linux-kernel - Re: [PATCH net-next v2] net/smc: align the connect behaviour with TCP

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Date:   Fri, 1 Jul 2022 14:45:20 +0200
From:   Wenjia Zhang <wenjia@...ux.ibm.com>
To:     Guangguan Wang <guangguan.wang@...ux.alibaba.com>
Cc:     davem@...emloft.net, Karsten Graul <kgraul@...ux.ibm.com>,
        liuyacan@...p.netease.com, kuba@...nel.org,
        linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org,
        netdev@...r.kernel.org, pabeni@...hat.com
Subject: Re: [PATCH net-next v2] net/smc: align the connect behaviour with TCP



On 01.07.22 04:03, Guangguan Wang wrote:
> 
> 
> On 2022/7/1 04:16, Wenjia Zhang wrote:
>>
>>
>> On 30.06.22 16:29, Guangguan Wang wrote:
>>> I'm so sorry I missed the last emails for this discussion.
>>>
>>> Yes, commit (86434744) is the trigger of the problem described in
>>> https://lore.kernel.org/linux-s390/45a19f8b-1b64-3459-c28c-aebab4fd8f1e@linux.alibaba.com/#t  .
>>>
>>> And I have tested just remove the following lines from smc_connection() can solve the above problem.
>>> if (smc->use_fallback)
>>>        goto out;
>>>
>>> I aggree that partly reverting the commit (86434744) is a better solution.
>>>
>>> Thanks,
>>> Guangguan Wang
>> Thank you for your effort!
>> Would you like to revert this patch? We'll revert the commit (86434744) partly.
> 
> Did you mean revert commit (3aba1030)?
> Sorry, I think I led to a misunderstanding. I mean commit (86434744) is the trigger of the problem I replied
> in email https://lore.kernel.org/linux-s390/45a19f8b-1b64-3459-c28c-aebab4fd8f1e@linux.alibaba.com/#t, not
> the problem that commit (3aba1030) resolved for.
> 
> So I think the final solution is to remove the following lines from smc_connection() based on the current code.
> if (smc->use_fallback) {
> 	sock->state = rc ? SS_CONNECTING : SS_CONNECTED;
> 	goto out;
> }
> 
> Thanks,
> Guangguan Wang
That would be also ok for us, thanks!