Re: VM tuning patch, take 2

[Marcelo Tosatti <marcelo@conectiva.com.br>]

On Thu, 7 Jun 2001, Jonathan Morton wrote:

> - new pages are still given an age of PAGE_AGE_START, which is 2.
> PAGE_AGE_ADV has been increased to 4, and PAGE_AGE_MAX to 128.  Pages which
> are demand-paged in from swap are given an initial age of PAGE_AGE_MAX/2,
> or 64 - this should help to keep these (expensive) pages around for as long
> as possible.  Ageing down is now done using a decrement instead of a
> division by 2, preserving the age information for longer.

Just one comment about this specific change. I would not like to tweak the
PAGE_AGE_* values until we have centralized page aging. (ie only kswapd
doing the aging) 


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