Am Tuesday 28 April 2009 18:37:01 schrieb Anthony Liguori: > Christoph Hellwig wrote: > >> Should we be > >> handling some SCSI cmds internally to QEMU (like eject operations) and > >> supporting media=cdrom in -drive for if=virtio? > >> > > > > Not quite yet. Eventually I want to support a virtio-scsi kind of > > transport which would use the same virtio-blk protocol but only send > > scsi commands. We'd need a different driver on the Linux side for > > it that registers to the scsi layer. On the QEMU side it could either > > do pass-through to a real scsi device using SG_IO or use the existing > > command scsi emulator in scsi-disk.c. > > > > Ah, excellent. I think that's a great thing to do. So do you think > virtio-scsi would deprecate virtio-blk?
There are lots of other block device drivers with strange characteristics. For example dasd/xpram disks with 4k block size or other disks with strange partitioning schemes. Doing a scsi emulation on top of these beasts looks possible but far from ideal. So I guess we will need virtio_blk for non-scsi block devices. Christian -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
