On Wed, Jul 22, 2015 at 10:31:45AM +0100, Daniel P. Berrange wrote: > On Wed, Jul 22, 2015 at 01:59:51PM +0800, Jason Wang wrote: > > SCSI passthrough was no longer supported in virtio 1.0, so this patch > > fail the get_features() when both 1.0 and scsi is set. And also only > > advertise VIRTIO_BLK_F_SCSI for legacy virtio-blk device. > > Why is SCSI passthrough support not available in virtio 1.0 ? This > will cause a regression for any users of that as & when QEMU changes > to use virtio 1.0 by default. Can we not fix this regression instead. > > Regards, > Daniel
If we wanted to, we might be able to fix this but not for 2.4: we'd have to extend the spec and guest drivers, in some way TBD. Paolo would be best placed to answer whether this feature is desirable in the future, I think the argument made when the spec was written was that the feature is not widely used, and virtio scsi is available as a replacement for people who need it. > -- > |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| > |: http://libvirt.org -o- http://virt-manager.org :| > |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| > |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :|