On Fri, 2019-02-08 at 17:55 +0100, Toke Høiland-Jørgensen wrote: > Saeed Mahameed <sae...@mellanox.com> 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? >
example: ethtool -L to reduce/increase the number of rings e.g. @mlx5e_ethtool_set_ringparam or virtually anywhere mlx5e_switch_priv_channels is called when xdp prog redirect is attached to mlx5. > -Toke
