Hi Michael, While verifying virtio frontend drivers of guest OS on qemu with vhost-vdpa backend, we came across feature bits VIRTIO_F_IN_ORDER and VIRTIO_F_NOTIFICATION_DATA, which are introduced in virtio 1.1 spec, are not yet enabled in qemu. These feature flags are very much useful for achieving better virtio-net performance and most of the latest hardware VDPA devices supports these feature flags as per of virtio spec. Could you let us know if there are any plans, to add support for these features in upcoming qemu releases. I guess there was some discussion on VIRTIO_F_IN_ORDER feature bit long ago, https://patchew.org/QEMU/1533833677-27512-1-git-send-email-i.maxim...@samsung.com/ Seems like that discussion has not reached any conclusion or further work.
Thanks, Srujana.
