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vmscan: synchronous lumpy reclaim should not call congestion_wait()

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congestion_wait() means "wait until 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@jp.fujitsu.com>
Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
Reviewed-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Wu Fengguang <fengguang.wu@intel.com>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
KOSAKI Motohiro 2010-10-26 14:21:41 -07:00 committed by Linus Torvalds
parent 52bb919866
commit bc57e00f5e
1 changed files with 0 additions and 2 deletions
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2
mm/vmscan.c
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@ -1340,8 +1340,6 @@ shrink_inactive_list(unsigned long nr_to_scan, struct zone *zone,
/* Check if we should syncronously wait for writeback */ /* Check if we should syncronously wait for writeback */
if (should_reclaim_stall(nr_taken, nr_reclaimed, priority, sc)) { 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 * The attempt at page out may have made some
* of the pages active, mark them inactive again. * of the pages active, mark them inactive again.