Re: [PATCH net v3 2/2] selftests: net: check veth carrier after changing channel counts

[Xia Yan]

Hi Hangbin,

Thanks for reproducing the issue and reviewing the driver fix.

> Why do you do gro setting in rx/tx set ups?

I included GRO off/on to cover both queue reconfiguration paths.
No XDP program is attached in these cases. With GRO on,
veth_enable_range_safe() and veth_disable_range_safe() set up or tear
down per-RX-queue NAPI instances as the RX queue count changes. With
GRO off, those helpers do not need to reconfigure NAPI.

The carrier bug reproduces in both configurations, so the test checks
the same carrier state with and without the NAPI resource changes.

Best regards,
Xia Yan