On 25/04/2018 10:23, Tiwei Bie wrote: > There will be hardware virtio devices in the future, which > require drivers to use the barriers suitable for I/O device, > compared with software virtio devices which just require > drivers to use the barriers suitable for CPU core. > > To fix the ordering issue for hardware virtio devices, add > a new feature: VIRTIO_F_IO_BARRIER. When negotiated, driver > will use the barriers suitable for I/O device.
Unfortunately this doesn't work as mentioned earlier. Virtio live migration assumes that features are safe if you have them on the destination but not on the source; this feature however works the opposite way. Paolo --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
