From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wr2-f12.google.com (mail-wr2-f12.google.com [74.125.225.76]) (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 C854B43B4A0 for ; Thu, 24 Sep 2026 21:16:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.225.76 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790284602; cv=none; b=ZzYiN+3UnDQol00tN57VM8iWW13F6ODN7fSq6KydfJUAgZmW1t1THbi1si8tmZVAYvx9P/e2ajsYLcyDj9ldbmYXyJyA+aRdOILTVQK60VZ0+0h4TpPxPyre5D/vyrScbJeo3e4Tg2wdwuBqayO/fwY4A8xTM3SLeD4FNC5Emas= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790284602; c=relaxed/simple; bh=GSpi19COajyBmeu00h0HL0wMdy2XKh2WLArdLFA54KQ=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=V0nU0xcBjPKz9VbcpW/p8yVYLM46B7cC7ta9KsGFDNp1OV52f3QeuBCGwDh2kXVyY06F68Kim7wNQKzLQ6aO3CMwXfZu/2/eFcMydV8CuJ3km8vRI90FLaZdYlH+abKETr8/K4ZY8+2wJ5dB6V623LDNBUuriZOikaQ9SSAqj1U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=a6Pp+Ngg; arc=none smtp.client-ip=74.125.225.76 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="a6Pp+Ngg" Received: by mail-wr2-f12.google.com with SMTP id ffacd0b85a97d-4843971bdd0so30833f8f.1 for ; Thu, 24 Sep 2026 14:16:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1790284595; x=1790889395; darn=vger.kernel.org; h=content-transfer-encoding:content-type:in-reply-to:autocrypt:from :content-language:references:cc:to:subject:user-agent:mime-version :date:message-id:from:to:cc:subject:date:message-id:reply-to :content-type; bh=KfGvfwNr/tckeUTW0rQax9csKD8upwKYtURB0NTilpk=; b=a6Pp+Ngguqb1Ow+2ob0ojGblJ4rb3uzRhiqmBB2FAMIP8jsC/nHzn0UqIeCIb2i1oU br1hFZ1QhozdoyGXU45NOW1asGFp/3dWmqKwXeCIVYP2T7hyi7+EcLpJ+tqNVtKuDZhP QoXv/iGQ7ziov9uM1OZ6CqLRrzdcyQBZBHrYYFyD0yowcWO/lT3fvQlgaSahBaphC/2h 4CA85hF0JVXZgv6mpA9+GqRszu6UEldvwCCHz3WYyd3FONPvnw5CXwZOLL7z/JaIaJFi kO4izjCaFNKaMCbufrhN49MelKfhCa40w0gA/XMiCIISiXgAa8bITJucqTWBVcEPxjh6 CCag== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1790284595; x=1790889395; h=content-transfer-encoding:content-type:in-reply-to:autocrypt:from :content-language:references:cc:to:subject:user-agent:mime-version :date:message-id:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=KfGvfwNr/tckeUTW0rQax9csKD8upwKYtURB0NTilpk=; b=T5ErYP6t/STr5gJEF9DRWXfrvWVQzqw2vPKVWtt772U7+DI0tOqJZvC8MfJTFQHD9w 5VsnKeDHiNKutNbJ5zICjtpYXyOIqSm6Y9PnO4Fz9NGZ3ws34gIJg4XZt4tELvblhv9o gn7CRPN9hVD+bRr2L6ROgMOw51U/AC2Hs5Pmr0T0B0A396o/6ZqpO8d8EmucpT85FNEu zIkLl0VEMzXZ0VVsGwNjcre70zjZF3kFCBUX0B0PaJ39vamQmTcJ+IcDPTQwnbm07Vto ZknLlHE6tPU2itZnVdIkyOiG/9Op2PYLdrRFqu3b4czuzmiWZVHcW58c/lYR1aWAejjV zwuA== X-Forwarded-Encrypted: i=1; AKwUvBzGPUg+VDZ4+YAsGcO9bhNwzcOWuHqCGrYOw3TilH2LFrftpo5RXVldPyLcNVXN0O9abnOTHyQj7FUjMqM=@vger.kernel.org