netdev - Re: [PATCH 0/2] Replacements for patches 2 and 7 in Big TCP series

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Date:   Mon, 9 May 2022 11:54:38 -0700
From:   Eric Dumazet <edumazet@...gle.com>
To:     Alexander Duyck <alexander.duyck@...il.com>
Cc:     David Miller <davem@...emloft.net>,
        Eric Dumazet <eric.dumazet@...il.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Coco Li <lixiaoyan@...gle.com>,
        netdev <netdev@...r.kernel.org>, Paolo Abeni <pabeni@...hat.com>
Subject: Re: [PATCH 0/2] Replacements for patches 2 and 7 in Big TCP series

On Mon, May 9, 2022 at 11:17 AM Alexander Duyck
<alexander.duyck@...il.com> wrote:
>
> This patch set is meant to replace patches 2 and 7 in the Big TCP series.
> From what I can tell it looks like they can just be dropped from the series
> and these two patches could be added to the end of the set.
>
> With these patches I have verified that both the loopback and mlx5 drivers
> are able to send and receive IPv6 jumbogram frames when configured with a
> g[sr]o_max_size value larger than 64K.
>
> Note I had to make one minor change to iproute2 to allow submitting a value
> larger than 64K in that I removed a check that was limiting gso_max_size to
> no more than 65536. In the future an alternative might be to fetch the
> IFLA_TSO_MAX_SIZE attribute if it exists and use that, and if not then use
> 65536 as the limit.

OK, thanks.

My remarks are :

1) Adding these enablers at the end of the series will not be
bisection friendly.

2) Lots more changes, and more backport conflicts for us.

I do not care really, it seems you absolutely hate the new attributes,
I can live with that,
but honestly this makes the BIG TCP patch series quite invasive.


>
> ---
>
> Alexander Duyck (2):
>       net: Allow gso_max_size to exceed 65536
>       net: Allow gro_max_size to exceed 65536
>
>
>  drivers/net/ethernet/amd/xgbe/xgbe.h            |  3 ++-
>  drivers/net/ethernet/mellanox/mlx5/core/en_rx.c |  2 +-
>  drivers/net/ethernet/sfc/ef100_nic.c            |  3 ++-
>  drivers/net/ethernet/sfc/falcon/tx.c            |  3 ++-
>  drivers/net/ethernet/sfc/tx_common.c            |  3 ++-
>  drivers/net/ethernet/synopsys/dwc-xlgmac.h      |  3 ++-
>  drivers/net/hyperv/rndis_filter.c               |  2 +-
>  drivers/scsi/fcoe/fcoe.c                        |  2 +-
>  include/linux/netdevice.h                       |  6 ++++--
>  include/net/ipv6.h                              |  2 +-
>  net/bpf/test_run.c                              |  2 +-
>  net/core/dev.c                                  |  7 ++++---
>  net/core/gro.c                                  |  8 ++++++++
>  net/core/rtnetlink.c                            | 10 +---------
>  net/core/sock.c                                 |  4 ++++
>  net/ipv4/tcp_bbr.c                              |  2 +-
>  net/ipv4/tcp_output.c                           |  2 +-
>  net/sctp/output.c                               |  3 ++-
>  18 files changed, 40 insertions(+), 27 deletions(-)
>
> --
>