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([2620:10d:c091:500::5:59da]) by smtp.gmail.com with ESMTPSA id af79cd13be357-820ce19df73sm1094771885a.51.2025.09.17.06.00.48 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 17 Sep 2025 06:00:48 -0700 (PDT) Message-ID: <71ce45fc-5214-4d40-b8c4-abab1d44314a@gmail.com> Date: Wed, 17 Sep 2025 09:00:46 -0400 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH net V2 10/11] net/mlx5e: Update and set Xon/Xoff upon port speed set To: Tariq Toukan , Jakub Kicinski Cc: Eric Dumazet , Paolo Abeni , Andrew Lunn , "David S. Miller" , Tariq Toukan , Leon Romanovsky , Saeed Mahameed , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Gal Pressman , linux-rdma@vger.kernel.org, Alexei Lazar , Mark Bloch References: <20250825143435.598584-1-mbloch@nvidia.com> <20250825143435.598584-11-mbloch@nvidia.com> <20250910170011.70528106@kernel.org> <20250911064732.2234b9fb@kernel.org> <20250911073630.14cd6764@kernel.org> <1407e41e-2750-4594-adaf-77f8d9f8ccf7@gmail.com> Content-Language: en-US From: Daniel Zahka In-Reply-To: <1407e41e-2750-4594-adaf-77f8d9f8ccf7@gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 9/17/25 6:39 AM, Tariq Toukan wrote: > > > 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 > Hello Tariq, My notes for the situation were that I was running a vanilla net-next kernel on a dual host, CX7 system, with the 28.45.1300 FW at commit: deb105f49879 net: phy: marvell: Fix 88e1510 downshift counter errata and I was having the issues that Jakub described. No ping working in a subnet. Extremely slow bandwidth on a large transfer. My notes say that reverting just [1] (from your message) did not fix the problem, but then reverting [2] and [3] restored normal behavior. However, I did attempt to reproduce again on the same system this morning, and now I'm seeing that reverting just [1] is sufficient to fix the issues.