From patchwork Mon Feb 17 11:37:36 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Konieczny, TomaszX" X-Patchwork-Id: 1239146 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=openvswitch.org (client-ip=140.211.166.133; helo=hemlock.osuosl.org; envelope-from=ovs-dev-bounces@openvswitch.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=intel.com Received: from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 48LhrW3nJ4z9sRL for ; Mon, 17 Feb 2020 22:40:58 +1100 (AEDT) Received: from localhost (localhost [127.0.0.1]) by hemlock.osuosl.org (Postfix) with ESMTP id DD42C87158; Mon, 17 Feb 2020 11:40:55 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from hemlock.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id UG6rvIfjevZZ; Mon, 17 Feb 2020 11:40:52 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by hemlock.osuosl.org (Postfix) with ESMTP id F3F2486CD7; Mon, 17 Feb 2020 11:40:51 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id E1283C08A0; Mon, 17 Feb 2020 11:40:51 +0000 (UTC) X-Original-To: dev@openvswitch.org Delivered-To: ovs-dev@lists.linuxfoundation.org Received: from fraxinus.osuosl.org (smtp4.osuosl.org [140.211.166.137]) by lists.linuxfoundation.org (Postfix) with ESMTP id C45BAC013E for ; Mon, 17 Feb 2020 11:40:50 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by fraxinus.osuosl.org (Postfix) with ESMTP id BBC3285535 for ; Mon, 17 Feb 2020 11:40:50 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from fraxinus.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 0y7Pf13-nHee for ; Mon, 17 Feb 2020 11:40:49 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by fraxinus.osuosl.org (Postfix) with ESMTPS id 8832E85531 for ; Mon, 17 Feb 2020 11:40:49 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 17 Feb 2020 03:40:49 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,452,1574150400"; d="scan'208";a="348483968" Received: from tkoniecx-mobl.ger.corp.intel.com ([10.103.104.52]) by fmsmga001.fm.intel.com with ESMTP; 17 Feb 2020 03:40:48 -0800 From: Tomasz Konieczny To: dev@openvswitch.org Date: Mon, 17 Feb 2020 12:37:36 +0100 Message-Id: <20200217113736.1541-1-tomaszx.konieczny@intel.com> X-Mailer: git-send-email 2.23.0.windows.1 MIME-Version: 1.0 Subject: [ovs-dev] [PATCH v2 1/1] docs: Add flow control on i40e issue X-BeenThere: ovs-dev@openvswitch.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: ovs-dev-bounces@openvswitch.org Sender: "dev" There is an issue with flow control configuration on i40e devices and it has a work around. We add this to documentation as known issue until a permanent solution is developed. Signed-off-by: Tomasz Konieczny Acked-by: Flavio Leitner --- Documentation/intro/install/dpdk.rst | 9 +++++++++ Documentation/topics/dpdk/phy.rst | 2 ++ 2 files changed, 11 insertions(+) diff --git a/Documentation/intro/install/dpdk.rst b/Documentation/intro/install/dpdk.rst index dbf88ec..be47a11 100644 --- a/Documentation/intro/install/dpdk.rst +++ b/Documentation/intro/install/dpdk.rst @@ -687,6 +687,15 @@ Limitations around is temporary and is expected to be removed once a method is provided by DPDK to query the upper bound MTU value for a given device. +- Flow Control: When using i40e devices (Intel(R) 700 Series) it is recommended + to set Link State Change detection to interrupt mode. Otherwise it has been + observed that using the default polling mode, flow control changes may not be + applied, and flow control states will not be reflected correctly. + The issue is under investigation, this is a temporary work around. + + For information about setting Link State Change detection, refer to + :ref:`lsc-detection`. + Reporting Bugs -------------- diff --git a/Documentation/topics/dpdk/phy.rst b/Documentation/topics/dpdk/phy.rst index 38e52c8..55a98e2 100644 --- a/Documentation/topics/dpdk/phy.rst +++ b/Documentation/topics/dpdk/phy.rst @@ -385,6 +385,8 @@ Jumbo Frames DPDK physical ports can be configured to use Jumbo Frames. For more information, refer to :doc:`jumbo-frames`. +.. _lsc-detection: + Link State Change (LSC) detection configuration -----------------------------------------------