On Fri, Jul 23, 2010 at 12:50:12PM +0200, Kevin Wolf wrote: > This isn't reverting to the state before we reported anything, but it > reports values of 0 now. Is this defined for both virtio-blk and SCSI to > mean the same as no report at all? Or should we rather not advertise > VIRTIO_BLK_F_TOPOLOGY (and the SCSI equivalent) in this case?
For scsi it's explicitly defined that way, and there is not equivalent to the VIRTIO_BLK_F_TOPOLOGY because it will just use the VPD data if the page is long enough. virtio is a bit underspecified, but the Linux guest driver has the same behaviour as scsi in that respect.
