netdev - Re: hw csum failure + conntrack with more debugging information

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Message-ID: <f9c4b887-29ca-bf70-c48b-674616dd37af@tomt.net>
Date:   Wed, 21 Nov 2018 15:48:21 +0100
From:   Andre Tomt <andre@...t.net>
To:     Eric Dumazet <edumazet@...gle.com>
Cc:     netdev <netdev@...r.kernel.org>,
        Cong Wang <xiyou.wangcong@...il.com>
Subject: Re: hw csum failure + conntrack with more debugging information

On 18.11.2018 02:12, Eric Dumazet wrote:
> Please try this patch, we suspect mlx4 support for CHECKSUM_COMPLETE is 
> wrong.
> 
> (Only IPv4 handled, but I suspect a similar fix is needed for IPv6)

Not conclusive, but.. Have not seen any splats or other weirdness since 
applying this patch 3 days ago. Routing IPv4 only.

> root@pps:~# ethtool -S p0xe0 |grep sum
>      rx_csum_good: 530992724
>      rx_csum_none: 153315
>      rx_csum_complete: 188156
>      tx_chksum_offload: 213784665
> root@pps:~# ethtool -S p0xe1 |grep sum
>      rx_csum_good: 873708754
>      rx_csum_none: 160324
>      rx_csum_complete: 42605
>      tx_chksum_offload: 160708