Not a real issue, just looking for some knowledge ...
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I have a VM that has a GPU assigned via PCIe passthrough, with its disk on an NFS SR. I understand why I can't live migrate a VM that utilizes PCIe passthrough.
But what is it that prevents migrating just the virtual disk to the local SR on the host running that VM?
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I think the XAPI logic is fairly simple: as soon you are using PCI passthrough, no migration is possible (despite same host should work). Probably a use case not taken in consideration I suppose
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@olivierlambert Fair enough. I will bring the disk for this VM onto the local SR for patching and rebooting my file server that hosts the NFS SR, just to be on the safe side.
I was hoping I could minimize the downtime by live-migrating the disk onto the host running it, but get the same error about PCI hardware as if I were trying to migrate the whole VM to another host.
But as far as you know, there is no technical reason for why it wouldn't work, like there is for live-migrating between hosts with passed-through hardware.
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I agree, I don't think it's a technical limitation, just a use case not "covered"
