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From: Paul Brook <paul@codesourcery.com>
Subject: Re: [Qemu-devel] [PATCH 05/11] qemu: MSI-X support functions
Date: Wed, 10 Jun 2009 20:04:13 +0100
References: <cover.1243253205.git.mst@redhat.com>
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To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Carsten Otte <cotte@de.ibm.com>, kvm@vger.kernel.org, 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>, Avi Kivity <avi@redhat.com>

> > If we can't start a new qemu with the same hardware configuration then we
> > should not be allowing migration or loading of snapshots.
>
> OK, so I'll add an option in virtio-net to disable msi-x, and such
> an option will be added in any device with msi-x support.
> Will that address your concern?

Yes, as long as migration fails when you try to migrate to the wrong kind of 
device.

Paul