Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Dylan Yudaken <dylany@fb.com>
To:     "haoxu@linux.alibaba.com" <haoxu@linux.alibaba.com>,
        "axboe@kernel.dk" <axboe@kernel.dk>,
        "asml.silence@gmail.com" <asml.silence@gmail.com>,
        "io-uring@vger.kernel.org" <io-uring@vger.kernel.org>
CC:     Kernel Team <Kernel-team@fb.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2 4/4] io_uring: pre-increment f_pos on rw
Thread-Topic: [PATCH v2 4/4] io_uring: pre-increment f_pos on rw
Thread-Index: AQHYJy3DKkNH7lIuQ0i9mEbODtcbvayfLvEAgAA3NIA=
Date:   Tue, 22 Feb 2022 10:52:17 +0000
Message-ID: <fdcf70aaf53b4d3040bed95535846edc0120bfea.camel@fb.com>
References: <20220221141649.624233-1-dylany@fb.com>
         <20220221141649.624233-5-dylany@fb.com>
         <9cd3cc84-a2a0-a827-3fb8-bd2928eabd28@linux.alibaba.com>
In-Reply-To: <9cd3cc84-a2a0-a827-3fb8-bd2928eabd28@linux.alibaba.com>
Accept-Language: en-GB, en-US
Content-Language: en-US
x-ms-exchange-antispam-messagedata-chunkcount: 1
x-ms-exchange-antispam-messagedata-0: =?utf-8?B?QlJHdllOYWdzUkdBRG9xKy9vZzFCaVBsQzJXT1FjMk9YV242MmVsdUhmME9G?=
 =?utf-8?B?Y3dQd251U1FtckxJdTB3MmpyOVhKcG5NTG5oeEZPL3dYZDN0ZUl1NzRaT0R5?=
 =?utf-8?B?RUlJZnRqWlJzbkl5L3h1ai9IbForTHRwU010bkIveTVTQ0tHNXVKNFpUZVdR?=
 =?utf-8?B?ay9Ed3RJYnFhZmFRaXAybTY0Yjl1a0FuUFdUZHd0Y1BlaStnbEFBaTVtQ0xm?=
 =?utf-8?B?ZEtjTWZDY29aUFkzdjhQcUJkNWN5OUlKNWRXWnl6WWtweHVENTdOb2ZJNXFH?=
 =?utf-8?B?UTZrRDUwYlJnUUxDdXFwSWFNNXkvaHVQcVpwRFlXaGdDWDZVbE9Uc003V0dY?=
 =?utf-8?B?K0dicEVuU2ExYmFyMHJ3NHRpVktvUVdEU20veklDblI0ZkVzZXNzTGQ2d0lj?=
 =?utf-8?B?ZC8zaS9OaEV0UHEzNFIrRGRtdzhodlZJTjF3eU9KNkd1TFpCSWFJdXZKVUxB?=
 =?utf-8?B?bWlzanE4WFdaak9TTjZKTzY0bXErcUJiSllhenkyQ2ZhV0tzWFZMcDdob0Y3?=
 =?utf-8?B?SEFkSzR5ZzZlNjBua0l1b0NWcjZOUzBoUS9lVzl3UU1JUzZKdXpYMExkMk1s?=
 =?utf-8?B?cUlZZEhIRnRrdy9SUjF4am56bmlVbUhKYlFvQzhkU3BvRGUrRmRKMWowMGxk?=
 =?utf-8?B?M2ZSS2Fad2M1Wkc0SExaZFJNNGZzQVA3TG03cW1VclBWc285cno2Qml6bjNL?=
 =?utf-8?B?Yy9MRDVnWnRteENzMktKNDQxczJZOHBNQjFkSUdkWlNhcFhJcDVkS0Qycjc5?=
 =?utf-8?B?YVdmYXBobkxSR1pneFdYZlJ5SCtLanFoLzJwMUd5bVQyVzE5akordWpZcytR?=
 =?utf-8?B?U2hYa2kzN1R2NUtldlg3Y3d4bElJRFpkQTRtaUdmcWpvVGc2bUVuNlFQSWRC?=
 =?utf-8?B?OGd5dG1FM1BURTlqbEdoZDg4WGY0SkdNN2JWMXpyQXdUYzJsQS9hUmxWNnJw?=
 =?utf-8?B?bUJ2ZjJhd0J6TnpUUDJ1Z0RZbllkRHlZV041dmtTRnRVczF3c2UwTFhIK0Ni?=
 =?utf-8?B?OUNrWTUvcjBaNWlmU2Zqa2RDbmNORFk3VGVXWjN6dzdPSWF0Yi9rbTJLZ1Vh?=
 =?utf-8?B?VW1pN28wc3JOVWt5SitPT3RIdkJieUhJWmFBNkF4VnBtakhERFlvYlpBbk1t?=
 =?utf-8?B?S0VEVUlxb3B1SzlXeU5qQVVKbzJwWHpPYjF6eUtueFVLNmE0dDNnZnFjNmlr?=
 =?utf-8?B?Tks2Q3lQUEcvZXVQTVBVMy93ZW1seGpNZGdkMWRjbUdKWXdmcGVGeUFLRFha?=
 =?utf-8?B?V2VTVkFEUEI3TGJnZ1ZLQVdGeW41b0FTa2thL2dzWFFQWjNEcTNWTk5ySXJO?=
 =?utf-8?B?R1hwVytzVUk4U2dYKyt3WmNsQzZSQU0vZlltVWlQZlIvYzVTTmQyM01IalV5?=
 =?utf-8?B?d3BIWG5nQk81NlZGL2xMR1JweUM2b0lZbTI4blZSTXR5RzFGcnJXb2tmck83?=
