x86-64 on i386 (was Re: Promoting i386 version over x86_64?)

[Paul Jakma]

On Wed, 18 Nov 2009, Jeff Garzik wrote:

> Running a 64-bit kernel with a 32-bit userland is a common practice 
> on non-x86 platforms, and non-Linux OS's.

FWIW, it works on Linux too. I ran F10 i386 on a x86_64 kernel for a 
while. About the only thing that doesn't work right is yum wrt kernel 
updates.

> For a lot of tasks, you simply do not need 64-bit pointers and a 
> 64-bit process address space.  Both executable code and in-memory 
> data structures tend to be smaller on 32-bit.

Indeed.

It would be nice if i386-userspace/x64-kernel were officially 
support..

regards,
-- 
Paul Jakma	paul at jakma.org	Key ID: 64A2FF6A
Fortune:
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