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    SubjectRe: Linux Status For 2.3.x: v 2.3.43
    Hi,

    On Fri, 11 Feb 2000 13:35:18 +0100 (CET), Ingo Molnar
    <mingo@chiara.csoma.elte.hu> said:

    >> Page cache high on PAE36 boxes is very slow, maybe disable ?

    > This is new to me - pagecache in highmem is just as fast here as in
    > lowmem (as far as dbench numbers go). If there is any problem i'd like
    > to hear about it.

    Here too --- actual IO performance is not measurably difference. Doing
    disk IO to highmem page cache pages is going to use a little more CPU
    time due to the necessary bounce buffer copying, but I can't see a
    measurable difference on page cache performance with highmem enabled
    compared to using low memory on PAE36.

    --Stephen

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