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    SubjectRe: kswapd craziness round 2
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    On Fri, Mar 1, 2013 at 1:02 AM, Jiri Slaby <jslaby@suse.cz> wrote:
    >
    > Ok, no difference, kswap is still crazy. I'm attaching the output of
    > "grep -vw '0' /proc/vmstat" if you see something there.
    >
    Thanks to you for test and data.

    Lets try to restore the deleted nap, then.

    Hillf
    --- a/mm/vmscan.c Thu Feb 21 20:01:02 2013
    +++ b/mm/vmscan.c Fri Mar 1 21:55:40 2013
    @@ -2817,6 +2817,10 @@ loop_again:
    */
    if (sc.nr_reclaimed >= SWAP_CLUSTER_MAX)
    break;
    +
    + if (sc.priority < DEF_PRIORITY - 2)
    + congestion_wait(BLK_RW_ASYNC, HZ/10);
    +
    } while (--sc.priority >= 0);

    out:
    --

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