[PATCH 02/11] mm: compaction: Use synchronous compaction for /proc/sys/vm/compact_memory

[Mel Gorman]

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@xxxxxxx>
Reviewed-by: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Reviewed-by: Rik van Riel <riel@xxxxxxxxxx>
Reviewed-by: Minchan Kim <minchan.kim@xxxxxxxxx>
---
 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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