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Mon, 9 Mar 2020 09:32:12 +0000 Date: Mon, 9 Mar 2020 09:32:10 +0000 From: Quentin Deslandes To: Oscar Carter Cc: Greg Kroah-Hartman , Forest Bond , Malcolm Priestley , Gabriela Bittencourt , Colin Ian King , devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] staging: vt6656: Declare a few variables as __read_mostly Message-ID: <20200309093210.GA7693@qd-ubuntu> References: <20200301112620.7892-1-oscar.carter@gmx.com> <20200301122514.GA1461917@kroah.com> <20200301131701.GA7487@ubuntu> <20200301150913.GA1470815@kroah.com> <20200307082906.GA2948@ubuntu> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200307082906.GA2948@ubuntu> User-Agent: Mutt/1.9.4 (2018-02-28) X-ClientProxiedBy: CWLP123CA0070.GBRP123.PROD.OUTLOOK.COM (2603:10a6:401:59::34) To DBBPR08MB4491.eurprd08.prod.outlook.com (2603:10a6:10:d2::16) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from qd-ubuntu (89.21.227.133) by CWLP123CA0070.GBRP123.PROD.OUTLOOK.COM (2603:10a6:401:59::34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2793.16 via Frontend Transport; Mon, 9 Mar 2020 09:32:11 +0000 X-Originating-IP: [89.21.227.133] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 559c506b-33cb-4f69-e4eb-08d7c40cbedd X-MS-TrafficTypeDiagnostic: DBBPR08MB4506: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:8273; X-Forefront-PRVS: 0337AFFE9A X-Forefront-Antispam-Report: SFV:NSPM;SFS:(10009020)(376002)(346002)(396003)(136003)(39830400003)(366004)(199004)(189003)(86362001)(8936002)(6916009)(1076003)(508600001)(8676002)(33656002)(81166006)(81156014)(4744005)(316002)(186003)(16526019)(6496006)(52116002)(54906003)(9686003)(33716001)(4326008)(956004)(26005)(5660300002)(55016002)(2906002)(66946007)(44832011)(66476007)(66556008);DIR:OUT;SFP:1101;SCL:1;SRVR:DBBPR08MB4506;H:DBBPR08MB4491.eurprd08.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;A:1;MX:1; Received-SPF: None (protection.outlook.com: itdev.co.uk does not designate permitted sender hosts) X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: ocRmDrFFo1zxPpJ9+Dme4V8zt8HBbdUzFWvulCN120LQ0aCJMsjTJLSaKP9ucC75mFvOEkiJoYfc+rPbglsbePSdmrPWujxBgDASxGMBLyqszGXz0YHg1nAmkl2b9dCm+6B4/mmo0/dGB2D3Tal5Hwg1Vsu3+q+X5WT5CnWsIrUv4qTZD0+mZTlsyCVmAZ7KFwByME8ANygkElNHJgnC5X/OmBkQjDVUdCVt7mRYKWbKf93/JvXYeZtigHFRPniElGw2wVyaSCJKk1y3z98ggRlPO7EJFkucQZ2JdfCVZg+Rzxe0HMuGnWDfwR/YvsY++OA9lj/9+7VGswgdKUcBO+5lbtT3D1vGJWDVWnG28wyTQBR0u/sCsYZdtYBSn8fPUVYhhKL3wQ6lnmkkD+WhUPwLAT88rCFEEsuDkGOkOSQQ1zQAsxf47tAlbZstDLJm X-MS-Exchange-AntiSpam-MessageData: Dg8J0JjfJl1DLteZRRWlGbj10cwmQjBXtJHqmlC5KVBRWxw0192BQdouc+OxXObvfwo7lMC5NaqTxYZgryeEMX30l3f6do/YQnSLpEg9XOM+LApCCozRDr082r74OeVlBx4Wt1MMEw9mwMXQj3JfiQ== X-OriginatorOrg: itdev.co.uk X-MS-Exchange-CrossTenant-Network-Message-Id: 559c506b-33cb-4f69-e4eb-08d7c40cbedd X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Mar 2020 09:32:11.8888 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 2d2930c4-2251-45b4-ad79-3582c5f41740 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: UKdmATgMgX5UXXly/mKB958A8Ic8ORAJPc4JGe+PNgwN8dP06LRngV891OW6WrQsW3huDf5pyVMydOwWj7l7WQHGCfoa56GHZMcWt8gCG5c= X-MS-Exchange-Transport-CrossTenantHeadersStamped: DBBPR08MB4506 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Mar 07, 2020 at 09:29:06AM +0100, Oscar Carter wrote: > On Sun, Mar 01, 2020 at 04:09:13PM +0100, Greg Kroah-Hartman wrote: > > On Sun, Mar 01, 2020 at 02:17:01PM +0100, Oscar Carter wrote: > > This is a USB driver, performance is always limited to the hardware, not > > the CPU location of variables. > > Thank you for the explanation. > > > > > Please always benchmark things to see if it actually makes sense to make > > changes like this, before proposing them. > > I'm sorry. > I've been removed from CC list on Greg's answer, so I haven't seen the explanation earlier and reviewed the patch the next day. I should have know better, won't happen again. Thank you, Quentin