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Tue, 06 May 2025 22:32:01 -0700 (PDT) Received: from [127.0.0.1] ([104.28.205.247]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-74058d7a3a6sm10142958b3a.2.2025.05.06.22.31.59 (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Tue, 06 May 2025 22:32:01 -0700 (PDT) Message-ID: Date: Tue, 6 May 2025 22:31:59 -0700 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird To: Michal Kubiak , intel-wired-lan@lists.osuosl.org Cc: maciej.fijalkowski@intel.com, aleksander.lobakin@intel.com, przemyslaw.kitszel@intel.com, dawid.osuchowski@linux.intel.com, jacob.e.keller@intel.com, netdev@vger.kernel.org, kernel-team@cloudflare.com References: <20250422153659.284868-1-michal.kubiak@intel.com> Content-Language: en-US From: Jesse Brandeburg In-Reply-To: <20250422153659.284868-1-michal.kubiak@intel.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cloudflare.com; s=google09082023; t=1746595932; x=1747200732; darn=lists.osuosl.org; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=rXHN6Gnj9+P3ptMzbsSFbhupeu9xKqhyrBaUp2v4ioo=; b=LkUCkABLQJ9GGyAxtpnhJefAeWJFTgKaeiky4ij2baxHKqY1bh4j7RQT/fkvNWj+fZ Fmt4CPXHIGViuUN8RLRyBTlyikFdwVrfH8npVggPJT+d2Tbpboa7K6DgjdflhffvThFs df74e98fZc5HCaYLjhCjZZcWiJzsIKMU+ctLHzSwX+/t2Dtzfn8nSV/+PPl96eNH2FLF 9oqFJpggtKkELgQtUmvKfXYqsIpaRaCcAr1F5Lqmxk1CA0rbOHc+IFrNBJjdNAd7ZdJC t7SF3061iacGahHfsR1ksc79qCr2JQOpc8Yjc/JK6KSWhrbuauJUnHpL4G2BoPzRZfn/ raNA== X-Mailman-Original-Authentication-Results: smtp3.osuosl.org; dmarc=pass (p=reject dis=none) header.from=cloudflare.com X-Mailman-Original-Authentication-Results: smtp3.osuosl.org; dkim=pass (2048-bit key, unprotected) header.d=cloudflare.com header.i=@cloudflare.com header.a=rsa-sha256 header.s=google09082023 header.b=LkUCkABL Subject: Re: [Intel-wired-lan] [PATCH iwl-net 0/3] Fix XDP loading on machines with many CPUs X-BeenThere: intel-wired-lan@osuosl.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Intel Wired Ethernet Linux Kernel Driver Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-wired-lan-bounces@osuosl.org Sender: "Intel-wired-lan" On 4/22/25 8:36 AM, Michal Kubiak wrote: > Hi, > > Some of our customers have reported a crash problem when trying to load > the XDP program on machines with a large number of CPU cores. After > extensive debugging, it became clear that the root cause of the problem > lies in the Tx scheduler implementation, which does not seem to be able > to handle the creation of a large number of Tx queues (even though this > number does not exceed the number of available queues reported by the > FW). > This series addresses this problem. Hi Michal, Unfortunately this version of the series seems to reintroduce the original problem error: -22. I double checked the patches, they looked like they were applied in our test version 2025.5.8 build which contained a 6.12.26 kernel with this series applied (all 3) Our setup is saying max 252 combined queues, but running 384 CPUs by default, loads an XDP program, then reduces the number of queues using ethtool, to 192. After that we get the error -22 and link is down. Sorry to bring some bad news, and I know it took a while, it is a bit of a process to test this in our lab. The original version you had sent us was working fine when we tested it, so the problem seems to be between those two versions. I suppose it could be possible (but unlikely because I used git to apply the patches) that there was something wrong with the source code, but I sincerely doubt it as the patches had applied cleanly. We are only able to test 6.12.y or 6.6.y stable variants of the kernel if you want to make a test version of a fixed series for us to try. Thanks, Jesse some dmesg follows: sudo dmesg | grep -E "ice 0000:c1:00.0|ice:" [  20.932638] ice: Intel(R) Ethernet Connection E800 Series Linux Driver [  20.932642] ice: Copyright (c) 2018, Intel Corporation. [  21.259332] ice 0000:c1:00.0: DDP package does not support Tx scheduling layers switching feature - please update to the latest DDP package and try again [  21.552597] ice 0000:c1:00.0: The DDP package was successfully loaded: ICE COMMS Package version 1.3.51.0 [  21.610275] ice 0000:c1:00.0: 252.048 Gb/s available PCIe bandwidth (16.0 GT/s PCIe x16 link) [  21.623960] ice 0000:c1:00.0: RDMA is not supported on this device [  21.672421] ice 0000:c1:00.0: DCB is enabled in the hardware, max number of TCs supported on this port are 8 [  21.705729] ice 0000:c1:00.0: FW LLDP is disabled, DCBx/LLDP in SW mode. [  21.722873] ice 0000:c1:00.0: Commit DCB Configuration to the hardware [  22.086346] ice 0000:c1:00.1: