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Re: [Qemu-ppc] [PATCH 1/8] spapr-iommu: add a bus for spapr-iommu device

From: Alexey Kardashevskiy
Subject: Re: [Qemu-ppc] [PATCH 1/8] spapr-iommu: add a bus for spapr-iommu devices
Date: Fri, 11 Apr 2014 01:18:49 +1000
User-agent: Mozilla/5.0 (X11; Linux i686 on x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.4.0

On 04/11/2014 12:52 AM, Andreas Färber wrote:
> Am 10.04.2014 16:40, schrieb Alexey Kardashevskiy:
>> On 04/10/2014 10:40 PM, Alexander Graf wrote:
>>> Juan, is a different command line device order supposed to work with
>>> migration?
>> We discussed this on IRC with Paolo and the conclusion is that yes, the
>> order should not matter.
> Huh?! If you ever tried changing the order of PCI devices such as
> virtio-blk-pci on the command line (or changing between if=virtio and
> -device virtio-blk-pci) then surely it does change the order of the
> /dev/vdX the guest sees and will be migration-incompatible. The order of
> -drive and -device however, for instance, does not seem to matter. But
> in this generality, your statement does not seem to reflect current reality.

As far as I can tell libvirt is trying to be precise and specifies PCI bus
name and PCI address for PCI devices.


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