Re: kswapd in tight loop 2.6.9-rc3-bk-recent

[Nick Piggin]

Andrew Morton wrote:

> Nick Piggin <piggin@xxxxxxxxxxxxxxx> wrote:
>
> > > Chris Wright <chrisw@xxxxxxxx> wrote:
> > >
> > >>(whereas I could get the mainline code, and the
> > >> one-liner to spin right off).  
> > >>
> > >
> > >How?  (up to and including .config please).
> > >
> > >
> > >
> >
> > Ah, free_pages <= pages_high, ie. 0 <= 0, which is true;
> > commence spinning.
>
> Maybe.  It requires that the zonelists be screwy:

Note that if this *was* the problem, then it would not be the fault of
my recent patch, rather *every* allocation (when memory is lowish)
would cause kswapd to wind through its priority loop then stop.
Probably not using enough CPU for anyone to really notice though.

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