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Date: Tue, 07 Jul 2009 07:47:57 +0300
From: Avi Kivity <avi@redhat.com>
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Subject: Re: [Qemu-devel] Re: [PATCH 0/4] Machine config files
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To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: qemu-devel@nongnu.org, Jan Kiszka <jan.kiszka@siemens.com>, Gerd Hoffmann <kraxel@redhat.com>, Markus Armbruster <armbru@redhat.com>

On 07/06/2009 07:44 PM, Michael S. Tsirkin wrote:
>> Slight change: instead of serializing into a tree, have a qdev callback
>> which generates an add event that can be sent over the wire.  While
>> migrating, additional hotplug simply call the same callback and the
>> hotplug is migrated in real time.
>>      
>
> IOW, each device just needs to record where it is in the tree.
>    

There is no easy way to do that.  Instead, each bus records its 
component devices.

> The tree can be then reconstructed by each driver
> finding the parent bus and attaching the device to it.
>    

With a hierarhical save this is much more natural.

-- 
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.