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

Tariq Toukan
2025-09-15T07:38:42Z

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