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    SubjectRe: Linux 2.4.1-ac7
    On Sat, 10 Feb 2001, Mike Galbraith wrote:
    > On Sat, 10 Feb 2001, Rik van Riel wrote:
    > > On Sat, 10 Feb 2001, Marcelo Tosatti wrote:
    > > > On Sat, 10 Feb 2001, Mike Galbraith wrote:
    > > >
    > > > > This change makes my box swap madly under load.
    > > >
    > > > Swapped out pages were not being counted in the flushing limitation.
    > > >
    > > > Could you try the following patch?
    > >
    > > Marcelo's patch should do the trick wrt. to making page_launder()
    > > well-behaved again. It should fix the problems some people have
    > > seen with bursty swap behaviour.
    >
    > It's still reluctant to shrink cache. I'm hitting I/O saturation
    > at 20 jobs vs 30 with ac5. (difference seems to be the delta in
    > space taken by cache.. ~same space shows as additional swap volume).

    Indeed, to "fix" that we'll need to work at refill_inactive().

    However, I am very much against tuning the VM for one particular
    workload. If you can show me that this problem also happens under
    other workloads we can work at changing it, but I don't think it's
    right to optimise the VM for a specific workload...

    regards,

    Rik
    --
    Linux MM bugzilla: http://linux-mm.org/bugzilla.shtml

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

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