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Re: [Qemu-devel] sending pci information over the wire


From: Anthony Liguori
Subject: Re: [Qemu-devel] sending pci information over the wire
Date: Thu, 18 Jun 2009 15:03:21 -0500
User-agent: Thunderbird 2.0.0.21 (X11/20090320)

Glauber Costa wrote:
Hi folks,

I have some trial code here for a proposal, which I'd like to hear your
opinions about (Well, I _had_, because I'm totally stupid and git reset'd --hard
the wrong location, that happened to contain part of the code for it)

Let me start by explaining what I'm trying to accomplish, and say that I myself
am not sure this is the best approach, it is just a crazy idea that poped up.

Right now, migration of pci devices work by a bit of luck. This is because the
other side of the wire can enumerate the devices in a different order, causing
them to end up at different addresses. Markus approach of pci_addr= patches
do help that fact.
However, theoretically, there can be a case in which we:
 * start receiving guest, with parameters determined by pci_addr=
 * start live migration
 * add a device.

Once we have a machine config (and please, let's avoid the 2017 jokes please), I imagine that the machine config will be transferred as a non-live section.

That will solve this problem quite nicely.

Regards,

Anthony Liguori





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