From: Mel Gorman <mgorman@suse.de>
To: Linux-MM <linux-mm@kvack.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>,
Minchan Kim <minchan.kim@gmail.com>, Jan Kara <jack@suse.cz>,
Andy Isaacson <adi@hexapodia.org>,
Johannes Weiner <jweiner@redhat.com>,
Mel Gorman <mgorman@suse.de>, Rik van Riel <riel@redhat.com>,
Nai Xia <nai.xia@gmail.com>, LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH 02/11] mm: compaction: Use synchronous compaction for /proc/sys/vm/compact_memory
Date: Thu, 1 Dec 2011 17:36:12 +0000 [thread overview]
Message-ID: <1322760981-28719-3-git-send-email-mgorman@suse.de> (raw)
In-Reply-To: <1322760981-28719-1-git-send-email-mgorman@suse.de>
When asynchronous compaction was introduced, the
/proc/sys/vm/compact_memory handler should have been updated to always
use synchronous compaction. This did not happen so this patch addresses
it. The assumption is if a user writes to /proc/sys/vm/compact_memory,
they are willing for that process to stall.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Andrea Arcangeli <aarcange@redhat.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
---
mm/compaction.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/mm/compaction.c b/mm/compaction.c
index 237560e..615502b 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -666,6 +666,7 @@ static int compact_node(int nid)
.nr_freepages = 0,
.nr_migratepages = 0,
.order = -1,
+ .sync = true,
};
zone = &pgdat->node_zones[zoneid];
--
1.7.3.4
--
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next prev parent reply other threads:[~2011-12-01 17:36 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-01 17:36 [PATCH 0/11] Reduce compaction-related stalls and improve asynchronous migration of dirty pages v5 Mel Gorman
2011-12-01 17:36 ` [PATCH 01/11] mm: compaction: Allow compaction to isolate dirty pages Mel Gorman
2011-12-01 17:36 ` Mel Gorman [this message]
2011-12-01 17:36 ` [PATCH 03/11] mm: vmscan: Check if we isolated a compound page during lumpy scan Mel Gorman
2011-12-01 17:36 ` [PATCH 04/11] mm: vmscan: Do not OOM if aborting reclaim to start compaction Mel Gorman
2011-12-01 17:36 ` [PATCH 05/11] mm: compaction: Determine if dirty pages can be migrated without blocking within ->migratepage Mel Gorman
2011-12-01 17:36 ` [PATCH 06/11] mm: compaction: make isolate_lru_page() filter-aware again Mel Gorman
2011-12-01 17:36 ` [PATCH 07/11] mm: page allocator: Do not call direct reclaim for THP allocations while compaction is deferred Mel Gorman
2011-12-01 17:36 ` [PATCH 08/11] mm: compaction: Introduce sync-light migration for use by compaction Mel Gorman
2011-12-01 17:36 ` [PATCH 09/11] mm: vmscan: When reclaiming for compaction, ensure there are sufficient free pages available Mel Gorman
2011-12-01 17:36 ` [PATCH 10/11] mm: vmscan: Check if reclaim should really abort even if compaction_ready() is true for one zone Mel Gorman
2011-12-01 17:36 ` [PATCH 11/11] mm: Isolate pages for immediate reclaim on their own LRU Mel Gorman
-- strict thread matches above, loose matches on Subject: below --
2011-12-14 15:41 [PATCH 0/11] Reduce compaction-related stalls and improve asynchronous migration of dirty pages v6 Mel Gorman
2011-12-14 15:41 ` [PATCH 02/11] mm: compaction: Use synchronous compaction for /proc/sys/vm/compact_memory Mel Gorman
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