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    SubjectRe: [RFC][PATCH] Re: Linux 2.4.4-ac10
    On Sun, 20 May 2001, Mike Galbraith wrote:
    > On Sat, 19 May 2001, Rik van Riel wrote:
    > > On Sat, 19 May 2001, Mike Galbraith wrote:
    > > > On Fri, 18 May 2001, Stephen C. Tweedie wrote:
    > > >
    > > > > That's the main problem with static parameters. The problem you are
    > > > > trying to solve is fundamentally dynamic in most cases (which is also
    > > > > why magic numbers tend to suck in the VM.)
    > > >
    > > > Magic numbers might be sucking some performance right now ;-)
    > >
    > > ... so you replace them with some others ... ;)
    > I reused one of our base numbers to classify the severity of the
    > situation.. not the same as inventing new ones. (well, not quite
    > the same anyway.. half did come from the south fourty;)

    *nod* ;)

    (not that I'm saying this is bad ... it's just that I'd
    like to know why things work before looking at applying

    > > > (yes, the last hunk looks out of place wrt my text.
    > >
    > > It also looks kind of bogus and geared completely towards this
    > > particular workload ;)
    > I'm not sure why that helps. I didn't put it in as a trick or
    > anything though. I put it in because it didn't seem like a
    > good idea to ever have more cleaned pages than free pages at a
    > time when we're yammering for help.. so I did that and it helped.

    Note that this is not the normal situation. Now think
    about the amount of data you'd be blowing away from the
    inactive_clean pages after a bit of background aging
    has gone on on a lightly loaded system. Not Good(tm)


    Linux MM bugzilla:

    Virtual memory is like a game you can't win;
    However, without VM there's truly nothing to lose...

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