On Sat, Oct 3, 2026 at 11:54 AM David Marchand <[email protected]> wrote:
> On Tue, 29 Sept 2026 at 12:53, Eugenio Pérez <[email protected]> wrote: > > > > This series introduces features to the VDUSE (vDPA Device in Userspace) > driver > > to support Live Migration. > > > > Currently, DPDK does not support VDUSE devices live migration because the > > driver lacks a mechanism to suspend the device and quiesce the rings to > > initiate the switchover. This series implements the suspend operation to > > address this limitation. > > > > Furthermore, enabling Live Migration for devices with control virtqueue > > requires two additional features. Both of them are included in this > series. > > > > * Address Spaces ID (ASID) support: This allows QEMU to isolate and > intercept > > the device's CVQ. By doing so, QEMU is able to migrate the device > status > > transparently, without requiring the device to support state save and > > restore. > > * QUEUE_READY: This allows QEMU to control when the dataplane virtqueues > are > > enabled. This ensures the dataplane is started after the device > > configuration has been fully restored via the CVQ. > > > > It also enables the VIRTIO_NET_F_STATUS feature. This allows the device > to > > signal the driver that it needs to send gratuitous ARP with > > VIRTIO_NET_S_ANNOUNCE, reducing the Live Migration downtime. > > > > Note that kernel headers are update to v7.3-rc3, not a stable version. > This > > would allow to ack the patches while the kernel uapi is published in 7.3. > > > > v3: > > * Include uapi/linux/stddef.h and revert the -D__counted_by from v2. > > FYI, the issue is now fixed in main. > And I just re-aligned the next-virtio branch to latest main. Thanks, Maxime > > > -- > David Marchand > >
