netdev - Re: [RFC PATCH net-next] net/smc: Introduce SMC-related proc files

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Date: Fri, 15 Sep 2023 09:58:57 +0800
From: Wen Gu <guwen@...ux.alibaba.com>
To: Alexandra Winter <wintera@...ux.ibm.com>,
 Wenjia Zhang <wenjia@...ux.ibm.com>, kgraul@...ux.ibm.com,
 jaka@...ux.ibm.com, davem@...emloft.net, edumazet@...gle.com,
 kuba@...nel.org, pabeni@...hat.com
Cc: alibuda@...ux.alibaba.com, tonylu@...ux.alibaba.com,
 linux-s390@...r.kernel.org, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH net-next] net/smc: Introduce SMC-related proc files



On 2023/9/14 18:29, Alexandra Winter wrote:
> 
> 
> On 13.09.23 11:53, Wen Gu wrote:
>>
>>
>> On 2023/9/11 19:54, Wenjia Zhang wrote:
>>>
>>>
>>>
>>> Hi Wen,
>>>
>>> I can understand your problem and frustration. However, there are two reasons I'm not really convinced by the proc file method:
>>> 1) AFAI, the proc method could consume many CPU time especially in case with a log of sockets to read the pseudo files.
>>> 2) We have already implemented the complex netlink method on the same purpose. I see the double expense to main the code.
>>>
>>> Then the question is if the lack of dependency issue can be handle somehow, or the proc method is the only way to achieve this purpose?
>>>
>>> Any opinion is welcome!
>>>
>>> Thanks,
>>> Wenjia
>>
>> Hi, Wenjia. I agree with your concerns.
>>
>> My initial intention is to make these proc files serve as a supplement to netlink to conveniently
>> check smc connections in an environment where smc-tools cannot be easily obtained.
>>
>> Yes, proc files won't be the first choice for diagnosis, but can be a convenient backup.
>>
>> Thanks,
>> Wen Gu
>>
>>
> As /proc is an interface to userface,  we would have to maintain the 2 redundant methods basically forever.
> I personally don't think we should implement another interface without a very strong reason.


I understand, thank you Alexandra and Wenjia.

Regards,
Wen Gu