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

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Date:   Fri, 1 Jul 2022 10:03:16 +0800
From:   Guangguan Wang <guangguan.wang@...ux.alibaba.com>
To:     Wenjia Zhang <wenjia@...ux.ibm.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 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