Cinder

  1. Bug #1882521
  2. Comment #9

Comment 9 for bug 1882521

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Kashyap Chamarthy (kashyapc) wrote : Re: Failing device detachments on Focal

Some notes based my understanding (and from a brief chat with libvirt/QEMU developers):

- DEVICE_DELETED is the event that QEMU sends to libvirt, *once* the device was removed by the guest, so that libvirt can clean-up. So if we see DEVICE_DELETED that means the device was successfully detached from QEMU's point of view (therefore, from the guest's PoV, too)

- The presence of the '/sys/module/pci_hotplug/' directory in the guest confirms that it is capable of handling hotplug/hotunplug events. (And Lee confirmed on IRC that the CirrOS guest _does_ have this directory)

So, if you _can_ see DEVICE_DELETED, then it sounds like the problem is somewhere _else_ than the guest OS.