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Date: Tue, 22 Jul 2014 14:12:00 +0200
From: Paolo Bonzini <pbonzini@redhat.com>
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Subject: Re: [Qemu-devel] Live migrate,
 inconsistent machine types - new machine type to fix?
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To: Amit Shah <amit.shah@redhat.com>, Alex Bligh <alex@alex.org.uk>
Cc: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>

Il 22/07/2014 13:54, Amit Shah ha scritto:
>> > a) because I'm using qemu-kvm-1.0, not qemu-1.0. You looked at qemu-1.0
>> >    in the previous message; that's not directly relevant for what I'm
>> >    looking at as my source is qemu-kvm-1.0 (qemu vs qemu-kvm).
> Sigh; please read both my replies.
> 
> The only difference between qemu-kvm-1.0 and qemu-1.0 is the presence
> of the pci-assign section in qemu-kvm-1.0.  All other output from
> qemu-1.0 -> qemu-2.1 is equally applicable to qemu-kvm-1.0 ->
> qemu-2.1.

Not really true.

qemu 1.0 didn't have neither channels[0].irq_disabled nor flags and is
version 2.

qemu-2.1 has channels[0].irq_disabled and is version 3.

qemu-kvm-1.0 had flags, which is now called channels[0].irq_disabled,
and is version 2.

qemu-2.1 loads version 2 as something that doesn't have
channels[0].irq_disabled.  So it breaks if you feed it with qemu-kvm-1.0
data.

There's something similar going on with PIIX4_PM but I don't remember
the details.

Paolo