From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0b-00069f02.pphosted.com (mx0b-00069f02.pphosted.com [205.220.177.32]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3CD7468 for ; Fri, 22 Oct 2021 00:58:17 +0000 (UTC) Received: from pps.filterd (m0246632.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 19LNig9I019201; Fri, 22 Oct 2021 00:58:08 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : references : in-reply-to : content-type : content-id : content-transfer-encoding : mime-version; s=corp-2021-07-09; bh=3q4aq28zDil9W54o5RHkP3LwxKhIyey1aCGTl9ibBaM=; b=A9nsaUYcfBnDJmTv7ms6UoLL6uGAr8q8nglEDlL70FQN7a41lidyhzxF1O5krNm8SOfn W/TD2dFb0zA4IYGKJJ/VaZFCoYC3p0q0BUjWbNEnMN4hBxVozDfeTz6aknRl3SLIY1IZ nNhLS8jzctmeFyHM+wzPojg0OaaI9pNcO1QRSQ65GV5PmFrxmJF4XJ2HDOfXmFNxE2mQ 1eBMbKpjgiZoNMY0envA5nRI/W7OPkcLxHjEbs8ut3QqCHCObCurrYHgJA1jv6NrH6NN XMNQ7V9QTxnm696H3699SHsslk6lgYUU5EBk+l3XsONGAoFVexqV0ELoo/xLv/aKKvGK fQ== Received: from userp3020.oracle.com (userp3020.oracle.com [156.151.31.79]) by mx0b-00069f02.pphosted.com with ESMTP id 3btqp2rddp-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 22 Oct 2021 00:58:08 +0000 Received: from pps.filterd (userp3020.oracle.com [127.0.0.1]) by userp3020.oracle.com (8.16.1.2/8.16.1.2) with SMTP id 19M0u2Fd009049; Fri, 22 Oct 2021 00:58:07 GMT Received: from nam04-bn8-obe.outbound.protection.outlook.com (mail-bn8nam08lp2044.outbound.protection.outlook.com [104.47.74.44]) by userp3020.oracle.com with ESMTP id 3br8gx11n0-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 22 Oct 2021 00:58:07 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=RABVwPQ8fX0Y9PoAJVneF1aMlstXT8l7Jd7HaiFdLstPuBjc3qkBalSZbXcZabFwNMCtCMc4prlW7oL2Xazud4+SKYgSBjf+DslKsRwBKDuaWZVMsP81wkJ7qLMV0ww3joukzV7HxntsM/AE9W/xgEJX+xOdRLaMK/JmZs2MmtVLaT5a9uTJAFjrLKvyw7VFpk/TXkwauXcB7IJpL7UNHnbTk0UVSY1Msq3/wEvww4PgAnR8AvngXYcsoq1Sr04MZ+MRBjW5B9miAD1cK79v/ocoeBUuRZYNBsw5FBntqtukmOtwrkPW4T9Pv+WYHrVeihbOVIXW106EagSGDrjUMg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=3q4aq28zDil9W54o5RHkP3LwxKhIyey1aCGTl9ibBaM=; b=Tp3E7aRwuzVe9u4ordepQdeOG3CI2T2i05UzUTQSdGeMb5ttREspp3Hl4HQvf7IkfyRm5apqZ/ZtmvkNNzmqGJSVyps3XQlN3hyBQ/u9dsmWbZokOGlJTRhe2IpZfhXtFp0FYlmyWqXcddBIHUQUIy+880ptcMeiIwEzEJ+RxgcRpRiVvrC9iz7ysz/dIapDNt/41cA8oUAgzaCDMIBL2vDySm7zJDE8mEbkR2TyRIRF+Evqp07WE+nmfN5sEWgAtFdNcrZXJU9yXhyXeIIdNFKwJKl8HDxsDZyJLR5h3jV+PyVyW29TrvVJWhs1NcEGPdsOrj4QLYMnhMuHkEKKhA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=oracle.com; dmarc=pass action=none header.from=oracle.com; dkim=pass header.d=oracle.