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

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Message-ID: <30bbcc92-f5ff-cbda-7a3b-cc801aa560ed@linux.ibm.com>
Date: Thu, 14 Sep 2023 12:29:14 +0200
From: Alexandra Winter <wintera@...ux.ibm.com>
To: Wen Gu <guwen@...ux.alibaba.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 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.