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Date:   Fri, 23 Sep 2022 10:39:33 +0800
From:   "huangguangbin (A)" <huangguangbin2@...wei.com>
To:     Jakub Kicinski <kuba@...nel.org>
CC:     <jiri@...lanox.com>, <moshe@...lanox.com>, <davem@...emloft.net>,
        <idosch@...dia.com>, <edumazet@...gle.com>, <pabeni@...hat.com>,
        <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <lipeng321@...wei.com>, <chenhao418@...wei.com>
Subject: Re: [PATCH net-next 2/2] net: hns3: PF add support setting parameters
 of congestion control algorithm by devlink param



On 2022/9/23 10:23, Jakub Kicinski wrote:
> On Fri, 23 Sep 2022 09:38:18 +0800 Guangbin Huang wrote:
>> Some new devices support dynamiclly configuring parameters of congestion
>> control algorithm, this patch implement it by devlink param.
>>
>> Examples of read and set command are as follows:
>>
>> $ devlink dev param set pci/0000:35:00.0 name algo_param value \
>>    "type@...cn_alp@...f@...tmp@...tkp@...ai@...maxspeed@...g@...al@...cnptime@20" \
>>    cmode runtime
>>
>> $ devlink dev param show pci/0000:35:00.0 name algo_param
>> pci/0000:35:00.0:
>>    name algo_param type driver-specific
>>      values:
>>        cmode runtime value type@...cn_ai@...f@...tkp@...tmp@...alp@...maxspeed@...g@...al@...cnptime@20
> 
> Please put your RDMA params to the RDMA subsystem.
> It's not what devlink is for. In general 95% of the time devlink params
> are not the answer upstream.
> .
> 
Ok, I will discuss with our team.

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