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.onmicrosoft.com; s=selector2-oracle-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=3q4aq28zDil9W54o5RHkP3LwxKhIyey1aCGTl9ibBaM=; b=pw4JxJvEqXhUtBDJ+keNazJjHLGeQVqIIlxYkoFheWDuFWjS+WkEzaHClAa71VJejjLuu9kYmg5iK8Yb8SRJlNV2OMZQtjcKBr4JPJqmHNjyTJ8yGFS+ViZFtV4PbOavYqrY/N1KSiqontQ4R51mtT3EfXdXZcx6NNaSoA/iteY= Received: from SJ0PR10MB4429.namprd10.prod.outlook.com (2603:10b6:a03:2d1::14) by SJ0PR10MB5533.namprd10.prod.outlook.com (2603:10b6:a03:3f7::24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4628.18; Fri, 22 Oct 2021 00:58:05 +0000 Received: from SJ0PR10MB4429.namprd10.prod.outlook.com ([fe80::401:1df2:3e9a:66c]) by SJ0PR10MB4429.namprd10.prod.outlook.com ([fe80::401:1df2:3e9a:66c%5]) with mapi id 15.20.4628.018; Fri, 22 Oct 2021 00:58:05 +0000 From: Jane Chu To: Christoph Hellwig CC: "david@fromorbit.com" , "djwong@kernel.org" , "dan.j.williams@intel.com" , "vishal.l.verma@intel.com" , "dave.jiang@intel.com" , "agk@redhat.com" , "snitzer@redhat.com" , "dm-devel@redhat.com" , "ira.weiny@intel.com" , "willy@infradead.org" , "vgoyal@redhat.com" , "linux-fsdevel@vger.kernel.org" , "nvdimm@lists.linux.dev" , "linux-kernel@vger.kernel.org" , "linux-xfs@vger.kernel.org" Subject: Re: [PATCH 5/6] dax,pmem: Add data recovery feature to pmem_copy_to/from_iter() Thread-Topic: [PATCH 5/6] dax,pmem: Add data recovery feature to pmem_copy_to/from_iter() Thread-Index: AQHXxhBDZf3mWOFAa0+X1X7SVQR1/KvdUYMAgADiGQA= Date: Fri, 22 Oct 2021 00:58:04 +0000 Message-ID: <7dc2445e-4cf0-307c-8ab6-48b886bcf34b@oracle.com> References: <20211021001059.438843-1-jane.chu@oracle.com> <20211021001059.438843-6-jane.chu@oracle.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.14.0 authentication-results: infradead.org; dkim=none (message not signed) header.d=none;infradead.org; dmarc=none action=none header.from=oracle.com; x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: c6d8d44b-407b-4b92-aa5e-08d994f70160 x-ms-traffictypediagnostic: SJ0PR10MB5533: x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:1002; x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: 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 