Bug#929728: systemd autopkgtest 'storage' fails adding/rmmoding scsi_debug

[Martin Pitt]

Hello,

rmmod failure due to "busy" is annoying indeed, and a bit hard to fix, thus
your approach with removing the individual hosts instead seems fine.

If the module isn't available though, I'd consider this a bad testbed.
autopkgtest's testbed VM construction scripts (VM, container, cloud) all
install the linux-image-extra bits to make sure that the module exists. If this
silently gets skipped, it could then be that this functionality just never gets
tested, so I'm not too happy about that part.

Thanks,

Martin