Re: 2.1.110 freepages.min change

Rik van Riel (H.H.vanRiel@phys.uu.nl)
Wed, 22 Jul 1998 23:49:00 +0200 (CEST)

On Wed, 22 Jul 1998, Linus Torvalds wrote:
> On Wed, 22 Jul 1998, Rik van Riel wrote:
> >
> > I've noticed that, in 2.1.110, the value for the
> > minimum amount of free pages changed from 48 to
> > 10.
>
> Note that that limit is only for a 4MB machine, with even 8MB the
> calculations will force it to be 16, and with 32MB it will be 64 pages
> free. And that's just the minimum number, so normally kswapd will try to
> keep 30 pages free even in a 4MB environment..

But didn't your calculations from a few days ago show that
you'd need at least 5% of free memory to be reasonably
certain to have a contiguous 8kB region free.

For 4MB, that means 50 pages... Then the minimum for
freepages.min will change to 16 (the same limit as is
currently kept on SPARC/Linux)

Rik.
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