X-Gm-Message-State: AFuF++lE1/NG21xNIcfkKGlsyIgonQqGv3B6Q//ptuY954sx3EtieW1f nP8EpetMiH+z8TxYGu/up2afcNoT1+IJ8TOS8d79SG4p7m7qYizr7MTt X-Gm-Gg: AYBFou0sgHcUqmB0ljZkIyixsQCqXVbwf3h7V1RkZ0ieY8dQcPW7GFtTiARyuGW8KNl 6PBLPyqojvg6uqS3YbX9gFKAsvavjj46ieQ/j37R2r1NFbQQwZSF/XQZ4W4d5fowZ9EY7CPxwmt hseDUpWYZTFRtpLS/UkmMpSu/+Fhqo3O4+X4E1Fd+DsuNcZ9sqmmOgrbTmYQV6z93irwL1Df4Dc 5lsk65gNNZaQYlHHceTBDv7aSM38+/S8XdP9lYvMqlGpH0NjASQCnKYO6Zg/apshL8Xai2FSEPZ x2s864LlmGh2ZZOl4Su2SaQSph9AlyP5dxf+SetTGlL1bBRciEZ7iPt7QmsjKNp1KsdfEPn9x2L TCiPe1HFL48NZtggWUEKKlVN6EnpmwE0u8j70eKmUT+RS2Zt4roncr42vpzRRgmKG/WfzUkAvsZ SwsAt6WSWJKte14b/RNY7oOV18Voojz0MCErOMT/+Ik5ReKHybwQe4zwqweNAZNW1sQGdD5msdM M0kJbLyrFZM07/0U+K8SOhJ6/ha7H1E0Yu26JFwUYtSI1FujdUueT52VPNPUwbvoQ3RlrDOKLOU KQDGZ1J6EE9R5Tb8zshmVjKJYQz8lsX58UOafSv0UexmqhuH6xTpWFk03FEhNWsa4iftaTcA2MX 2g9W1m0LaZXQ8aXN0TmBe X-Received: by 2002:a05:600c:8b4c:b0:49f:c432:885 with SMTP id 5b1f17b1804b1-49fe6702398mr60249845e9.2.1790284594803; Thu, 24 Sep 2026 14:16:34 -0700 (PDT) Received: from ?IPV6:2a02:3100:610f:ecfc:4dfb:2ac9:70ba:48bd? (dynamic-2a02-3100-610f-ecfc-4dfb-2ac9-70ba-48bd.310.pool.telefonica.de. [2a02:3100:610f:ecfc:4dfb:2ac9:70ba:48bd]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-49fe5ce4941sm92677785e9.6.2026.09.24.14.16.33 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 24 Sep 2026 14:16:34 -0700 (PDT) Message-ID: <4cd6377a-e0a5-4058-bc72-40bb32b2d26a@gmail.com> Date: Thu, 24 Sep 2026 23:16:33 +0200 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 1/4] net: hsr: fix packet drops caused by GRO superpackets To: Sebastian Andrzej Siewior Cc: Jakub Kicinski , netdev@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, davem@davemloft.net, edumazet@google.com, pabeni@redhat.com, horms@kernel.org, andrew+netdev@lunn.ch, shuah@kernel.org, kees@kernel.org, petr.wozniak@gmail.com, qingfang.deng@linux.dev, fmaurer@redhat.com, luka.gejak@linux.dev, xiaoliang.yang_1@nxp.com, skhawaja@google.com, liuhangbin@gmail.com, stable@vger.kernel.org, sdf.kernel@gmail.com References: <20260809121455.1745-1-xiexinet@gmail.com> <20260809121455.1745-2-xiexinet@gmail.com> <20260813182111.088aee3d@kernel.org> <7c09a44a-19d9-43f5-a852-12f5b6579641@gmail.com> <20260923103238.cg3tr_40@linutronix.de> Content-Language: en-GB From: Xin Xie Autocrypt: addr=xiexinet@gmail.com; keydata= xsDNBGpiHugBDADJ5KuJaOYfUx7TGbRw0UE1km4dLnJomCSNtgq2T9BqgZ6TRPEy37soAmW3 XxCPvhfL6CPLldzy6O6EkUD7/8zlbQP1DM6gUIQUyKxxkb8uR+oCogDKjsxt0QPycP/dR9fk SL4qKReprnkOOcGeLahLHzofVdn46mc5igCBsAA/PPSpo1GqsfGk+zYV97rSVa8zhnSXsqZ/ 9DbUfQynZKVqYN4tm1B30JE5SEWDCko95Qw9fAORX2W356MOQJGr05z9qMSy7CkF7bAUkziG d6ZSPsGEsel5jYByP8ZvwQ2A8kdKpRy8+zQCaC+vEotTH7Fs7SIzE/Z5mEVIi1xQqEzN1rqG