[Pkg-xen-devel] Bug#737613: Debian Bug 737613: Xen not loading dom0 on Jessie - FATAL error on running /etc/init.d/xen

[Steve Hnizdur]

Hi

Thanks for that. I'm not sure exactly what I was running that was 
incorrect. I set up the system with a

apt-get install xen-system-amd64

with a source file pointing at jessie. Therefore all the xen packages 
came via this route.

What do I need to change to get 64 bit userspace? I would like to run 
64/64/64.

The documentation on line is a bit thin.

Cheers

On 24/11/14 17:41, Ian Campbell wrote:
> Control: forcemerge 503287 737613
>
> (making $subjet a bit more helpful this time too)
>
> On Mon, Nov 24, 2014 at 05:28:59PM +0000, Ian Campbell wrote:
>> Before investigating any further can either of you confirm whether
>> this still happens with the version of Xen currently in Jessie, which
>> is 4.4.1-3 (and the current kernel too). That was a major version
>> bump, so it is worth confirming.
>
> Actually nevermind this. Right after hitting send a bit more googling around
> the issue took me to http://osdir.com/ml/general/2013-09/msg42718.html which
> reminded me about https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=503287 and
> checking the original report again it appears that you are indeed running
> 32-bit userspace on a 64-kernel on a 64-bit Xen. Unfortunately that combination
> is not supported, quoting that first link:
>
>    The Xen i386 userspace tools cannot run on a 64-bit kernel+hypervisor
>    combo.
>
>    The working combinations are:
>
>    64 bit hyp, 64 bit dom0 kernel, 64 bit dom0 userspace.
>    64 bit hyp, 32 bit dom0 kernel, 32 bit dom0 userspace.
>
> The failure would be the same sort of invalid ioctl error as was observed.
>
> Sorry for not spotting this sooner. Unfortunately this is unlikely to be fixed
> within Debian (it's really an upstream thing).
>
> Now that multiarch exists I think it ought to be possible to install the 64-bit
> Xen toolstack on an otherwise 32-bit dom0 userspace, but I've not tried that
> myself.
>
> Sorry again for not figuring this out before.
>
> I'm merging this bug with the existing wishlist bug, which is tagged wontfix
> I'm afraid. It occurs to me today that /etc/init.d/xen could at least try and
> detect this situation and warn about it instead of hanging.
>
> Ian.
>

-- 

Steve Hnizdur