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[209.132.180.67]) by mx.google.com with ESMTP id w67si27359232pfb.125.2019.05.28.08.47.40; Tue, 28 May 2019 08:48:11 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727038AbfE1Pmh (ORCPT + 99 others); Tue, 28 May 2019 11:42:37 -0400 Received: from mx3.molgen.mpg.de ([141.14.17.11]:45283 "EHLO mx1.molgen.mpg.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726650AbfE1Pmg (ORCPT ); Tue, 28 May 2019 11:42:36 -0400 Received: from rabammel.molgen.mpg.de (rabammel.molgen.mpg.de [141.14.30.220]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: pmenzel) by mx.molgen.mpg.de (Postfix) with ESMTPSA id 8D4182000C102; Tue, 28 May 2019 17:42:32 +0200 (CEST) From: Paul Menzel Subject: Driver has suspect GRO implementation, TCP performance may be compromised. To: Jeff Kirsher Cc: intel-wired-lan@lists.osuosl.org, Eric Dumazet , netdev@vger.kernel.org, Linux Kernel Mailing List Message-ID: Date: Tue, 28 May 2019 17:42:32 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="------------ms000804090409050600010606" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is a cryptographically signed message in MIME format. --------------ms000804090409050600010606 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable Dear Linux folks, Occasionally, Linux outputs the message below on the workstation Dell OptiPlex 5040 MT. TCP: net00: Driver has suspect GRO implementation, TCP performance ma= y be compromised. Linux 4.14.55 and Linux 5.2-rc2 show the message, and the WWW also gives some hits [1][2]. ``` $ sudo ethtool -i net00 driver: e1000e version: 3.2.6-k firmware-version: 0.8-4 expansion-rom-version:=20 bus-info: 0000:00:1f.6 supports-statistics: yes supports-test: yes supports-eeprom-access: yes supports-register-dump: yes supports-priv-flags: no ``` Can the driver e1000e be improved? Any idea, what triggers this, as I do not see it every boot? Download of big files? Kind regards, Paul [1]: https://access.redhat.com/solutions/3152971 "Why following error "TCP: ensX: Driver has suspect GRO implementati= on, TCP performance may be compromised" are seen in system log file ?" [2]: https://patchwork.ozlabs.org/patch/723007/ --------------ms000804090409050600010606 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgEFADCABgkqhkiG9w0BBwEAAKCC EFowggUSMIID+qADAgECAgkA4wvV+K8l2YEwDQYJKoZIhvcNAQELBQAwgYIxCzAJBgNVBAYT AkRFMSswKQYDVQQKDCJULVN5c3RlbXMgRW50ZXJwcmlzZSBTZXJ2aWNlcyBHbWJIMR8wHQYD VQQLDBZULVN5c3RlbXMgVHJ1c3QgQ2VudGVyMSUwIwYDVQQDDBxULVRlbGVTZWMgR2xvYmFs Um9vdCBDbGFzcyAyMB4XDTE2MDIyMjEzMzgyMloXDTMxMDIyMjIzNTk1OVowgZUxCzAJBgNV BAYTAkRFMUUwQwYDVQQKEzxWZXJlaW4genVyIEZvZXJkZXJ1bmcgZWluZXMgRGV1dHNjaGVu IEZvcnNjaHVuZ3NuZXR6ZXMgZS4gVi4xEDAOBgNVBAsTB0RGTi1QS0kxLTArBgNVBAMTJERG Ti1WZXJlaW4gQ2VydGlmaWNhdGlvbiBBdXRob3JpdHkgMjCCASIwDQYJKoZIhvcNAQEBBQAD ggEPADCCAQoCggEBAMtg1/9moUHN0vqHl4pzq5lN6mc5WqFggEcVToyVsuXPztNXS43O+FZs 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