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SubjectRe: dirty pages (Was: Re: [PATCH] Prevent large file writeback starvation)
Johannes Stezenbach <js@linuxtv.org> wrote:
>
> On Mon, Feb 13, 2006, Andrew Morton wrote:
> > Johannes Stezenbach <js@linuxtv.org> wrote:
> > > Now copying a 700MB file makes "Dirty" go up to 350MB. It then
> > > slowly decreases to 325MB and stays there.
> >
> > It shouldn't. Did you really leave it for long enough?
> >
> > If you did, then why does it happen there and not here?
>
> Good question. I just repeated the execise, rebooted and
> copied a 700MB file. After ~30min "Dirty" is down to ~130MB, and
> continues to decrease very slowly.
>
> On my Desktop machine (P4 HT, 1G RAM) "Dirty" goes down near
> zero after ~30sec, as expected.

Are you using any unusual mount options?

Which filesystem types are online (not that this should affect it...)
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