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From: Anthony Liguori <aliguori@us.ibm.com>
In-Reply-To: <1379550897.23864274.1355471680686.JavaMail.root@redhat.com>
References: <1379550897.23864274.1355471680686.JavaMail.root@redhat.com>
Date: Fri, 14 Dec 2012 07:29:27 -0600
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Subject: Re: [Qemu-devel] [PATCH] define qemukvm-1.2 machine type
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To: Paolo Bonzini <pbonzini@redhat.com>, Eduardo Habkost <ehabkost@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>, qemu-devel@nongnu.org, Cole Robinson <crobinso@redhat.com>

Paolo Bonzini <pbonzini@redhat.com> writes:

>> > > > I think distros that used to ship qemu-kvm should just change
>> > > > the default just like for the acpi_piix4.c change.
>> > >
>> > > Maybe we could provide a --with-qemu-kvm-compat configure flag to
>> > > them?
>
> I like this.
>
>> > I think that defeats the purpose of a single binary.
>> > 
>> > I think it would be better for the distros to have a qemu-kvm
>> > script that was:
>> > 
>> > /usr/libexec/qemu-kvm:
>> > 
>> > #!/bin/sh
>> > 
>> > qemu-system-x86_64 -enable-qemu-kvm-compat "$@"
>> 
>> That would be even better. I proposed a configure flag because I
>> understood (maybe incorrectly) that Paolo proposed a build-time
>> default change.
>
> Yes, that's what I was thinking.  The problem is that Fedora did ship a
> qemu-system-x86_64 binary that disabled the qemu-kvm options (including
> using TCG by default), but it still had a qemu-kvm-compatible migration
> format.

Can you be more specific?  What's different in the migration format?

Regards,

Anthony Liguori

>
> Paolo