From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thomas Monjalon <thomas@monjalon.net>
Subject: Re: [PATCH v3 2/4] ethdev: free all common data when
	releasing port
Date: Wed, 17 Oct 2018 10:22:34 +0200
Message-ID: <17711677.o5lTiYJ96P@xps>
References: <20180907233929.21950-1-thomas@monjalon.net>
 <20181017015450.15783-3-thomas@monjalon.net>
 <7fcb80d5-7abd-3034-f271-bb87fea72de4@solarflare.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7Bit
Cc: ferruh.yigit@intel.com, dev@dpdk.org, ophirmu@mellanox.com
To: Andrew Rybchenko <arybchenko@solarflare.com>
Return-path: <dev-bounces@dpdk.org>
Received: from out3-smtp.messagingengine.com (out3-smtp.messagingengine.com
 [66.111.4.27]) by dpdk.org (Postfix) with ESMTP id CC9C07D34
 for <dev@dpdk.org>; Wed, 17 Oct 2018 10:22:32 +0200 (CEST)
In-Reply-To: <7fcb80d5-7abd-3034-f271-bb87fea72de4@solarflare.com>
List-Id: DPDK patches and discussions <dev.dpdk.org>
List-Unsubscribe: <https://mails.dpdk.org/options/dev>,
 <mailto:dev-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://mails.dpdk.org/archives/dev/>
List-Post: <mailto:dev@dpdk.org>
List-Help: <mailto:dev-request@dpdk.org?subject=help>
List-Subscribe: <https://mails.dpdk.org/listinfo/dev>,
 <mailto:dev-request@dpdk.org?subject=subscribe>
Errors-To: dev-bounces@dpdk.org
Sender: "dev" <dev-bounces@dpdk.org>

17/10/2018 09:13, Andrew Rybchenko:
> On 10/17/18 4:54 AM, Thomas Monjalon wrote:
> > This is a clean-up of common ethdev data freeing.
> > All data freeing are moved to rte_eth_dev_release_port()
> > and done only in case of primary process.
> >
> > It is probably fixing some memory leaks for PMDs which were
> > not freeing all data.
> >
> > Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
> 
> [...]
> 
> > diff --git a/lib/librte_ethdev/rte_ethdev_driver.h b/lib/librte_ethdev/rte_ethdev_driver.h
> > index ca31b5777..a1398a80c 100644
> > --- a/lib/librte_ethdev/rte_ethdev_driver.h
> > +++ b/lib/librte_ethdev/rte_ethdev_driver.h
> > @@ -58,7 +58,16 @@ struct rte_eth_dev *rte_eth_dev_attach_secondary(const char *name);
> >   
> >   /**
> >    * @internal
> > - * Release the specified ethdev port.
> > + * Notify RTE_ETH_EVENT_DESTROY and release the specified ethdev port.
> > + *
> > + * The following data fields will be freed:
> > + *   - rx_queues
> > + *   - tx_queues
> 
> I think rx_queues and tx_queues from should not be mentioned here.
> They are managed by ethdev and there is no options here.
> 
> > + *   - mac_addrs
> > + *   - hash_mac_addrs
> > + *   - dev_private
> > + * If one of these fields should not be freed,
> > + * it must be reset to NULL by the caller.
> 
> I'm afraid nobody will find it here. Let's add
> @see rte_eth_dev_release_port()
> to these members description in rte_ethdev_core.h
> struct rte_eth_dev_data.
> 
> Also I think "by the caller" is misleading here.
> Let's highlight that it is PMD responsibility, i.e.
> "by the PMD" may be with
> "typically in dev_close method implementation".

OK, thanks for the feedback.