Hi Stephen/Long,
I did some more code instrumentation and I observed that when a hotplug add event is received, the conf is applied back to VF and offloads work as expected.
I also observe that when VF is removed, the offloads still continue to work as expected. Is this because the offloads are not unset when VF is removed ?
Regards,
Nandini

On Thu, Oct 24, 2024 at 9:33 AM Stephen Hemminger <stephen@networkplumber.org> wrote:
On Wed, 23 Oct 2024 13:34:53 -0700
Nandini Rangaswamy <nandini.rangaswamy@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.

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