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    SubjectRe: [PATCH 4/6] mm: kswapd: Reset kswapd_max_order and classzone_idx after reading
    On Thu,  9 Dec 2010 11:18:18 +0000
    Mel Gorman <mel@csn.ul.ie> 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@csn.ul.ie>
    Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>



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