x-forefront-antispam-report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SJ0PR10MB4429.namprd10.prod.outlook.com;PTR:;CAT:NONE;SFS:(366004)(64756008)(6506007)(4326008)(66446008)(66946007)(66476007)(53546011)(66556008)(71200400001)(186003)(6512007)(2616005)(26005)(4744005)(122000001)(44832011)(508600001)(38100700002)(54906003)(6486002)(5660300002)(38070700005)(86362001)(83380400001)(316002)(2906002)(31696002)(8936002)(7416002)(31686004)(76116006)(6916009)(8676002)(36756003)(91956017)(45980500001)(43740500002);DIR:OUT;SFP:1101; x-ms-exchange-antispam-messagedata-chunkcount: 1 x-ms-exchange-antispam-messagedata-0: =?utf-8?B?LzZaWXNlUkw3cFp5UkxGZUtVZ1VWaEhnZ21lMWUrKyt6WFEwS012ZkVqcU9q?= =?utf-8?B?amc4ZFhVMzQ1Y3Y4RnlsSjN0Q3h3eW9ML05lelN1c2hsU2dkNXd1STA0Y0Ev?= =?utf-8?B?NGgvd1FmT2hmNkdqR2MvTCtKYUhndDNwWEloMXpmNXJzOGpUOFhqSWFJK0tl?= =?utf-8?B?WVdXUTdtb1NrR3k0SXRteG55aXNHUjhPTm1YQmc2UVBOdm9GbUF0M3JpTGN0?= =?utf-8?B?ZDQwNG9DN2Fjc1NHMlkySWZER3hMZk1yS2RJeTQrOVRDd2RoZ3lvYklsbXBl?= =?utf-8?B?NmYzV3I2RWt0STI4QUlySG9xbVB0QTQ2b0d6K2ZwOFY3SUx0NlBvMDFzaDRy?= =?utf-8?B?a2xUMTJJejdyMENmSEVVZ2ROOXhidDNqOW5RMUFVbXQrc1poSGVBd2l5cWti?= =?utf-8?B?RWZhTFV0N0g1djFwNnA3Y1V0aDRFSzdYYU40ZTJwODJCZmo3WHJhSEhNanM2?= =?utf-8?B?RnY5RFJXa3o0VG9Fc2ZiK3ZSSitMOTB5YnRUVFdObU80eXB2ajFVWlJCaHNY?= =?utf-8?B?Z0s3dzkxSTJPNVVmT3JTNjdKUytwZEp5TURwZERDLzlBaXRlYnppdFFkZDEr?= =?utf-8?B?MjBpV1RMK0tkZXNWS2gwVEtmZ1QwL3Z1Z0FrTnRKWmh4S0lKOFpvUkJHYzJx?= =?utf-8?B?V0tQMGVremJTQ2xUVnpKSHZYNUJFUTlUTVpOc0VzTWNyQ1pMUFpVRCtkRWRI?= =?utf-8?B?dzBnOHlqYTQvbTY3VkduQlVSZzhTVk5sOXFWNUZzNm5yejN3djRGQ3l3blZO?= =?utf-8?B?Z0hlZm9iS2JJZTI1ZEVKUjh1Sk5kWkxRdHp1T2VoNEZDOFp2eEpueTIxNU9u?= =?utf-8?B?Z1R1d2loSWphQWplaGVYNTgvTVdOTnZaM050Zk9vamROS1RhSnEwczcvdC9n?= =?utf-8?B?MVVjSmN1RzVhMXFUU05nV2h5UlkxWjFyMXczTzcyZ3ZKRUdjNDFRdjN4Znc5?= =?utf-8?B?Vjg1dlN1RUZZSXlLVTFRT2czVCtBNW1mUUZ0YmUvaEFDMUV1Q1kycDllUFhX?= =?utf-8?B?SkFBeUo2Sy9OWFFxL1RRcFpXbXlmOFFYNHY4OUxEdndNTG1jNThoeitHbGZH?= =?utf-8?B?TXZCRVJwck1UQ0o1UXJwUjVwT3FGZlVKaWRJQnA3VkRKRURLZkI1WkRKOTlw?= =?utf-8?B?VVpaNllyNGk0Y1E2ME5CUFpZSDRrV1VTQkFMcTJsYVFuTkY3MXZNcGNubjF4?= =?utf-8?B?ZUZnc2FKdjdYOWsxajBGcWljR0FOL2pCRWV3Mkg1bUVBbWdkaGZpUGF1L210?= =?utf-8?B?M1FpTXp5UUxWS1N5L2pMK1BBS1VkOFVBdjZHSE1taHhMWk9ZSWxvUXBPbjdX?= =?utf-8?B?c0VLaTFPZ3hHRzc0QWYwVHNCTExNemJmeUMvRzF6cHNscGtrRUVuMDFKMmRz?= =?utf-8?B?VXNEN2ZrRnkwalZST1RzOVBFdWJMaEVMOGVha2l2NU5YTGdRK0h4ZDFJWC9i?= =?utf-8?B?aFk1ZFlneFNESkRnbHlITGEyOXo0Q1IzSkNMOFJTdG5wSUFZbWphOVBoQis1?= =?utf-8?B?L0t6NEtxQm5POUxOMjVaRVIzQUlROVgza2NMNlFFMHVPb0tZa00vMUZSUmdM?= =?utf-8?B?cXZxS09RNGYzeFlkbGVmR2FKSXlwaWlLRjh1M3lQT0plZ1pOTXRiRFJnK0J2?= =?utf-8?B?WCtmYnFTZFZNQ25MY1BVdnhwT1FlZ2JkL04rWWREK1lYV2FLNU5jekxSakVW?= =?utf-8?B?Q0VrTVB2US9sTFNzcjl2cExKYW9DVkEzSk1aQnhpNlNZMlFJeG9WVmtKZVl5?= =?utf-8?B?RzFuZGNWR1VSTDFsQnVMbW9PT3JMOUdHNi9BWCtqOHpVTzBoc1oxSVZ1clFK?