From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by dpdk.org (Postfix) with ESMTP id 9EDC42B9F for ; Wed, 3 May 2017 07:54:17 +0200 (CEST) Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 02 May 2017 22:54:16 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.38,283,1491289200"; d="scan'208";a="96584647" Received: from dpdk26.sh.intel.com ([10.239.128.228]) by fmsmga005.fm.intel.com with ESMTP; 02 May 2017 22:54:15 -0700 From: Wenzhuo Lu To: dev@dpdk.org Cc: john.mcnamara@intel.com, Wenzhuo Lu Date: Wed, 3 May 2017 13:54:42 +0800 Message-Id: <1493790882-7009-1-git-send-email-wenzhuo.lu@intel.com> X-Mailer: git-send-email 1.9.3 Subject: [dpdk-dev] [PATCH] doc: update ixgbe doc X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 03 May 2017 05:54:19 -0000 Add more explanation about how to disable MDD on kernel PF. Signed-off-by: Wenzhuo Lu --- doc/guides/nics/ixgbe.rst | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/doc/guides/nics/ixgbe.rst b/doc/guides/nics/ixgbe.rst index 130765b..6773fe5 100644 --- a/doc/guides/nics/ixgbe.rst +++ b/doc/guides/nics/ixgbe.rst @@ -186,9 +186,12 @@ the advanced context descriptor should be set and set it. And DPDK has to ask the info about the header length from the upper layer, because parsing the packet itself is not acceptable. So, it's too expensive to support MDD. When using kernel PF + DPDK VF on x550, please make sure using the kernel -driver that disables MDD or can disable MDD. (Some kernel driver can use -this CLI 'insmod ixgbe.ko MDD=0,0' to disable MDD. Some kernel driver disables -it by default.) +PF driver that disables MDD or can disable MDD. +Some kernel driver already disables MDD by default. +Some kernel driver can use this CLI "insmod ixgbe.ko MDD=0,0" to disable MDD. +Every "0" in the CLI means a port. Users need to add more "0"s if the machine +has more ports. For example, if there're 6 ixgbe ports, the CLI should be +changed to "insmod ixgbe.ko MDD=0,0,0,0,0,0". Statistics -- 1.9.3