Re: kswapd eats the cpu without swap

[Marcelo Tosatti]

On Tue, 7 Aug 2001, Daniel Phillips wrote:

> On Tuesday 07 August 2001 00:48, BERECZ Szabolcs wrote:
> > On Fri, 3 Aug 2001, Marcelo Tosatti wrote:
> > > Does the problem happen only with the used-once patch ?
> > >
> > > If it also happens without the used-once patch, can you reproduce
> > > the problem with 2.4.6 ?
> >
> > The problem happened about 4 times, with the used-once patch,
> > but I don't know exactly what triggered it.
> >
> > now I use 2.4.7-ac5, and I have not seen the problem, yet.
> >
> > I will try with the used-once patch, if it appears again.
> 
> Please note the additional patch, to be applied after the used-once 
> patch for 2.4.7 and 2.4.7-ac*, or directly to 2.4.8-pre*.  This was 
> posted on lkml and linux-mm on Aug 5 under the subject:
> 
>     [PATCH] Unlazy activate
> 
> which adds the additional behaviour of moving used-twice pages to the 
> active list.

Daniel,

I would like to identify the reason why kswapd is looping like mad instead
trying _any_ fix.

I can't see why unlazy activation would make kswapd not loop like mad
anymore.