Re: [PATCH] VM improvements for 2.1.131

Rik van Riel (H.H.vanRiel@phys.uu.nl)
Thu, 10 Dec 1998 02:10:34 +0100 (CET)

On Thu, 10 Dec 1998, Andrea Arcangeli wrote:
> On Wed, 9 Dec 1998, Rik van Riel wrote:
>
> >This is because 'swapped' data is added to the cache. It also
> >is because without it kswapd would not free memory in swap_out().
> >Then, because it didn't free memory, it would continue to swap
> >out more and more and still more with no effect (remember the
> >removal of page aging?).
>
> Nono, I reversed the vmscan changes on my tree. On my tree when
> swap_out returns 1 it has really freed a page ;).

swap_out() _never_ frees a page any more. It pushes the
pages out to swap and dereferences them so we can free
them with shrink_mmap(). This provides free page aging
and several more benefits.

You can play with the algorithms as much as you want,
however -- I'll be interested to hear about the results...

cheers,

Rik -- the flu hits, the flu hits, the flu hits -- MORE
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