Re: [PATCH 6/9] clockpro-clockpro.patch

On Fri, 30 Dec 2005, Marcelo Tosatti wrote:

> I think that final objective should be to abstract it away completly,
> making it possible to select between different policies, allowing
> further experimentation and implementations such as energy efficient
> algorithms.

I'm not convinced. That might just make vmscan.c harder to read ;)

> About CLOCK-Pro itself, I think that a small document with a short
> introduction would be very useful...

http://linux-mm.org/AdvancedPageReplacement

> > The HandCold rotation is driven by page reclaim needs. HandCold in turn
> > drives HandHot, for every page HandCold promotes to hot HandHot needs to
> > degrade one hot page to cold.
>
> Why do you use only two clock hands and not three (HandHot, HandCold and
> HandTest) as in the original paper?

Because the non-resident pages cannot be in the clock.
This is both because of space overhead, and because the
non-resident list cannot be per zone.

I agree though, Peter's patch could use a lot more
documentation.

--
All Rights Reversed
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/