netdev - Re: [Patch net] net: invert the check of detecting hardware RX checksum fault

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Date:   Mon, 19 Nov 2018 17:47:33 -0800
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Cong Wang <xiyou.wangcong@...il.com>,
        Eric Dumazet <eric.dumazet@...il.com>
Cc:     Herbert Xu <herbert@...dor.apana.org.au>,
        Linux Kernel Network Developers <netdev@...r.kernel.org>,
        Tom Herbert <tom@...bertland.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Saeed Mahameed <saeedm@...lanox.com>
Subject: Re: [Patch net] net: invert the check of detecting hardware RX
 checksum fault



On 11/19/2018 05:42 PM, Cong Wang wrote:
> On Fri, Nov 16, 2018 at 12:15 PM Cong Wang <xiyou.wangcong@...il.com> wrote:
>>
>> On Thu, Nov 15, 2018 at 8:52 PM Eric Dumazet <eric.dumazet@...il.com> wrote:
>>>
>>> You could use trafgen to cook such a frame and confirm the theory.
>>>
>>> Something like :
>>
>> I will try it.
> 
> I just tried it, it doesn't make much difference, the warning only
> shows up once after I ran the trafgen script for many times,
> it could be triggered by other daemons running on the host too.


I guess we will need to dump the whole packet for debugging,
as suggest by Herbert :/