Re: 2.6.10-rc3: kswapd eats CPU on start of memory-eating task

[Nick Piggin]

On Sun, 2004-12-19 at 22:21 -0500, Rik van Riel wrote:
> On Mon, 20 Dec 2004, Con Kolivas wrote:
> 
> > I still suspect the thrash token patch even with the swap token timeout 
> > at 0. Is it completely disabled at 0 or does it still do something?
> 
> It makes it harder to page out pages from the task holding the
> token.  I wonder if kswapd should try to steal the token away
> from the task holding it, so in effect nobody holds the token
> when the system isn't under a heavy swapping load.
> 

In that case, the first thing we need to do is disable thrash token
completely, and retest that. We still don't know for sure that it is
the problem.

I don't have the code in front of me at the moment, but I'll be able
to send a patch to do that in a couple of hours, if nobody beats me
to it.

Nick


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