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 416701B64C; Mon, 23 Oct 2017 23:36:37 +0200 (CEST) Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 23 Oct 2017 14:36:22 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.43,424,1503385200"; d="scan'208";a="1234308479" Received: from fyigit-mobl1.ger.corp.intel.com (HELO [10.241.225.136]) ([10.241.225.136]) by fmsmga002.fm.intel.com with ESMTP; 23 Oct 2017 14:36:21 -0700 To: John Daley Cc: dev@dpdk.org, stable@dpdk.org References: <20171023202300.4944-1-johndale@cisco.com> From: Ferruh Yigit Message-ID: <901823f6-5693-8f1c-0904-a007c8dbcaa2@intel.com> Date: Mon, 23 Oct 2017 14:36:21 -0700 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.4.0 MIME-Version: 1.0 In-Reply-To: <20171023202300.4944-1-johndale@cisco.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Subject: Re: [dpdk-stable] [PATCH] net/enic: fix packet loss after MTU change X-BeenThere: stable@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches for DPDK stable branches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 23 Oct 2017 21:36:39 -0000 On 10/23/2017 1:23 PM, John Daley wrote: > If multiple Rx queues and Rx Scatter are used and the MTU is > modified so that the number of mbufs per packet changes, packet > loss is possible. > > The enic completion queue index was miscalculated leaving the > upper half of the queues uninitialized after an MTU change, possibly > leading to completions on those queues not getting processed. > > Fixes: c3e09182bcd6 ("net/enic: support scatter Rx in MTU update") > Cc: stable@dpdk.org > > Signed-off-by: John Daley Applied to dpdk-next-net/master, thanks.