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



On Wed, Sep 28, 2011 at 11:41:11AM -0600, Eric Blake wrote:
> [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.

It is not a libvirt requirement really. It is QEMU that is advertising
it supports the per-device boot ordering feature. libvirt queries this
and then tries to use it. QEMU should have required the new Seabios if
it intends to advertise this feature.


Daniel
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