Netvsc PMD : Hotplug handling : checksum offloads

[Stephen Hemminger]

On Wed, 23 Oct 2024 13:34:53 -0700
Nandini Rangaswamy <nandini.rangaswamy at broadcom.com> wrote:

> Hi Stephen,
> The code looking at checksum flags in each packet would not give us desired
> performance. Instead, should the dpdk app register callbacks for hotplug
> add and re-configure the checksum offloads when VF is added again?
> Regards,
> Nandini

The code in hn_vf_add which is where netvsc PMD handles hot add of VF
should be feeding the current offload settings to the VF.

Maybe the rte_eth_conf being passed to VF is incorrect, or
the configuration step there is failing. Probably need more instrumentation
and logs to tell.