On Fri, 10 Dec 2010, Mel Gorman wrote: > Before kswapd goes to sleep, it uses sleeping_prematurely() to check if > there was a race pushing a zone below its watermark. If the race happened, > it stays awake. However, balance_pgdat() can decide to reclaim at order-0 > if it decides that high-order reclaim is not working as expected. This > information is not passed back to sleeping_prematurely(). The impact is > that kswapd remains awake reclaiming pages long after it should have gone > to sleep. This patch passes the adjusted order to sleeping_prematurely and > uses the same logic as balance_pgdat to decide if it's ok to go to sleep. > > Signed-off-by: Mel Gorman <mel@xxxxxxxxx> > Reviewed-by: Minchan Kim <minchan.kim@xxxxxxxxx> > Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> Reviewed-by: Eric B Munson <emunson@xxxxxxxxx>
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