Re: [PATCH 4/6] Have x86_64 use add_active_range() andfree_area_init_nodes

From: Andrew Morton
Date: Sat May 20 2006 - 18:54:41 EST

Andi Kleen <ak@xxxxxxx> wrote:
> > Well, it creates arch-neutral common code, teaches various architectures
> > use it. It's the sort of thing we do all the time.
> >
> > These things are opportunities to eliminate crufty arch code which few
> > people understand and replace them with new, clean common code which lots
> > of people understand. That's not a bad thing to be doing.
> I'm not fundamentally against that, but so far it seems to just generate lots of
> new bugs? I'm not sure it's really worth the pain.

It is a bit disproportionate. But in some ways that's a commentary on the
current code. All this numa/sparse/flat/discontig/holes-in-zones/
virt-memmap/ stuff is pretty hairy, especially in its initalisation.

I'm willing to go through the pain if it ends up with something cleaner
which more people understand a little bit.
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