Saeed Mahameed [off-list ref] writes:

But:
2) this won't totally solve our problem, since sometimes the driver can
decide to recreate (change of configuration) hw resources on the fly
while redirect/devmap is already happening, so we need some kind of a
dev_map_notification or a flag with rcu synch, for when the driver want
to make the xdp redirect resources unavailable.

Good point, I'll make a note of this. Do you have a pointer to where the
mlx5 driver does this kind of change currently?

-Toke