 =?utf-8?B?Tk5iQnh3VXZhYXF5bDVIdlRQaFUwcWU5ZWZvYXI4NEZHQzd1akQ5bTZqU2Nl?=
 =?utf-8?B?L04zS014RHBGdm5HR2lRa3NIRFRCK0ZwYWY2Q0d6WGRTNWR2WVl2T3lyYkxx?=
 =?utf-8?B?NnpTWERHVTdUWnhjdzJyc28reTBzU0l6SS93QWF2MVVoRUp4dkNZZGNSWmY2?=
 =?utf-8?B?Wjk3RmU0SmNCSDArNXpkbWlkbmZ2dGRDeTlBdDhOZnY4RU9TQ1NNY3ZlY0Zx?=
 =?utf-8?B?U1FzdkVzSGNxQ2hTWERhNGx5aVlXdHFYZmdNODJDei96UnNvRVIyUHBRWnQ5?=
 =?utf-8?B?ODhHbUEvOVVQbEcxYmhZK2NZdkprLzhUNGkwTU80VFJiUlVPZnF6dUxEYnhl?=
 =?utf-8?B?R2Z4aXh0anBpQW9jZzJKL2NrRlhSZWtOckRpUjY4aHQrRjdZUXFoL0FUM1R0?=
 =?utf-8?B?SGk2emlYZUR4b2R6Y3J4Mkd5SkkyeEVqeGRlUTRTUFNmQzRpNHJyM3lhcmN0?=
 =?utf-8?B?TmhkclRyWlp5ejNZTHZVTlkvRzBOcmRjZElnT09ZMS8zVFpXejRaZGNQNHJN?=
 =?utf-8?B?NzhaZURwT3pPTnlKSTI2YnIzS084dExtVFU5ZUdkaExLREJoK2pEbEppV1hU?=
 =?utf-8?B?Mzd2cEdhVXpReGZxZGROTVV6MDBQYnQ4M2VOTzluTy9QaE5xN0JBaE45aWRI?=
 =?utf-8?B?Z01TZ2psbmpZYS9aQkgyTXgramRUa20vc3hxWlB1M1A5OERXeDZQMkhRQlhE?=
 =?utf-8?B?TlE9PQ==?=
Content-Type: text/plain; charset="utf-8"
Content-ID: <9C5BD3CE4CA49C43BE63FD8F2166A172@namprd15.prod.outlook.com>
Content-Transfer-Encoding: base64
MIME-Version: 1.0
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-AuthSource: SA1PR15MB4854.namprd15.prod.outlook.com
X-MS-Exchange-CrossTenant-Network-Message-Id: 2793be5a-3510-4c49-438d-08d9f5f164a7
X-MS-Exchange-CrossTenant-originalarrivaltime: 22 Feb 2022 10:52:17.3617
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: 8ae927fe-1255-47a7-a2af-5f3a069daaa2
X-MS-Exchange-CrossTenant-mailboxtype: HOSTED
X-MS-Exchange-CrossTenant-userprincipalname: HiDzMwHR+BYWAg8zd5YCi+oTIMgX9gQigg0XKeBYA2Tx5Mr94YNLuUT8IWCai7Uf
X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR15MB4056
X-OriginatorOrg: fb.com
X-Proofpoint-GUID: WV-JBpZbkL7ouSta9bOBMf_RNGDBk9wU
X-Proofpoint-ORIG-GUID: WV-JBpZbkL7ouSta9bOBMf_RNGDBk9wU
X-Proofpoint-Virus-Version: vendor=baseguard
 engine=ICAP:2.0.205,Aquarius:18.0.816,Hydra:6.0.425,FMLib:17.11.62.513
 definitions=2022-02-22_02,2022-02-21_02,2021-12-02_01
X-Proofpoint-Spam-Details: rule=fb_outbound_notspam policy=fb_outbound score=0 malwarescore=0
 suspectscore=0 lowpriorityscore=0 bulkscore=0 phishscore=0 adultscore=0
 mlxlogscore=717 mlxscore=0 priorityscore=1501 spamscore=0 clxscore=1015
 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1
 engine=8.12.0-2201110000 definitions=main-2202220063
X-FB-Internal: deliver
X-Spam-Status: No, score=-2.8 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH,
        DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_LOW,
        RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_NONE,
        T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on
        lindbergh.monkeyblade.net
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
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