DDP package already present on device: ICE COMMS Package version 1.3.51.0 [  22.289956] ice 0000:c1:00.0 ext0: renamed from eth0 [  23.137538] ice 0000:c1:00.0 ext0: NIC Link is up 25 Gbps Full Duplex, Requested FEC: RS-FEC, Negotiated FEC: NONE, Autoneg Advertised: On, Autoneg Negotiated: False, Flow Control: None *[ 499.643936] ice 0000:c1:00.0: Failed to set LAN Tx queue context, error: -22* * * From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f169.google.com (mail-oi1-f169.google.com [209.85.167.169]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 68E3F139E for ; Wed, 7 May 2025 05:32:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.169 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746595935; 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Tue, 06 May 2025 22:32:01 -0700 (PDT) Received: from [127.0.0.1] ([104.28.205.247]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-74058d7a3a6sm10142958b3a.2.2025.05.06.22.31.59 (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Tue, 06 May 2025 22:32:01 -0700 (PDT) Message-ID: Date: Tue, 6 May 2025 22:31:59 -0700 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH iwl-net 0/3] Fix XDP loading on machines with many CPUs To: Michal Kubiak , intel-wired-lan@lists.osuosl.org Cc: maciej.fijalkowski@intel.com, aleksander.lobakin@intel.com, przemyslaw.kitszel@intel.com, dawid.osuchowski@linux.intel.com, jacob.e.keller@intel.com, netdev@vger.kernel.org, kernel-team@cloudflare.com References: <20250422153659.284868-1-michal.kubiak@intel.com> Content-Language: en-US From: Jesse Brandeburg In-Reply-To: <20250422153659.284868-1-michal.kubiak@intel.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 4/22/25 8:36 AM, Michal Kubiak wrote: > Hi, > > Some of our customers have reported a crash problem when trying to load > the XDP program on machines with a large number of CPU cores. After > extensive debugging, it became clear that the root cause of the problem > lies in the Tx scheduler implementation, which does not seem to be able > to handle the creation of a large number of Tx queues (even though this > number does not exceed the number of available queues reported by the > FW). > This series addresses this problem. Hi Michal, Unfortunately this version of the series seems to reintroduce the original problem error: -22. I double checked the patches, they looked like they were applied in our test version 2025.5.8 build which contained a 6.12.26 kernel with this series applied (all 3) Our setup is saying max 252 combined queues, but running 384 CPUs by default, loads an XDP program, then reduces the number of queues using ethtool, to 192. After that we get the error -22 and link is down. Sorry to bring some bad news, and I know it took a while, it is a bit of a process to test this in our lab. The original version you had sent us was working fine when we tested it, so the problem seems to be between those two versions. I suppose it could be possible (but unlikely because I used git to apply the patches) that there was something wrong with the source code, but I sincerely doubt it as the patches had applied cleanly. We are only able to test 6.12.y or 6.6.y stable variants of the kernel if you want to make a test version of a fixed series for us to try. Thanks, Jesse some dmesg follows: sudo dmesg | grep -E "ice 0000:c1:00.0|ice:" [  20.932638] ice: Intel(R) Ethernet Connection E800 Series Linux Driver [  20.932642] ice: Copyright (c) 2018, Intel Corporation. [  21.259332] ice 0000:c1:00.0: DDP package does not support Tx scheduling layers switching feature - please update to the latest DDP package and try again [  21.552597] ice 0000:c1:00.0: The DDP package was successfully loaded: ICE COMMS Package version 1.3.51.0 [  21.610275] ice 0000:c1:00.0: 252.048 Gb/s available PCIe bandwidth (16.0 GT/s PCIe x16 link) [  21.623960] ice 0000:c1:00.0: RDMA is not supported on this device [  21.672421] ice 0000:c1:00.0: DCB is enabled in the hardware, max number of TCs supported on this port are 8 [  21.705729] ice 0000:c1:00.0: FW LLDP is disabled, DCBx/LLDP in SW mode. [  21.722873] ice 0000:c1:00.0: Commit DCB Configuration to the hardware [  22.086346] ice 0000:c1:00.1: DDP package already present on device: ICE COMMS Package version 1.3.51.0 [  22.289956] ice 0000:c1:00.0 ext0: renamed from eth0 [  23.137538] ice 0000:c1:00.0 ext0: NIC Link is up 25 Gbps Full Duplex, Requested FEC: RS-FEC, Negotiated FEC: NONE, Autoneg Advertised: On, Autoneg Negotiated: False, Flow Control: None *[ 499.643936] ice 0000:c1:00.0: Failed to set LAN Tx queue context, error: -22* * *