Re: [Xen-users] pvgrub: Error 9: Unknown boot failure

[Mark Pryor <tlviewer@xxxxxxxxx>]

Sven,

thanks for posting about this.

Yes it is a known bug in the pvgrub in xen 4.7, with no current fix. I've brought it up in the list too and was advised to use the pvgrub built from xen-4.6 sources. This is good advice and any domU kernel version I tried, worked.

With the pvgrub in xen-4.7, any domU kernel 4.x.x would fail as shown above.

I did an RPM package for Fedora fc24 and I introduced `pvgrub downgrade`. The normal pvgrub path is a symlink to the xen-4.6 version.

cheers,

PryMar56

On Sunday, September 25, 2016 9:10 AM, Sven Köhler <sven.koehler@xxxxxxxxx> wrote:

Hi,

I'm experiencing the bug below which was discussed on xen-devel December
last year buy Ian and Juergen. I'm using xen-pvgrub-4.7.0 on Gentoo.

The bug only seems to occur with the last domU booted on my machine.
Where do I find a patch that fixes that?

Once I find a patch to address the issue, I will also forward it to the
Gentoo maintainers via their bugzilla.


Kind Regards,
  Sven


output of xl create -c:

  Booting 'Gentoo'

root (hd0)
Filesystem type is ext2fs, using whole disk
kernel /boot/vmlinuz ro root=/dev/xvda1 rootfstype=ext4

============= Init TPM Front ================
Tpmfront:Error Unable to read device/vtpm/0/backend-id during tpmfront
initialization! error = ENOENT
Tpmfront:Info Shutting down tpmfront
pin_table(x) returned 28993

Error 9: Unknown boot failure

Press any key to continue...



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Attachment: pvgrub-downgrade.png
Description: PNG image

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