From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ian Campbell <ian.campbell@citrix.com>
Subject: Re: pvgrub "Error 9: Unknown boot failure" booting
 Debian Jessie kernel (Was: Re: [PATCH v5 6/9] libxc: create unmapped initrd
 in domain builder if supported)
Date: Tue, 1 Dec 2015 08:32:58 +0000
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To: Juergen Gross <jgross@suse.com>, Wei Liu <wei.liu2@citrix.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>, stefano.stabellini@eu.citrix.com, ian.jackson@eu.citrix.com, roger.pau@citrix.com, xen-devel@lists.xen.org
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On Tue, 2015-12-01 at 08:15 +0100, Juergen Gross wrote:
> 
> BTW: up to now I haven't managed to reproduce your problem. My
> domains are just booting fine up to now. Is there a way I could
> get the domain image which is failing? Maybe I could just try
> to use that on my test machine with the same domain config you are
> using.

I think it should be sufficient just to drop the Debian kernel into an
empty filesystem attached to the guest, just doing "kernel
(hd0,0)/boot/vmlinuz ; boot" from the grub command line seems to
replicate the issue for me. Probably easier than actually going through
an installation.

I can send you the vmlinuz if you think that approach is worth trying.

Ian.