Re: What to expect with the 2.6 VM

From: Andrea Arcangeli (
Date: Tue Jul 01 2003 - 22:08:18 EST

On Tue, Jul 01, 2003 at 10:46:31PM +0100, Mel Gorman wrote:
> On Tue, 1 Jul 2003, Andrea Arcangeli wrote:
> > On Tue, Jul 01, 2003 at 02:39:47AM +0100, Mel Gorman wrote:
> > > Reverse Page Table Mapping
> > > ==========================
> > >
> > > <rmap stuff snipped>
> >
> > you mention only the positive things, and never the fact that's the most
> > hurting piece of kernel code in terms of performance and smp scalability
> > until you actually have to swapout or pageout.
> >
> You're right, I was commenting only on the positive side of things. I
> didn't pay close enough attention to the development of the 2.5 series so
> right now I can only comment on whats there and only to a small extent on
> what it means or why it might be a bad thing. Here goes a more balanced
> view...

never mind, I think for your talk that was just perfect ;) Though I
think your last paragraph addition on the rmap thing is fair enough.

I only abused your very nice and detailed list of features, to comment
on some that IMHO had some drawback (and for some [not rmap] I don't
recall any discussion about their drawbacks on l-k ever, that's why I


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