Re: [PATCH net V2 10/11] net/mlx5e: Update and set Xon/Xoff upon port speed set

Tariq Toukan
2025-09-17T10:39:44Z

On 15/09/2025 10:38, Tariq Toukan wrote:
>
>
> On 11/09/2025 17:36, Jakub Kicinski wrote:
>> On Thu, 11 Sep 2025 17:25:22 +0300 Mark Bloch wrote:
>>> On 11/09/2025 16:47, Jakub Kicinski wrote:
>>>> On Wed, 10 Sep 2025 17:00:11 -0700 Jakub Kicinski wrote:
>>>>> Hi, this is breaking dual host CX7 w/ 28.45.1300 (but I think most
>>>>> older FW versions, too). Looks like the host is not receiving any
>>>>> mcast (ping within a subnet doesn't work because the host receives
>>>>> no ndisc), and most traffic slows down to a trickle.
>>>>> Lost of rx_prio0_buf_discard increments.
>>>>>
>>>>> Please TAL ASAP, this change went to LTS last week.
>>>>
>>>> Any news on this? I heard that it also breaks DCB/QoS configuration
>>>> on 6.12.45 LTS.
>>>
>>> We are looking into this, once we have anything I'll update.
>>> Just to make sure, reverting this is one commit solves the
>>> issue you are seeing?
>>
>> It did for me, but Daniel (who is working on the PSP series)
>> mentioned that he had reverted all three to get net-next working:
>>
>>    net/mlx5e: Set local Xoff after FW update
>>    net/mlx5e: Update and set Xon/Xoff upon port speed set
>>    net/mlx5e: Update and set Xon/Xoff upon MTU set
>>
>
> Hi Jakub,
>
> Thanks for reporting.
> We're investigating and will update soon.
>
> Regards,
> Tariq
>

Hi,

We prefer reverting the single patch [1] for now. We'll submit a fixed
version later.

Regarding the other two patches [2], initial testing showed no issues.
Can you/Daniel share more info? What issues you see, and the repro steps.

Thanks,
Tariq

[1]
net/mlx5e: Update and set Xon/Xoff upon port speed set

[2]
net/mlx5e: Set local Xoff after FW update
net/mlx5e: Update and set Xon/Xoff upon MTU set