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

On Mon, 25 Aug 2025 17:34:33 +0300 Mark Bloch wrote:

Xon/Xoff sizes are derived from calculations that include
the port speed.
These settings need to be updated and applied whenever the
port speed is changed.
The port speed is typically set after the physical link goes down
and is negotiated as part of the link-up process between the two
connected interfaces.
Xon/Xoff parameters being updated at the point where the new
negotiated speed is established.

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.