On Wed, 19 Jun 2002, Ingo Molnar wrote:

On Wed, 19 Jun 2002, Rik van Riel wrote:

quoted

I am encouraged by Craig's test results, which show that
rmap did a LOT less swapin IO and rmap with page aging even
less. The fact that it did too much swapout IO means one
part of the system needs tuning but doesn't say much about
the thing as a whole.

btw., isnt there a fair chance that by 'fixing' the aging+rmap code to
swap out less, you'll ultimately swap in more? [because the extra swappout
likely ended up freeing up RAM as well, which in turn decreases the amount
of trashing.]

Possibly, but I expect the 'extra' swapouts to be caused
by page_launder writing out too many pages at once and not
just the ones it wants to free.

Cleaning pages and freeing them are separate operations,
what is missing is a mechanism to clean enoughh pages but
not all inactive pages at once ;)

regards,

Rik
-- 
Bravely reimplemented by the knights who say "NIH".

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

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/