From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 524F1A0613 for ; Tue, 30 Jul 2019 17:22:00 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id D93481C113; Tue, 30 Jul 2019 17:21:58 +0200 (CEST) Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by dpdk.org (Postfix) with ESMTP id C6BE11BF05; Tue, 30 Jul 2019 17:21:56 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga106.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 30 Jul 2019 08:21:55 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,327,1559545200"; d="scan'208";a="162609244" Received: from fyigit-mobl.ger.corp.intel.com (HELO [10.237.221.10]) ([10.237.221.10]) by orsmga007.jf.intel.com with ESMTP; 30 Jul 2019 08:21:53 -0700 To: Matan Azrad , Wenzhuo Lu , Jingjing Wu Cc: "dev@dpdk.org" , "stable@dpdk.org" References: <1564403817-13438-1-git-send-email-matan@mellanox.com> <4d4ec2e2-0fe4-0901-76c6-28d17d80cbc8@intel.com> From: Ferruh Yigit Openpgp: preference=signencrypt Autocrypt: addr=ferruh.yigit@intel.com; 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WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Subject: Re: [dpdk-dev] [PATCH 1/2] app/testpmd: fix scatter offload configuration 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: , Errors-To: dev-bounces@dpdk.org Sender: "dev" On 7/30/2019 2:17 PM, Matan Azrad wrote: > Hi Ferruh > > From: Ferruh Yigit >> Sent: Tuesday, July 30, 2019 4:09 PM >> To: Matan Azrad ; Wenzhuo Lu >> ; Jingjing Wu >> Cc: dev@dpdk.org; stable@dpdk.org >> Subject: Re: [dpdk-dev] [PATCH 1/2] app/testpmd: fix scatter offload >> configuration >> >> On 7/29/2019 1:36 PM, Matan Azrad wrote: >>> When the mbuf data size cannot contain the maximum Rx packet length >>> with the mbuf headroom, a packet should be scattered in more than one >> mbuf. >>> >>> The application did not configure scatter offload in the above case. >>> >>> Enable the Rx scatter offload in the above case. >>> >>> Fixes: 33f9630fc23d ("app/testpmd: create mbuf based on max supported >>> segments") >>> Cc: stable@dpdk.org >>> >>> Signed-off-by: Matan Azrad >> >> Deferring the patchset to next release, they were late anyway and not >> actually fixing a defect, safer to defer than getting them in rc3. > > Yes this patch came late for RC3 but it is a fix. > > What are you concerns here? > Why don't you think defect found? First patch changes the behavior, when mbuf size is larger than configured size and user didn't provided the scatter offload, should test application automatically enable it? It may or not, but this is the change of the behavior, I think not a fix. And second patch adds more detail into the statistics, so I believe it is clear that it is not a fix. The concern is getting changes very close to release, to balance between risk and benefit of the feature. I don't see any reason why these changes can't wait next release, so I don't see any reason to get the risk. > > What's about RC4? No, it is even worse, there will be only a little testing after rc4 and a little time before release.