WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-users

Re: [Xen-users] Xen + RHEL5 + 64/32 bit

On Wednesday 06 June 2007, Steven Timm wrote:
> > You'll require Xen 3.0.5 to do 32-on-64. Other than that, the process for
> > booting a 32-bit guest is same as for a 64-bit guest.
>
> When downloading Xen 3.1.0 tarballs, (=Xen 3.0.5?!) what is
> the difference between the 32-bit and the 32-bit PAE tarballs? Which
> one would I need for the clients if I were to do 32-bit clients on 64-bit
> host?

non-PAE can only address up to 4Gig of memory.  PAE can address up to about 
16gig, useful for large memory systems.

A 32-bit PAE hypervisor only supports PAE paravirtualised guests (but it can 
run both PAE and non-PAE HVM guests if HVM is available).  A 32-bit non-PAE 
XEn can only run non-PAE guests in paravirt mode, and can run only non-PAE 
guests in HVM mode.

32-on-64 requires PAE (this is because the pagetable format for PAE is very 
closely related to that used by 64-bit x86)

> Which of the 32 bit versions (32bit PAE or without PAE) is the one
> that's in the RPM's?  I have used them before with 32 on 32 and they
> worked.

The RPMs tend to be PAE, but that's just an educated guess.

Cheers,
Mark


-- 
Dave: Just a question. What use is a unicyle with no seat?  And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users