Re: Autoregulate swappiness & inactivation

[Con Kolivas]

Andrew Morton writes:

> Con Kolivas <kernel@xxxxxxxxxxx> wrote:
> >  Ah what the heck. They can only be knocked back to where they already are.
>
> hm.  You get an eGrump for sending two patchs in one email.  Surprisingly
> nice numbers though.
>
> How come vm_swappiness gets squared?  That's the mysterious "bias
> downwards", yes?  What's the theory there?

No real world feedback mechanism is linear. As the pressure grows the 
positive/negative feedback grows exponentially.

> Please define this new term "application pages"?

errm it's fuzzy to say the least. It's the closest I can come to 
representing what end users understand as "non-cached" pages.

> Those si_swapinfo() and si_meminfo() calls need to come out of there.

I'm game. I had the idea but not the skill. Anyone wanna help me with that?

> A diff against Documentation/filesystems/proc.txt will be needed sometime,
> please.

Ok. I'll try and put together one patch that does the lot.

Con

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