zone_reclaim check the min watermark Andrea Arcangeli
2013-07-16 13:41 ` [PATCH 10/10] mm: zone_reclaim: compaction: add compaction to zone_reclaim_mode Andrea Arcangeli
2013-07-17 8:20 ` Hush Bensen
2013-07-17 17:20 ` Andrea Arcangeli
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