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Re: [Qemu-devel] Unable to migrate pc-i440fx-2.4 KVM guest from QEMU 2.5
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From: |
Paolo Bonzini |
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Subject: |
Re: [Qemu-devel] Unable to migrate pc-i440fx-2.4 KVM guest from QEMU 2.5.0 to QEMU 2.4.1 |
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Date: |
Thu, 18 Feb 2016 19:24:22 +0100 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.5.0 |
On 18/02/2016 18:54, Alexandre DERUMIER wrote:
> Hi,
>
> I (and promox users) have same problem than this bugreport
>
> https://bugs.launchpad.net/qemu/+bug/1536487
> https://forum.proxmox.com/threads/cant-live-migrate-after-dist-upgrade.26097/
>
> Migrating from qemu 2.5 with pc-i440fx-2.4 to qemu 2.4.1 don't work.
> qemu-system-x86_64: error while loading state for instance 0x0 of device
> 'fw_cfg'
While I agree that this is a bug worth fixing, note that in general
migration from new to old versions is _not_ supported. Usually it
works, but not always, and sometimes it's not a bug.
Machine types are only meant to support migration from old versions to new.
Paolo