Re: [Xen-users] Xen interoperability among different version

[Mark Williamson <mark.williamson@xxxxxxxxxxxx>]

> My question might be pretty dumb but please bear with me :-)
> In which way are the different versions of Xen and versions of (Linux)
> kernels patched with Xen interoperable among each other?

Within each stable series (i.e. within 2.x.y)  we aim for binary 
compatibility.

> I tried Xen on a Fedora Core 4 system (kernel 2.6.11-1.1369_FC4xen0) and
> whenever I would start a domU using the official 2.0.6
> vmlinuz-2.6.11.10-xenU or vmlinuz-2.4.30-xenU kernel, I'd get:

AFAIK, the FC4 Xen comes from the -unstable development tree.  You'll need to 
use the FC4 packaged kernels or build from (the FC4 revision of the) source, 
since -unstable isn't compatible with Xen 2 anymore.

Cheers,
Mark

> Using config file "foo.conf".
> Error: Error creating domain: (0, 'Error')
>
> Here are the according entries in xm log:
> [2005-06-27 03:41:13 xend] DEBUG (XendDomainInfo:770) init_domain>
> Created domain=1 name=ttylinux memory=6144
> [2005-06-27 03:41:13 xend] INFO (console:94) Created console id=13
> domain=1 port=9601
> [2005-06-27 03:41:13 xend] WARNING (XendDomainInfo:798) building dom
> with 1 vcpus
> [2005-06-27 03:41:14 xend] ERROR (SrvBase:163) op=create: Error creating
> domain: (0, 'Error')
> Traceback (most recent call last):
>    File "/usr/lib/python2.4/site-packages/xen/xend/server/SrvBase.py",
> line 107, in _perform
>      val = op_method(op, req)
>    File
> "/usr/lib/python2.4/site-packages/xen/xend/server/SrvDomainDir.py", line
> 71, in op_create
>      raise XendError("Error creating domain: " + str(ex))
> XendError: Error creating domain: (0, 'Error')
> [2005-06-27 03:41:14 xend] INFO (XendRoot:112) EVENT>
> xend.console.create [13, 1, 9601]
>
> I tried another domU conf and got the same result with the two kernels
> from Xen Downloadpage.
>
> Did I miss anything?
>
> cheers,
>   thomas

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