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    SubjectRe: [RFC] VM: I have a dream...
    >>>>> "Jamie" == Jamie Lokier <jamie@shareable.org> writes:

    Jamie> Chase Venters wrote:
    >> Just as a curiosity... does anyone have any guesses as to the
    >> runtime performance cost of hosting one or more swap files (which
    >> thanks to on demand creation and growth are presumably built of
    >> blocks scattered around the disk) versus having one or more simple
    >> contiguous swap partitions?

    >> I think it's probably a given that swap partitions are better; I'm
    >> just curious how much better they might actually be.

    Jamie> When programs must access files in addition to swapping, and
    Jamie> that includes demand-paged executable files, swap files have
    Jamie> the _potential_ to be faster because they provide opportunities
    Jamie> to use the disk nearer the files which are being accessed.

    If you can, put your swap on a different spindle...


    Actually, the original poster's `dream' looked a lot like a
    single-address-space operating system, such as Mungi (
    http://www.cse.unsw.edu.au/~disy/Mungi/ )
    --
    Dr Peter Chubb http://www.gelato.unsw.edu.au peterc AT gelato.unsw.edu.au
    http://www.ertos.nicta.com.au ERTOS within National ICT Australia
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