[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=c3068d4d2381146ed46051ad... >> >> 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.

On 09/28/2011 11:43 AM, Daniel P. Berrange wrote: >>> 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. Ah, then the problem is qemu's spec file. On F16, I see this from 'yum deplist qemu-system-x86': dependency: seabios-bin provider: seabios-bin.noarch 0.6.2-2.fc16 So it is not requiring a minimal version, and when backporting qemu to F15 via virt-preview, no seabios-bin upgrade is being pulled in. I've created https://bugzilla.redhat.com/show_bug.cgi?id=741992 against qemu.

On 09/28/2011 07:56 PM, Eric Blake wrote: >On 09/28/2011 11:43 AM, Daniel P. Berrange wrote: >>>>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. > >Ah, then the problem is qemu's spec file. On F16, I see this from 'yum >deplist qemu-system-x86': > >dependency: seabios-bin >provider: seabios-bin.noarch 0.6.2-2.fc16 > >So it is not requiring a minimal version, and when backporting qemu to F15 >via virt-preview, no seabios-bin upgrade is being pulled in. I've created >https://bugzilla.redhat.com/show_bug.cgi?id=741992 against qemu. > I'm not sure if that is correct. It is purely the libvirt update that breaks things: 1. qemu 0.14.0, libvirt 0.8.8, seabios-bin 0.6.0 => virtio boots fine 2. update libvirt to 0.9.6 => virtio boot breaks 3. update seabios-bin to 0.6.2 => virtio works again Since I didn't update qemu at all any changes to its dependencies do not help in this situation.