[libvirt] [PATCH v4 05/10] Split reprobe action from the virPCIUnbindFromStub into a new function

Andrea Bolognani abologna at redhat.com
Fri Nov 20 16:58:55 UTC 2015

On Fri, 2015-11-20 at 11:33 -0500, Laine Stump wrote:
> Seems safe, but is this really what we want to do? I haven't
> read/understood the remaining patches yet, but this makes it sound like
> what is going to happen is that all of the devices will be unbound from
> vfio-pci immediately, so they are "in limbo", and will then be reprobed
> once all devices are unused (and therefore unbound from vfio-pci).
> I think that may be a bit dangerous. Instead, we should leave the
> devices bound to vfio-pci until all of them are unused, and at that
> time, we should unbind them all from vfio-pci, then reprobe them all.
> (again, I may have misunderstood the direction, if so ignore this).

I agree, we should not unbind any device from vfio-pci until
all the devices in the IOMMU group have been detached from
the guest.


Andrea Bolognani
Software Engineer - Virtualization Team

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