On Fri, 10 Dec 2010, Mel Gorman wrote: > When kswapd wakes up, it reads its order and classzone from pgdat and > calls balance_pgdat. While its awake, it potentially reclaimes at a high > order and a low classzone index. This might have been a once-off that > was not required by subsequent callers. However, because the pgdat > values were not reset, they remain artifically high while > balance_pgdat() is running and potentially kswapd enters a second > unnecessary reclaim cycle. Reset the pgdat order and classzone index > after reading. > > 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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