nested xen on domU?

nested xen on domU?

[Hyo J Lee]

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Hi all

I wonder if there's any way that I can do nested xen on domU not dom0.
This is what I plan.

            | dom0_T| |domU1_T| |domU2_T|
            ----------------------------- (domU1_B)
|dom0_B|    |       xen top             |
-----------------------------------------
|             xen bottom                |

And I want to be able to take the entire snapshot of domU1_B (including dom0_T, domU1_T, domU2_T)
So far, only documents I found about nested xen told me to install the xen top on dom0_B.
So I wonder if there's any way to install xen top on domU1_B or any workaround.

Thanks,
- Hyo




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Re: nested xen on domU?

[Tim Deegan]

Hi, 

At 14:10 -0400 on 04 Oct (1317737419), Hyo J Lee wrote:
> I wonder if there's any way that I can do nested xen on domU not dom0.
> This is what I plan.
> 
>             | dom0_T| |domU1_T| |domU2_T|
>             ----------------------------- (domU1_B)
> |dom0_B|    |       xen top             |
> -----------------------------------------
> |             xen bottom                |
> 

Yes, this is exactly how nested HVM is meant to work.  You should e
aware that the feature is still experimental, and performance will not
be so great (but better on AMD than on Intel).

Tim.

Re: nested xen on domU?

[AP]

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On Oct 9, 2011 9:11 AM, "Hyo J Lee" <hyo747@gmail.com> wrote:
>
> Hi all
>
> I wonder if there's any way that I can do nested xen on domU not dom0.
> This is what I plan.
>
>             | dom0_T| |domU1_T| |domU2_T|
>             ----------------------------- (domU1_B)
> |dom0_B|    |       xen top             |
> -----------------------------------------
> |             xen bottom                |
>

I tried this recently on an Intel platform and was unable to bring up
DomU1_T. The bios screen wouldn't come up. Do let me know if you have better
luck.

Thanks,
AP

> And I want to be able to take the entire snapshot of domU1_B (including
dom0_T, domU1_T, domU2_T)
> So far, only documents I found about nested xen told me to install the xen
top on dom0_B.
> So I wonder if there's any way to install xen top on domU1_B or any
workaround.
>
> Thanks,
> - Hyo
>
>
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel
>

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Re: nested xen on domU?

[Tim Deegan]

At 14:35 -0700 on 10 Oct (1318257332), AP wrote:
> On Oct 9, 2011 9:11 AM, "Hyo J Lee" <hyo747@gmail.com> wrote:
> >
> > Hi all
> >
> > I wonder if there's any way that I can do nested xen on domU not dom0.
> > This is what I plan.
> >
> >             | dom0_T| |domU1_T| |domU2_T|
> >             ----------------------------- (domU1_B)
> > |dom0_B|    |       xen top             |
> > -----------------------------------------
> > |             xen bottom                |
> >
> 
> I tried this recently on an Intel platform and was unable to bring up
> DomU1_T. The bios screen wouldn't come up. Do let me know if you have better
> luck.

ISTR that the last time I tried it I ended up using KVM as the nested
hypervisor (for other reasons).

Cc'ing the author and maintainer of the Intel nested-HVM code.

Eddie, can you help please?  Is this meant to work?

Tim.

Re: nested xen on domU?

[Tim Deegan]

At 09:12 +0100 on 11 Oct (1318324341), Tim Deegan wrote:
> At 14:35 -0700 on 10 Oct (1318257332), AP wrote:
> > On Oct 9, 2011 9:11 AM, "Hyo J Lee" <hyo747@gmail.com> wrote:
> > >
> > > Hi all
> > >
> > > I wonder if there's any way that I can do nested xen on domU not dom0.
> > > This is what I plan.
> > >
> > >             | dom0_T| |domU1_T| |domU2_T|
> > >             ----------------------------- (domU1_B)
> > > |dom0_B|    |       xen top             |
> > > -----------------------------------------
> > > |             xen bottom                |
> > >
> > 
> > I tried this recently on an Intel platform and was unable to bring up
> > DomU1_T. The bios screen wouldn't come up. Do let me know if you have better
> > luck.
> 
> ISTR that the last time I tried it I ended up using KVM as the nested
> hypervisor (for other reasons).
> 
> Cc'ing the author and maintainer of the Intel nested-HVM code.
> 
> Eddie, can you help please?  Is this meant to work?

Ping?  Eddie?  Jun?  Anyone?

Tim.