Hello Jason, On Mon, 11 Nov 2024 at 07:08, Jason Wang <jasow...@redhat.com> wrote: > > While starting a vhost device, updating iotlb entries > > via 'vhost_device_iotlb_miss' may return an error. > > > > qemu-kvm: vhost_device_iotlb_miss: > > 700871,700871: Fail to update device iotlb > > Actually, such updating is a workaround for vhost-net kernel to run. > I wonder what kind of issue would we get if we don't do this?
* During Postcopy migration, while starting the 'vhost-user' device, update of its iotlb entries would fail and the guest on the destination would hang, not finishing the migration. There might be other such scenarios. Thank you. --- - Prasad
