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Date: Wed, 06 Aug 2014 09:47:36 +0200
From: Paolo Bonzini <pbonzini@redhat.com>
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Subject: Re: [Qemu-devel] qemu live migration error from 2.0 to 2.1
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To: "Dr. David Alan Gilbert" <dgilbert@redhat.com>, William Dauchy <wdauchy@gmail.com>
Cc: Igor Mammedov <imammedo@redhat.com>, QEMU Developers <qemu-devel@nongnu.org>

Il 05/08/2014 20:57, Dr. David Alan Gilbert ha scritto:
> (CC Paolo)
> 
> * William Dauchy (wdauchy@gmail.com) wrote:
>> Hello,
>>
>> For a qemu live migration from 2.0 to 2.1 I'm getting:
>>
>> qemu-system-x86_64: Length mismatch: /rom@etc/acpi/tables: 3000 in != 20000
>> qemu-system-x86_64: Unknown ramblock "/table-loader", cannot accept migration
>> qemu-system-x86_64: Ack, bad migration stream!
>> qemu-system-x86_64: Illegal RAM offset f0e2d500f06000
>> qemu: warning: error while loading state for instance 0x0 of device 'ram'
>> qemu-system-x86_64: load of migration failed: Invalid argument
>>
>> I was wondering if it was a bug or if I was supposed to do something
>> to avoid this error.
> 
> That should work.
> 
>> I saw the bug report for qemu1.7 but it's not my case.
> 
> Can you confirm this is on the final 2.1 release (there was a fix that
> went in just around rc5).
> 
> What's your command line on both ends?

I suspect he's using "-M pc" on both.  You must use "-M pc-i440fx-2.0"
on both if you're migrating from 2.0 to a different version.

Paolo