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Date: Mon, 15 Jun 2009 12:38:48 +0300
From: Avi Kivity <avi@redhat.com>
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Subject: Re: Configuration vs. compat hints [was Re: [Qemu-devel] [PATCHv3
	03/13] qemu: add routines to manage PCI capabilities]
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To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>, kvm@vger.kernel.org, Carsten Otte <cotte@de.ibm.com>, Glauber Costa <glommer@redhat.com>, Rusty Russell <rusty@rustcorp.com.au>, qemu-devel@nongnu.org, virtualization@lists.linux-foundation.org, Blue Swirl <blauwirbel@gmail.com>, Christian Borntraeger <borntraeger@de.ibm.com>, Paul Brook <paul@codesourcery.com>

On 06/14/2009 12:47 PM, Michael S. Tsirkin wrote:
> Michael S. Tsirkin wrote:
>>> If we want to remove a device from under a running guest, you need
>>> hotplug. So we can't just remove several lines from the config and hope
>>> that it'll work simply because the PCI address is stable.
>>>
>>>        
>> Why not?
>>      
>
> E.g. configuration cycles address a specific bus/slot.
> You need cooperation from guest if you want to move
> a device.
>    

By "remove several lines from the config" I understood the guest needs 
to be restarted.  Of course if you don't restart the guest you need true 
hotplug.

-- 
error compiling committee.c: too many arguments to function