[libvirt] [fedora-virt] Guest can no longer be bootet with libvirt 0.9.6 from virt-preview repo

Eric Blake eblake at redhat.com
Wed Sep 28 17:41:11 UTC 2011

[adding libvirt list]

On 09/28/2011 09:24 AM, Dennis Jacobfeuerborn wrote:
>>>>> I just noticed that once I upgrade to libvirt-0.9.6-1 from the
>>>>> virt-preview
>>>>> repo on my Fedora 15 machine I can no longer boot guests that use virtio
>>>>> disks. I only get "Boot failed: could not read the boot disk".
>>>>> Removing the disk and re-adding it as IDE drive allows KVM to boot from
>>>>> the
>>>>> disk (although the full boot obviously fails due to the hda/vda naming
>>>>> difference but that's expected).
>>>>> After downgrading to libvirt-0.8.8-7 again the problem goes away and the
>>>>> guest boot fine from virtio disks.

>> Somewhere around 0.9.4 libvirt switched to use a different method to
>> indicate from which device to boot.
>> See http://libvirt.org/git/?p=libvirt.git;a=commit;h=c3068d4d2381146ed46051ad636a928edea5c602
>> I think this causes Seabios to skip using extboot.bin for booting and
>> to try to directly boot from a disk.
>> If your Seabios version is too old, it won't support booting from
>> virtio disks directly.

> The libvirt package should probably be updated to require seabios-bin>= 0.6.2.

Yes, that probably needs to happen to libvirt.spec when built for F16 
(and thus imported into F15 via virt-preview).  I'll tackle that, since 
I've been making a couple other spec file patches lately.

Eric Blake   eblake at redhat.com    +1-801-349-2682
Libvirt virtualization library http://libvirt.org

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