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    SubjectRe: [PATCH] vmscan: bail out of page reclaim after swap_cluster_max pages
    > Sometimes the VM spends the first few priority rounds rotating back
    > referenced pages and submitting IO. Once we get to a lower priority,
    > sometimes the VM ends up freeing way too many pages.
    > The fix is relatively simple: in shrink_zone() we can check how many
    > pages we have already freed, direct reclaim tasks break out of the
    > scanning loop if they have already freed enough pages and have reached
    > a lower priority level.
    > However, in order to do this we do need to know how many pages we already
    > freed, so move nr_reclaimed into scan_control.
    > Signed-off-by: Rik van Riel <>
    > ---
    > Kosaki, this should address the zone scanning pressure issue.

    hmmmm. I still don't like the behavior when priority==DEF_PRIORITY.
    but I also should explain by code and benchmark.

    therefore, I'll try to mesure this patch in this week.


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      Last update: 2008-11-25 12:49    [W:0.022 / U:8.548 seconds]
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