netdev - Re: [pull request][net-next 00/10] Mellanox, mlx5 and devlink updates 2018-07-31

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Date:   Thu, 02 Aug 2018 11:29:12 +0300
From:   Petr Machata <petrm@...lanox.com>
To:     David Miller <davem@...emloft.net>
Cc:     <jakub.kicinski@...ronome.com>, <saeedm@...lanox.com>,
        <netdev@...r.kernel.org>, <jiri@...lanox.com>,
        <alexander.duyck@...il.com>, <helgaas@...nel.org>
Subject: Re: [pull request][net-next 00/10] Mellanox, mlx5 and devlink updates 2018-07-31

David Miller <davem@...emloft.net> writes:

> From: Jakub Kicinski <jakub.kicinski@...ronome.com>
> Date: Wed, 1 Aug 2018 17:00:47 -0700
>
>> On Wed,  1 Aug 2018 14:52:45 -0700, Saeed Mahameed wrote:
>>> - According to the discussion outcome, we are keeping the congestion control
>>>   setting as mlx5 device specific for the current HW generation.
>> 
>> I still see queuing and marking based on queue level.  You want to add 
>> a Qdisc that will mirror your HW's behaviour to offload, if you really
>> believe this is not a subset of RED, why not...  But devlink params?
>
> I totally agree, devlink seems like absolutely to wrong level and set
> of interfaces to be doing this stuff.
>
> I will not pull these changes in and I probably should have not
> accepted the DCB changes from the other day and they were sneakily
> leading up to this crap.

Are you talking about the recent additions of DCB helpers
dcb_ieee_getapp_prio_dscp_mask_map() etc.?

If yes, I can assure there were no sneaky intentions at all. I'm at a
loss to understand the relation to mlx5 team's decision to use devlink
for congestion control configuration.

Could you please clarify your remark?

Thanks,
Petr