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Date: Mon, 11 Jan 2016 18:46:16 +0300
From: Alexey <alukardd@alukardd.org>
Message-ID: <e6003ff74bde3882686ff92f964865c6@alukardd.org>
Subject: [Qemu-devel] live migration between different qemu versions
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To: Qemu devel <qemu-devel@nongnu.org>

Hello.

I have two servers between which I need have live migration.

First server have QEMU emulator version 2.3.0
Second server have QEMU emulator version 2.5.0

Migration command look like this:
/usr/bin/virsh migrate --live DOMAIN_NAME --migrateuri 
tcp://second.server qemu+ssh://second.server/system --verbose

I got next error on console:
error: operation failed: migration job: unexpectedly failed

And next error in log on second server:
2016-01-11T15:07:12.888647Z qemu-system-x86_64: Length too large: 
/rom@genroms/efi-virtio.rom: 0x32000 > 0x2d000: Invalid argument
2016-01-11T15:07:12.888685Z qemu-system-x86_64: error while loading 
state for instance 0x0 of device 'ram'
2016-01-11T15:07:12.889733Z qemu-system-x86_64: load of migration 
failed: Invalid argument

In my libvirt domain I have option <rom bar="off"/>.

I need to do a live migration in any possible way. How can I do this 
one?

Thanks,
Alexey Mochkin.