The dev is as expected the virtio network card
<interface type='network'>
<mac address='52:54:00:cc:a3:b7'/>
<source network='default'/>
<model type='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03'
function='0x0'/>
</interface>
There is no explicit rom specified on the guest commandlines, so they pick
their defaults.
Trying to list what they load:
$ strace -e open /usr/bin/qemu-system-x86_64 -M pc-i440fx-trusty -device
virtio-net -S -nographic -nodefaults 2>&1 | grep virtio
Shows /usr/lib/ipxe/qemu/efi-virtio.rom in both cases.
And this is actually matching the error sizes 0x4000 = 256k vs 0x8000 =
512k (next best power of 2).
I remember vague to have seen a similar issue long ago, trusty maybe even
precise.
After a while I found it - a revival of one of my most hated issues bug 1291321.
Almost tempted to downgrade ipxe in artful to do this properly and with
some time into 18.04 - but for now take some time to debug further.
** Changed in: ipxe (Ubuntu)
Status: New => Confirmed
** Changed in: qemu (Ubuntu)
Status: New => Confirmed
** Changed in: ipxe (Ubuntu)
Importance: Undecided => Critical
** Changed in: qemu (Ubuntu)
Importance: Undecided => High
** Changed in: libvirt (Ubuntu)
Status: New => Confirmed
** Changed in: libvirt (Ubuntu)
Importance: Undecided => High
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https://bugs.launchpad.net/bugs/1713490
Title:
error migrating blocked on virtio-net-pci.rom
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