From: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
congestion_wait() mean "waiting queue congestion is cleared". However,
synchronous lumpy reclaim does not need this congestion_wait() as
shrink_page_list(PAGEOUT_IO_SYNC) uses wait_on_page_writeback()
and it provides the necessary waiting.
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Signed-off-by: Mel Gorman <mel@xxxxxxxxx>
Reviewed-by: Minchan Kim <minchan.kim@xxxxxxxxx>
Reviewed-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Reviewed-by: Wu Fengguang <fengguang.wu@xxxxxxxxx>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
---
mm/vmscan.c | 2 --
1 files changed, 0 insertions(+), 2 deletions(-)
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 652650f..e8b5224 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1341,8 +1341,6 @@ shrink_inactive_list(unsigned long nr_to_scan, struct zone *zone,
/* Check if we should syncronously wait for writeback */
if (should_reclaim_stall(nr_taken, nr_reclaimed, priority, sc)) {
- congestion_wait(BLK_RW_ASYNC, HZ/10);
-
/*
* The attempt at page out may have made some
* of the pages active, mark them inactive again.
--
1.7.1
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