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Re: [Xen-users] RE: 32bit domU in 64 bit dom0


  • To: "Petersson, Mats" <Mats.Petersson@xxxxxxx>
  • From: Konstantin Skaburskas <konstantin.skaburskas@xxxxxxx>
  • Date: Fri, 11 May 2007 09:30:02 +0200
  • Cc: Omer Khalid <Omer.Khalid@xxxxxxx>, xen-users@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Fri, 11 May 2007 00:28:45 -0700
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Hi Mats,

Petersson, Mats wrote:
Hi,

We have dual CPU Quad-Core Xeons (64 bit HVM) machine. I am wondering if some one else have tried to deploy 32bit domU on 64 bit. I tried with Xen 3.0.3 but it didn't work. I remember some one mentioning on the mailing list that this functionality would be there in Xen 3.0.5.

32-bit PAE Para-virtual domains will need 3.1.0 (the version formerly
known as 3.0.5) to work correctly, yes.
HVM domains should work straight away in 3.0.3, but there may of course
be OTHER things that make this not work, if that's what you've tried.
I guess 3.0.5 would be out in few weeks, but it would be great if some one could point me to the code branch in Xen's source repository which have got this functionality implemented?

There's rc10 at the moment in
http://xenbits.xensource.com/xen-3.1-testing.hg
>
I'm not sure how long before 3.1.0 comes out, but it should be fairly
soon. If you want to use this feature, I would recommend that you get
the latest version of 3.1-testing and check it out, just in case there's
some minor bugs that can be fixed before the release!

I checked 3.1 out from the repo, compiled and can confirm that three 32 bit PV DomUs in 64 bit Dom0 survived overnight stress tests. Hosts: Dell PowerEdge 2950 with dual CPU Dual-Core Xeons 5130. Next test will be with dual CPU Quad-Core Xeons E5320 (but I think there will be no problems).

Thanks for pointing this out and great job you are doing!

Regards,
Konstantin Skaburskas

---------------------------------------------------
CERN - European Organization for Nuclear Research
IT Department. CERN CH-1211, Genève 23, Switzerland

Phone:  +41 (0) 22 76 76002
Fax: +41 (0) 22 76 74900
E-mail: Konstantin.Skaburskas@xxxxxxx
---------------------------------------------------
--
Mats
---------------------------------------------------------- CERN - European Organization for Nuclear
Research, IT Department,  CH-1211
Geneva 23, Switzerland

Phone: +41 (0) 22 767 7996
Fax:     +41 (0) 22 766 8683
E-mail : Omer.Khalid@xxxxxxx
Homepage: http://cern.ch/Omer.Khalid



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