Re: arch/xen is a bad idea

From: William Lee Irwin III
Date: Fri Dec 17 2004 - 11:09:32 EST

On Tue, Dec 14, 2004 at 07:59:50PM +0100, Andi Kleen wrote:
> I suspect xen64 will be rather different from xen32 anyways
> because as far as I can see the tricks Xen32 uses to be
> fast (segment limits) just plain don't work on 64bit
> because the segments don't extend into 64bit space.
> So having both in one architecture may also end up messy.
> And i386 and x86-64 are in many pieces very different anyways,
> I have my doubts that trying to mesh them together in arch/xen
> will be very pretty.

I have an inkling that the xen implementors may have plots of
additional architecture ports. If it really is x86/x86-64 -only it
isn't worth bothering with a separate arch/ dir, but it would be if it
were ported to a large number of architectures.

Maybe they're modelling it after UML which has its own arch/ dir but
then grabs assorted things from other architectures; in that event I
wouldn't consider it so misguided.

Probably best if the implementors chimed in about all this.

-- wli
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at