BW7KgzRDWjw8lKsoBbxv20nfhUzuZLan2HzUJ+LxZ18Os4zkWg9sxHgMi+AGqn/+0ppbDcOH 9Jm072/xA7O1MCXLgr4FOP+4PJH1vcqU+0EZVz7KCjrwkdz+l5Ojso2FLXq2MGoqWGShIsDV bF1JYpgm4spdPbnISkidUC0AEQEAAc0cWGluIFhpZSA8eGlleGluZXRAZ21haWwuY29tPsLB DQQTAQgANxYhBAHOahKZFnMu2n/CxrTrSufyPi3LBQJqYh7oBQkFo5qAAhsDBAsJCAcFFQgJ CgsFFgIDAQAACgkQtOtK5/I+LctmngwAlmrGPWnWxDW6PSJeR9SM0faqwuY33TWAE35nshm/ EEkBgpVVhG4z4Cdy7L+6TG6NHVDnvl+IHLyyOZlL3LQPQIpiKVgo6jHmm9TF6mK+Vo3nsXAA uSJYu9iY9Aywmy2JVQ15ttQ0NfcoZ0sV14bT7pSr9zXB6D8p3XA4AQI6IBeLvj993Z1+tPyC 6BJ+2aWWLBx7xGpFo3X8dhjS/Lm8QoietKbI+ACefKKCDNiM2KG53P76wdXJp52u4dqP6eFc +Qv35QefnALoPkOGQEdd1qvUycyZhuaCj8h0AxDu7bL3G/IM8G2K8qsbSJuui8zCSZ9b/QZf H7u1nevPOgxyWC1Pep/TbRZ62ktn8lrmWA8PZjuaJJQGjahuK1GgTQZNG+7DB7NwjLr6aXIm JirtT4FeR+IUovvL/ll+VHzpGpFbgXz4GTsWsikQkT1huFSB8MRLlWMXdAKblL96L754j8Z5 p/YV26YTppXI56uJ3XyOwZSrfrK1pfqNIp2Yr9vUzsDNBGpiHukBDACePM1YZ1FvAiFay/2v KVDNpuazmpVb1CBFy+rqM9HcuHe+5CuxLd4RI4hb0qmjlm5Vi5M8+AuNB/wi/f8oDuhJwlMn v9L0lfgpRRdShnB26hnt2wWwWFgOU3BwymSruxhEYq+eIjjxCAo6yW7Qm+ArZ+riETMI67sy ZyLx6o4yRiWxOrh1nhwV/f6PIOl+Iv4yLAG3eFXpU7/EZpim610bKMwcXEpiRkf3NjiflIha adoKHV0LCiVNrU7r8TICjjnugpl1tXAR2RlaRcSxmvOzrXY2O/xBLpwPr5erbdk8RCaxUzS0 kK0hw+/On3Sr4Z4gtLl2xtDkjRh3KQ9ZqMPrFD/5XOs842ueNivwIyAf2kQJjKfJGWc771EM 0ZWo1r1AthbuM+IeN5QM74rMJxaf5WyDX3ZeqBA55fCJGJ3zrp7Tqeoq8DYufiNkppE9S71z Cvxva2f8mUWTlTUf8s33sRD7C87XpT0whKpn1I9/nJB9Kb0dKyRCdcsT4o1ynxUAEQEAAcLA /AQYAQgAJhYhBAHOahKZFnMu2n/CxrTrSufyPi3LBQJqYh7pBQkFo5qAAhsMAAoJELTrSufy Pi3L/iwL/3aoCeq19Pog3fqisRyEZeX8pXw2GYlrJWYoM0mQ1USaTpdsMwCXaoFMoSBqid0F VPrqlH4bSIEEAzVmFPX0NjGhREDMrQ9eR5S9yqSpBvX+hz+xgpt4NOPhbVQmV+9f4lX9TJT7 GOO3EX2eeokg6ZAISycCAx7srXuc8oyRTJtnUQziH9GXrEeon88LHf1QHg0Z0sL/c7DfDqvW 9924M4ngQAZ8RgCBGZocoWuXCemSPkfQVLt5DzycSgSQODhbNSEmr+jb1V9Svf9D9k0CQfEY cB3uwOHWb6Z/yaEARbGZPSPn89YjXBncQTpgSvUM578b5x3pKi6PjZB/hwtUsRgrWGWoIwRi +ZmcHnCzsuo6uuNYX8VvmWqYsVajykjnpjdCGmU89QUsVmrtnDPBrfr8VVJcZPnCJhE595Pk LO29Oj0au9kr7kMW5Q+fBeHj5zz6VggAaRRU74/sgtwLODBWESPZ9LqUUdB5L/XbrSq2VDlD sNySbH3veZ/55EtlXA== In-Reply-To: <20260923103238.cg3tr_40@linutronix.de> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 23/09/2026 12:32, Sebastian Andrzej Siewior wrote: > Would adding a NETIF_F_HSR_SLAVE flag to slave device(s) and then filter > invalid flags in netdev_fix_features() fix this? This should help > against enabling and add a warning if a flag can not be removed. > > A netdev_change_features() might do the job then. > > Sebastian Yes. I'll use a port constraint in netdev_fix_features() to keep GRO, and GRO_HW (when configurable) disabled, while the device is an HSR/PRP port, incl. the interlink port. And call netdev_change_features() on attachment and detachment, preserving the GRO settings. -- Xin