Re: Happiness with t8-vmpatch4 (was Re: Does page-aging reallywork?)

[Rik van Riel <riel@conectiva.com.br>]

On Sat, 16 Sep 2000, Benjamin Redelings I wrote:

> > This is indeed something to look at. Maybe we could give
> > idle processes (sleeping for more than 20 seconds?) a
> > "full" swap_cnt instead of swap_cnt = rss >> SWAP_SHIFT ?
>
>  This doesn't seem like it should be necessary.  Right now,
> unused processes ARE swapped preferentially (and completely) -
> its just that swapping happens all of a sudden.

We may be able to fix that by swapping long-idle processes
before we have eaten all of the cache. 

> 	Evicting unused pages, either from the cache or from
> process can have significant benefits on my machine (64Mb).  
> Once swapping triggered, 20Mb were paged out, and stayed out.  
> If these 20 Mb had been paged out before, then I would have had
> 20Mb more cache to work with, which is 31% of my memory.  Go
> figure :)

*nod*

> BTW, with test8-vmpatch4, I am gettings zillions of "VM:
> page_launder, found pre-cleaned page ?!" messages.

No you're not. That's test8-vmpatch3.
This is fixed in -vmpatch4...

(and the comments in the code have been
updated to explain how and what)

regards,

Rik
--
"What you're running that piece of shit Gnome?!?!"
       -- Miguel de Icaza, UKUUG 2000

http://www.conectiva.com/		http://www.surriel.com/

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