RE: [Xen-devel] question on PV pass-through patch

["Masroor Vettuparambil" <Masroor.Vettuparambil@xxxxxxxxxxxx>]

I tried your patch with CONFIG_XEN_PCIDEV_BACKEND_VPCI.
Detached the pci on the source and attached another slot to migrated
domU on destination. 
Migration is happening smoothly. thanks for your work.

a minor thing I noticed is, dmesg on domU shows the following warning
during pci-detach,
WARNING: g.e. still in use!
WARNING: leaking g.e. and page still in use!

I wonder if we can achieve a 'live' migration of direct access, ie,
without interrupting the network traffic?
Something like creating a vif(network-attach) on domU for carrying the
n/w traffic temporarily till the migration is over.
After migration, move the n/w traffic back from vif to newly
pci-attached NIC on the destination.
Any thought?

regards,
Masroor

-----Original Message-----
From: Yosuke Iwamatsu [mailto:y-iwamatsu@xxxxxxxxxxxxx] 
Sent: Monday, March 10, 2008 7:07 AM
To: Masroor Vettuparambil
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-devel] question on PV pass-through patch

Hi,

Masroor Vettuparambil wrote:
> I could see some patches are submitted to support PV domain 
> pass-through hotplug.
> So my question is, if we pci-detach all pci devices from domU, then 
> can we able to migrate such a domain?

Yes, we can.
And I think it is one of the important features of pci pass-throughn
hotplug.

Regards,
-------------------
Yosuke Iwamatsu
         NEC Corporation




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