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    SubjectRe: [PATCH] Re: 2.4.9-ac15 painfully sluggish
    On Tue, Sep 25, 2001 at 04:32:13PM -0300, Rik van Riel wrote:

    > > The problem seems to be related in pages not moved to swap but
    > > being discarded somehow and reread later on.... just a guess.
    > I've made a small patch to 2.4.9-ac15 which should make
    > page_launder() smoother, make some (very minor) tweaks
    > to page aging and updates various comments in vmscan.c
    > It's below this email and at:

    With this -painfully applied- patch, all seems a lot better. However, it
    still seems more sluggish than 2.4.9-ac12.

    Haven't bothered testing -ac13 and -ac14.

    Swapping still seems to be a problem though, as this kernel happily claims
    several tens of MBs of swap, and then, out of the blue, starts writing pages
    out in huge blocks.

    The vmstat info just disappeared from my screen, while stressing the
    vm-system by doing a large parallel build, however, it showed no paging
    happening during long times (20-30 secs) and then suddenly writing 30 MB in
    one go.

    Doesn't seem very smooth to me, where can I get my refund? :)

    (if you'd like more details, please ask, I can do some testing)

    Q_. Jasper Spaans <>
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