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    SubjectRe: [PATCH] mm: Implement swap prefetching tweaks
    On Sat, 2006-03-11 at 08:51 +0100, Mike Galbraith wrote:
    > There used to be a pages in flight 'restrictor plate' in there that
    > would have probably helped this situation at least a little. But in
    > any case, it sounds like you'll have to find a way to submit the IO in
    > itty bitty synchronous pieces.

    echo 64 > /sys/block/hd*/queue/max_sectors_kb

    There is basically a straight linear relation between whatever you set
    this to and the maximum scheduling latency you see. It was developed to
    solve the exact problem you are describing.


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