Re: [Bug 1925496] Re: nvme disk cannot be hotplugged after removal

[Klaus Jensen]

On Apr 28 09:31, Oguz Bektas wrote:
> > My understanding is that this is the expected behavior. The reason is
> > that the drive cannot be deleted immediately when the device is
> > hot-unplugged, since it might not be safe (other parts of QEMU could
> > be using it, like background block jobs).
> >
> > On the other hand, the fact that if the drive is removed explicitly
> > through QMP (or in the monitor with drive_del), the drive id is
> > remains "in use". This might be a completely different bug that is
> > unrelated to the nvme device.
>
> using the same commands I can hot-plug and hot-unplug a scsi disk like
> this without issue - this behavior only appeared on nvme devices.

Kevin, Max, can you shed any light on this?

Specifically what the expected behavior is wrt. to the drive when 
unplugging a device that has one attached?

If the scsi disk is capable of "cleaning up" immediately, then I suppose 
that some steps are missing in the nvme unrealization.

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