Re: quicklists confuse meminfo

[Arjan van de Ven]

On Sun, 9 Mar 2008 13:34:32 +0100
Ingo Molnar <mingo@xxxxxxx> wrote:

> 
> * Ingo Molnar <mingo@xxxxxxx> wrote:
> 
> > > IMHO we need shrink pgtable cache mecanism.
> > 
> > ouch! Could you try the patch below? How large is the quicklist
> > cache with this applied?
> 
> hm, Thomas pointed it out that this wont solve all the problems as 
> quicklists have a built-in "preserve me" throttle (which is rather 
> stupid).
> 
> the right solution is to get rid of quicklists altogether (Thomas 
> expects to have patches for that later today).

careful with this; the quicklists aren't JUST for speed
they are also there to make sure a page we free that is a pagetable,
is not reused until we have finished flushing the tlbs on all the cpus that saw it.
This is a really hard correctness requirement, and while I can see
that quicklists are probably not the best way to achieve this, we can't just
throw away the behavior ;(

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