= =?utf-8?B?S0VIZ3N3TVNvRHh6QzI4Q25WSW0rOTYxOHp6ZGx4TTE5MDBYeU1CekhJUlBN?= =?utf-8?B?cjBUMldsL1BvaktJSnZJSy9rNlk5ME9laFNFV1FsdDMreUhCUGxlMXlCTnN2?= =?utf-8?Q?AexZfnBC4Rg=3D?= Content-Type: text/plain; charset="utf-8" Content-ID: <78623CBF5E60C147ABCF78F18FF23386@namprd10.prod.outlook.com> Content-Transfer-Encoding: base64 Precedence: bulk X-Mailing-List: nvdimm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: SJ0PR10MB4429.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: c6d8d44b-407b-4b92-aa5e-08d994f70160 X-MS-Exchange-CrossTenant-originalarrivaltime: 22 Oct 2021 00:58:04.9764 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: jane.chu@oracle.com X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR10MB5533 X-Proofpoint-Virus-Version: vendor=nai engine=6300 definitions=10144 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxlogscore=999 mlxscore=0 adultscore=0 spamscore=0 phishscore=0 bulkscore=0 suspectscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2109230001 definitions=main-2110220003 X-Proofpoint-ORIG-GUID: Ij43I3ZdzYUBLXJy0ohdiKNp1otPnKOt X-Proofpoint-GUID: Ij43I3ZdzYUBLXJy0ohdiKNp1otPnKOt T24gMTAvMjEvMjAyMSA0OjI4IEFNLCBDaHJpc3RvcGggSGVsbHdpZyB3cm90ZToNCj4+ICsJaWYg KGZsYWdzICYgREFYREVWX0ZfUkVDT1ZFUlkpIHsNCj4+ICsJCWxlYWRfb2ZmID0gKHVuc2lnbmVk IGxvbmcpYWRkciAmIH5QQUdFX01BU0s7DQo+PiArCQlsZW4gPSBQRk5fUEhZUyhQRk5fVVAobGVh ZF9vZmYgKyBieXRlcykpOw0KPj4gKwkJaWYgKGlzX2JhZF9wbWVtKCZwbWVtLT5iYiwgUEZOX1BI WVMocGdvZmYpIC8gNTEyLCBsZW4pKSB7DQo+PiArCQkJaWYgKGxlYWRfb2ZmIHx8ICEoUEFHRV9B TElHTkVEKGJ5dGVzKSkpIHsNCj4+ICsJCQkJZGV2X3dhcm4oZGV2LCAiRm91bmQgcG9pc29uLCBi dXQgYWRkciglcCkgYW5kL29yIGJ5dGVzKCUjbHgpIG5vdCBwYWdlIGFsaWduZWRcbiIsDQo+PiAr CQkJCQlhZGRyLCBieXRlcyk7DQo+PiArCQkJCXJldHVybiAoc2l6ZV90KSAtRUlPOw0KPj4gKwkJ CX0NCj4+ICsJCQlwbWVtX29mZiA9IFBGTl9QSFlTKHBnb2ZmKSArIHBtZW0tPmRhdGFfb2Zmc2V0 Ow0KPj4gKwkJCWlmIChwbWVtX2NsZWFyX3BvaXNvbihwbWVtLCBwbWVtX29mZiwgYnl0ZXMpICE9 DQo+PiArCQkJCQlCTEtfU1RTX09LKQ0KPj4gKwkJCQlyZXR1cm4gKHNpemVfdCkgLUVJTzsNCj4+ ICsJCX0NCj4gDQo+IFNob3VsZG4ndCB0aGlzIGp1c3QgZ28gZG93biBpbiBhIHNlcGFyZSAtPmNs ZWFyX3BvaXNvbiBvcGVyYXRpb24NCj4gdG8gbWFrZSB0aGUgd2hvbGUgdGhpbmcgYSBsaXR0bGUg ZWFzaWVyIHRvIGZvbGxvdz8NCj4gDQoNCkRvIHlvdSBtZWFuIHRvIGxpZnQgb3IgcmVmYWN0b3Ig dGhlIGFib3ZlIHRvIGEgaGVscGVyIGZ1bmN0aW9uIHNvIGFzDQp0byBpbXByb3ZlIHRoZSByZWFk YWJpbGl0eSBvZiB0aGUgY29kZT8gIEkgY2FuIGRvIHRoYXQsIGp1c3QgdG8gY29uZmlybS4NCk9u IHRoZSBzYW1lIG5vdGUsIHdvdWxkIHlvdSBwcmVmZXIgdG8gcmVmYWN0b3IgdGhlIHJlYWQgcGF0 aCBhcyB3ZWxsPw0KDQp0aGFua3MhDQotamFuZQ0KDQo=