Re: broken VM in 2.4.10-pre9

Pavel Machek
2001-09-25T19:44:42Z

Hi!

> > So my suggestion was to look at getting anonymous pages backed by what
> > amounts to a shared memory segment. In that vein. By using an extent
> > based data structure we can get the cost down under the current 8 bits
> > per page that we have for the swap counts, and make allocating swap
> > pages faster. And we want to cluster related swap pages anyway so
> > an extent based system is a natural fit.
>
> Much of this goes away if you get rid of both the swap and anonymous page
> special cases. Back anonymous pages with the "whoops everything I write here
> vanishes mysteriously" file system and swap with a swapfs

What exactly is anonymous memory? I thought it is what you do when you
want to malloc(), but you want to back that up by swap, not /dev/null.

Pavel
--
I'm pavel@ucw.cz. "In my country we have almost anarchy and I don't care."
Panos Katsaloulis describing me w.r.t. patents at discuss@linmodems.org