netdev - Re: [RFC net-next 00/22] Introduce mb bit in xdp_buff/xdp

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Message-ID: <20200728164852.76305a12@carbon>
Date:   Tue, 28 Jul 2020 16:48:52 +0200
From:   Jesper Dangaard Brouer <brouer@...hat.com>
To:     Lorenzo Bianconi <lorenzo@...nel.org>
Cc:     netdev@...r.kernel.org, bpf@...r.kernel.org, davem@...emloft.net,
        ast@...nel.org, daniel@...earbox.net, lorenzo.bianconi@...hat.com,
        echaudro@...hat.com, sameehj@...zon.com, kuba@...nel.org,
        brouer@...hat.com
Subject: Re: [RFC net-next 00/22] Introduce mb bit in xdp_buff/xdp_frame

On Thu, 23 Jul 2020 13:42:12 +0200
Lorenzo Bianconi <lorenzo@...nel.org> wrote:

> Introduce multi-buffer bit (mb) in xdp_frame/xdp_buffer to specify
> if shared_info area has been properly initialized for non-linear
> xdp buffers.
> Initialize mb to 0 for all xdp drivers

It is nice to see that we have some many XDP drivers, but 20 separate
patches for drivers is a bit much.  Perhaps we can do all the drivers
in one patch? What do others think?

> Lorenzo Bianconi (22):
>   xdp: introduce mb in xdp_buff/xdp_frame
>   xdp: initialize xdp_buff mb bit to 0 in netif_receive_generic_xdp
>   net: virtio_net: initialize mb bit of xdp_buff to 0
>   net: xen-netfront: initialize mb bit of xdp_buff to 0
>   net: veth: initialize mb bit of xdp_buff to 0
>   net: hv_netvsc: initialize mb bit of xdp_buff to 0
>   net: bnxt: initialize mb bit in xdp_buff to 0
>   net: dpaa2: initialize mb bit in xdp_buff to 0
>   net: ti: initialize mb bit in xdp_buff to 0
>   net: nfp: initialize mb bit in xdp_buff to 0
>   net: mvpp2: initialize mb bit in xdp_buff to 0
>   net: sfc: initialize mb bit in xdp_buff to 0
>   net: qede: initialize mb bit in xdp_buff to 0
>   net: amazon: ena: initialize mb bit in xdp_buff to 0
>   net: cavium: thunder: initialize mb bit in xdp_buff to 0
>   net: socionext: initialize mb bit in xdp_buff to 0
>   net: tun: initialize mb bit in xdp_buff to 0
>   net: ixgbe: initialize mb bit in xdp_buff to 0
>   net: ice: initialize mb bit in xdp_buff to 0
>   net: i40e: initialize mb bit in xdp_buff to 0
>   net: mlx5: initialize mb bit in xdp_buff to 0
>   net: mlx4: initialize mb bit in xdp_buff to 0
>
>  drivers/net/ethernet/amazon/ena/ena_netdev.c        | 1 +
>  drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c       | 1 +
>  drivers/net/ethernet/cavium/thunder/nicvf_main.c    | 1 +
>  drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c    | 1 +
>  drivers/net/ethernet/intel/i40e/i40e_txrx.c         | 1 +
>  drivers/net/ethernet/intel/ice/ice_txrx.c           | 1 +
>  drivers/net/ethernet/intel/ixgbe/ixgbe_main.c       | 1 +
>  drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c   | 1 +
>  drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c     | 1 +

I see that mvneta is missing, but maybe it is doing another kind of
init of struct xdp_buff?

>  drivers/net/ethernet/mellanox/mlx4/en_rx.c          | 1 +
>  drivers/net/ethernet/mellanox/mlx5/core/en_rx.c     | 1 +
>  drivers/net/ethernet/netronome/nfp/nfp_net_common.c | 1 +
>  drivers/net/ethernet/qlogic/qede/qede_fp.c          | 1 +
>  drivers/net/ethernet/sfc/rx.c                       | 1 +
>  drivers/net/ethernet/socionext/netsec.c             | 1 +
>  drivers/net/ethernet/ti/cpsw.c                      | 1 +
>  drivers/net/ethernet/ti/cpsw_new.c                  | 1 +
>  drivers/net/hyperv/netvsc_bpf.c                     | 1 +
>  drivers/net/tun.c                                   | 2 ++
>  drivers/net/veth.c                                  | 1 +
>  drivers/net/virtio_net.c                            | 2 ++
>  drivers/net/xen-netfront.c                          | 1 +
>  include/net/xdp.h                                   | 8 ++++++--
>  net/core/dev.c                                      | 1 +
>  24 files changed, 31 insertions(+), 2 deletions(-)

-- 
Best regards,
  Jesper Dangaard Brouer
  MSc.CS, Principal Kernel Engineer at Red Hat
  LinkedIn: http://www.linkedin.com/in/brouer