Re: Linux 2.4.10-pre11

Andrea Arcangeli
2001-09-18T05:59:36Z

On Tue, Sep 18, 2001 at 01:14:36AM -0300, Marcelo Tosatti wrote:
> Note that in 2.4 we scan pte's even if there is no free pages
> shortage, while in 2.2 we only scan pte's if there is a free page
> shortage.

That was most certainly a problem which is now fixed. Mainly the
preallication of swap was a waste. But I think there was a kind of
physical (not pte) overaging too that forbidden the vm to react
properly.

I believe when the storm of swap_out startups it won't matter any longer
what we aged and whatever pte scanning we did previously. At least with
the current swap_out.

Andrea