From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dispatch1-us1.ppe-hosted.com (dispatch1-us1.ppe-hosted.com [148.163.129.52]) by dpdk.org (Postfix) with ESMTP id 874B51BA6E for ; Thu, 10 May 2018 12:44:21 +0200 (CEST) X-Virus-Scanned: Proofpoint Essentials engine Received: from webmail.solarflare.com (uk.solarflare.com [193.34.186.16]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1-us1.ppe-hosted.com (Proofpoint Essentials ESMTP Server) with ESMTPS id 28682100063; Thu, 10 May 2018 10:44:20 +0000 (UTC) Received: from [192.168.38.17] (84.52.114.114) by ukex01.SolarFlarecom.com (10.17.10.4) with Microsoft SMTP Server (TLS) id 15.0.1044.25; Thu, 10 May 2018 11:44:15 +0100 To: Thomas Monjalon , CC: Matan Azrad References: <20180509094337.26112-1-thomas@monjalon.net> <20180509224313.27289-1-thomas@monjalon.net> <20180509224313.27289-8-thomas@monjalon.net> From: Andrew Rybchenko Message-ID: Date: Thu, 10 May 2018 13:44:12 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 In-Reply-To: <20180509224313.27289-8-thomas@monjalon.net> Content-Type: text/plain; charset="utf-8"; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-GB X-Originating-IP: [84.52.114.114] X-ClientProxiedBy: ocex03.SolarFlarecom.com (10.20.40.36) To ukex01.SolarFlarecom.com (10.17.10.4) X-TM-AS-Product-Ver: SMEX-11.0.0.1191-8.100.1062-23834.003 X-TM-AS-Result: No--1.949700-0.000000-31 X-TM-AS-User-Approved-Sender: Yes X-TM-AS-User-Blocked-Sender: No X-MDID: 1525949060-ANgggusfknT4 Subject: Re: [dpdk-dev] [PATCH v2 07/11] ethdev: add lock to port allocation check 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: Thu, 10 May 2018 10:44:21 -0000 On 05/10/2018 01:43 AM, Thomas Monjalon wrote: > From: Matan Azrad > > When comparing the port name, there can be a race condition with > a thread allocating a new port and writing the name at the same time. > It can lead to match with a partial name by error. > > The check of the port is now considered as a critical section > protected with locks. > > This fix will be even more required for multi-process when the > port availability will rely only on the name, in a following patch. > > Fixes: 84934303a17c ("ethdev: synchronize port allocation") > Cc: stable@dpdk.org > > Signed-off-by: Matan Azrad > Acked-by: Thomas Monjalon Reviewed-by: Andrew Rybchenko