From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: <ferruh.yigit@intel.com> Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by dpdk.org (Postfix) with ESMTP id 82CA61B1C9; Mon, 21 May 2018 18:32:23 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga107.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 21 May 2018 09:32:10 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.49,426,1520924400"; d="scan'208";a="50961706" Received: from fyigit-mobl.ger.corp.intel.com (HELO [10.237.221.77]) ([10.237.221.77]) by FMSMGA003.fm.intel.com with ESMTP; 21 May 2018 09:32:08 -0700 To: Thomas Monjalon <thomas@monjalon.net>, "Yang, Zhiyong" <zhiyong.yang@intel.com> Cc: dev@dpdk.org, Matan Azrad <matan@mellanox.com>, "Iremonger, Bernard" <bernard.iremonger@intel.com>, "Yao, Lei A" <lei.a.yao@intel.com>, "maxime.coquelin@redhat.com" <maxime.coquelin@redhat.com>, "Bie, Tiwei" <tiwei.bie@intel.com>, "stable@dpdk.org" <stable@dpdk.org>, Harry Van Haaren <harry.van.haaren@intel.com> References: <20180518095937.28710-1-zhiyong.yang@intel.com> <f16bb33b-a3bc-c7ae-8b4b-ff2760e130fc@intel.com> <2140651.lW3kzKMLfn@xps> <4367922.LPtKO2KjJs@xps> From: Ferruh Yigit <ferruh.yigit@intel.com> Openpgp: preference=signencrypt Autocrypt: addr=ferruh.yigit@intel.com; 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WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 In-Reply-To: <4367922.LPtKO2KjJs@xps> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Subject: Re: [dpdk-stable] [dpdk-dev] [PATCH v2] app/testpmd: fix pmd_test_exit function for vdevs X-BeenThere: stable@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches for DPDK stable branches <stable.dpdk.org> List-Unsubscribe: <https://dpdk.org/ml/options/stable>, <mailto:stable-request@dpdk.org?subject=unsubscribe> List-Archive: <http://dpdk.org/ml/archives/stable/> List-Post: <mailto:stable@dpdk.org> List-Help: <mailto:stable-request@dpdk.org?subject=help> List-Subscribe: <https://dpdk.org/ml/listinfo/stable>, <mailto:stable-request@dpdk.org?subject=subscribe> X-List-Received-Date: Mon, 21 May 2018 16:32:24 -0000 On 5/21/2018 11:54 AM, Thomas Monjalon wrote: > 19/05/2018 16:19, Thomas Monjalon: >> 18/05/2018 18:29, Ferruh Yigit: >>> On 5/18/2018 4:55 PM, Matan Azrad wrote: >>>> Hi all >>>> >>>> While this patch also applied I don't understand it. >>>> Is it mandatory for each PMD to free all its resources in dev_close()? >>>> Or it should be done by the rte_device remove function? >>>> >>>> If the resource cleanup should be done by the remove function I think it >>>> should be called for all the devices (pci, vdev, etc). >>>> >>>> Is there an exit function for EAL to clean rte_eal_init()? If no, looks like we need it... >>> >>> Hi Matan, >>> >>> I believe there is a gap in resource cleanup. >>> dev_close() it not for resource cleanup, it should be in PMD remove() functions, >>> and PMDs have it. The problem is remove path is not called in application exit. >>> >>> As far as I know there is no simple API to clean the resources, having it may >>> help application to do the cleanup. >>> >>> I have seen the rte_eal_cleanup() API by Harry, that can be extended to cover >>> PMD resource cleanup if there is enough motivation for it. >> >> Yes, EAL resources should be removed by the function rte_eal_cleanup(). >> And ethdev ports must be removed by rte_eth_dev_close(). > > This patch is relying on rte_eth_dev_detach() to remove the EAL device. > It should be done in rte_eal_cleanup(). > > I am concerned that this patch is workarounding a miss in rte_eal_cleanup, > and takes a different action only for vdev. It is a bad example. Indeed it does workaround, but it is needed to fix a defect in virtio-user. And currently rte_eal_cleanup() is not complete, it is not doing any device related cleanup. > > And the function rte_eth_dev_detach() is fundamentally wrong and should be deprecated: > http://dpdk.org/commit/b05b444d22 > http://dpdk.org/commit/b0fb266855 > http://dpdk.org/commit/df3e8ad73f > > One more concern: it seems this patch is breaking failsafe use case. > Note: bonding is managed as an exception in rte_eth_dev_detach(). > >