Re: [PATCH] (1/2) reverse mapping VM for 2.5.23 (rmap-13b)

Craig Kulesa
2002-06-19T20:22:16Z

On Wed, 19 Jun 2002, Ingo Molnar wrote:

> 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.]

Agree. Heightened swapout in this rather simplified example) isn't a
problem in itself, unless it really turns out to be a bottleneck in a
wide variety of loads. As long as the *right* pages are being swapped
and don't have to be paged right back in again.

I'll try a more varied set of tests tonight, with cpu usage tabulated.

-Craig