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Re: Which 32 bit kernel runs better under AMD64 architure, 686 or k7?



Le mercredi 30 août 2006 13:32, Ron Johnson a écrit :
> Roberto C. Sanchez wrote:
> > On Wed, Aug 30, 2006 at 03:27:34AM -0500, Ron Johnson wrote:
> >> Roberto C. Sanchez wrote:
> >>> On Tue, Aug 29, 2006 at 11:33:14PM -0300, Marcello Di Marino
> >>> Azevedo wrote:
>
> [snip]
>
> > Correct on all counts.  However, what is the point of having an
> > amd64 CPU to then run an "inferior" kernel on it?  I was not
> > concerned with the question of compatibility, which you adressed,
> > but rather which is the "best" kernel for that CPU.
>
> 32-bit Linux is not *inferior* to 64-bit Linux.  It's *different*.
>
> OP did not tell us why they want to use a 32-bit kernel on an AMD64
>  machine.  Maybe it's because he or the PHB is nervous.  Or, the
> reason that *I* would choose to run a 32-bit kernel on an AMD64
> machine: there is some app that won't run *natively* in 64-bits
> (closed-source or poorly-written) and they don't want to use chroots.

A 64 bits kernel does not mean necessarily a 64 bits system.
I run a i386 sarge system with a em64t smp kernel (64 bits) for a Xeon HT 
processor.

You can run a k8-smp kernel with a 32 bits system.

The benefit I see is that, although an application (32 bits process) can not 
use more than 4GB of memory, the kernel can. So you can have several process 
using a total of more than 4GB of RAM.

If I'm wrong, I hope someone will correct me !

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