[PATCH v4] doc: add iavf live migration guide

[Thomas Monjalon]

Hello,

I don't pull this patch in -rc3 because I feel some improvements should be done.


> On 7/7/2023 2:08 PM, Lingyu Liu wrote:
> > +        echo 2 > /sys/bus/pci/devices/0000:ca:00.1/sriov_numvfs
> > +        echo "8086 1889" > /sys/bus/pci/drivers/ice-vfio-pci/new_id
> > +        echo 0000:ca:11.0 > /sys/bus/pci/devices/0000:ca:11.0/driver/unbind
> > +        echo 0000:ca:11.0 > /sys/bus/pci/drivers/ice-vfio-pci/bind
> > +        echo 0000:ca:11.1 > /sys/bus/pci/devices/0000:ca:11.1/driver/unbind
> > +        echo 0000:ca:11.1 > /sys/bus/pci/drivers/ice-vfio-pci/bind

Why not using dpdk-devbind.py?

> > +
> > +    .. note::
> > +
> > +        The command above creates two vfs for device 0000:ca:00.1:

vfs should be VFs

> > +
> > +    .. code-block:: console
> > +
> > +        0000:ca:11.0 'Ethernet Adaptive Virtual Function 1889' if= drv=ice-vfio-pci unused=iavf
> > +        0000:ca:11.1 'Ethernet Adaptive Virtual Function 1889' if= drv=ice-vfio-pci unused=iavf
> > +
> > +#.  Now, start the migration source Virtual Machine by running the following command:
> > +
> > +    .. code-block:: console
> > +
> > +        qemu/build/x86_64-softmmu/qemu-system-x86_64 -enable-kvm -cpu host -m 4G -smp 1 -device vfio-pci,host=0000:ca:11.0,x-enable-migration=true,x-pre-copy-dirty-page-tracking=off -drive file=ubuntu-2004.qcow2 -nic user,hostfwd=tcp::5555-:22 -monitor stdio

No need the full qemu command with your local details here.


> > --- a/doc/guides/rel_notes/release_23_07.rst
> > +++ b/doc/guides/rel_notes/release_23_07.rst
> > @@ -200,6 +200,9 @@ New Features
> >   
> >     Enhanced the GRO library to support TCP packets over IPv6 network.
> >   
> > +* **Updated Intel iavf driver.**
> > +
> > +  Added the document for iavf driver live migration based on KVM vfio migration.

Not sure about the importance of this note.