From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pavlos Parissis Subject: Instability of i40e driver on 4.9 kernel Date: Fri, 20 Oct 2017 01:02:59 +0200 Message-ID: <92118fc4-8a20-f129-193b-9c8fdf81aa24@gmail.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="WJpVl5oo2SOq6of6t5w9Qg9mnefG94DIK" Cc: Alexander Duyck To: "netdev@vger.kernel.org" , "intel-wired-lan@lists.osuosl.org" Return-path: Received: from mail-wr0-f176.google.com ([209.85.128.176]:53457 "EHLO mail-wr0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750968AbdJSXDD (ORCPT ); Thu, 19 Oct 2017 19:03:03 -0400 Received: by mail-wr0-f176.google.com with SMTP id u40so3937871wrf.10 for ; Thu, 19 Oct 2017 16:03:02 -0700 (PDT) Sender: netdev-owner@vger.kernel.org List-ID: This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --WJpVl5oo2SOq6of6t5w9Qg9mnefG94DIK Content-Type: multipart/mixed; boundary="oBvB1weDc5E2jfcUsmRXmVQqV5McCBMjM"; protected-headers="v1" From: Pavlos Parissis To: "netdev@vger.kernel.org" , "intel-wired-lan@lists.osuosl.org" Cc: Alexander Duyck Message-ID: <92118fc4-8a20-f129-193b-9c8fdf81aa24@gmail.com> Subject: Instability of i40e driver on 4.9 kernel --oBvB1weDc5E2jfcUsmRXmVQqV5McCBMjM Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable Hi all, We have been running 4.9 kernels for several months on CentOS 7.3 and for= few weeks on CentOS 7.4, and, after we replaced 10GbE cobber cards(X540-AT2 with ixgbe driver) wit= h X710 10GbE SFP cards using i40e driver, we noticed sever instabilities on our servers. On several servers the links were marked down and up again, without any o= bvious reasons expect a lot of errors on kernel.log. We run Bird Internet daemon on our servers in or= der to establish BGP peerings with routers and we have observed flapping on BGP peerings. At t= he same time we had BGP peering stabilities issues we had kernel errors. We decided to go back to= 3.10 kernel from CentOS, but that process wasn't smooth as latest firmware gave us problems with s= peed detection. We rolled back to two version old and speed detection issue was resolved. We have b= een running 3.10 several weeks without any problems. Even we want certain functionality from kerne= l 4.9, we decided to switch back to 3.10 as stability of our systems has higher priority. I need to mention that in all occurrences of the issue we didn't see any = anomalies, such DDOS attacks and etc. I have opened https://communities.intel.com/message/501682#501682 and the= re you can find all the error messages and other information. Since we noticed the issues, I have been following netdev ML and I know t= hat there are a lot of improvements/patched queued up for 4.14 and I am hoping those patches fix= our issue and most importantly are sent to linux-stable for inclusion in 4.9 kernel. Cheers, Pavlos --oBvB1weDc5E2jfcUsmRXmVQqV5McCBMjM-- --WJpVl5oo2SOq6of6t5w9Qg9mnefG94DIK Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEHZDZK6DBu+YUj6+dg/yS2h9xdrkFAlnpLyMACgkQg/yS2h9x drnQcRAAqupM6SMaj9TzGuYUZu+Eq63n+WrbOTKfNXFyzOa+WSPSHZBYu7efjI3Q 1mG1p5NJIW/2KbLIdcHpe3Y/9U7DIXDVTF2EpYVPaRn1radtoSnRyEMmbkW/ps0+ kqpiP3HVNIZ9eZInQXjT7XhXZ68+KqPHmrrk+bl3ksfYTO1YHOmsBlAYQXnleLwl byalZiQ6PhcDRL/7YveH582TVdefnInQmDFDWUC0BZErltxbj53FLH/Zk0vLvmEh 7P5kSXdH+5wONi/O6mcCZoer0IzdEAUCQ1/ojlG6HVZEyp7FeUGTQ2uU5pWezOfv /WcS4KsmFFuRakP+hA0UhN9slYv8PT3kNB3cLzubomhXMTg5f/8a2rOzI3cA4HRN iJNUrW+o6VpOxgjNzMZV3/3Z1LR03yv4cL9xqVM68v1FjM9BJsmaZa1y6jOpXE6j fhJ4puyvhYwORq2EPWUzsqW/RplF8ThLzNiAoPMjrJgZMSfDf76pTuSfvltL/Sec D79MbhA99s6IOl0AsUlOcsTejODeRw+x24aOtj94P+pc0V7P0Cc7wWwWrroqTOIE 0B653NzJxmd1OS94x8twDdchiB5lf1fQExg4bnmEgRIHJvrRlD88pdexr9HjPppq hsAdKgcXCiM/TCRniWQUkzAumoUNX1Breg00etFm91yeAFuAeVQ= =HS5P -----END PGP SIGNATURE----- --WJpVl5oo2SOq6of6t5w9Qg9mnefG94DIK--