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    SubjectRe: 2.4.19-preX: What we really need: -AA patches finally in thetree
    On Wed, 27 Feb 2002, Martin Knoblauch wrote:
    > Rik van Riel wrote:
    > > On Wed, 27 Feb 2002, Martin Knoblauch wrote:
    > >
    > > > > > Not to begin the flamewar, but no thanks. rmap-12f blows -aa away AFAIK
    > > > > > on this P200 w/ 64MB ram.
    > > > >
    > > > > rmap still sucks on large systems though. I'd love to see rmap
    > > > > in the main kernel, but it needs to get the scalability fixed first.
    > > > > The main problem seems to be pagemap_lru_lock ... Rik & crew
    > > > > know about this problem, but let's give them some time to fix it
    > > > > before rmap gets put into mainline ....
    > > >
    > > > just out of curiosity: where does "large systems" start in your
    > > > context?
    > >
    > > My guess it would start at about 4 or 8 CPUs.
    > >
    > > Systems which have a lot of pagetable overhead would also
    > > suffer with -rmap, until -rmap supports pte_highmem.
    >
    > So, what about a Dual-Athlon system with 2-3 GB of memory? Large
    > system, or just a peanut? :-)

    Unless you're overburdening the system with Oracle -rmap should
    run just fine.

    regards,

    Rik
    --
    "Linux holds advantages over the single-vendor commercial OS"
    -- Microsoft's "Competing with Linux" document

    http://www.surriel.com/ http://distro.conectiva.com/

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