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:   =?utf-8?B?SE9SSUdVQ0hJIE5BT1lBKOWggOWPo+OAgOebtOS5nyk=?= 
        <naoya.horiguchi@nec.com>
To:     Miaohe Lin <linmiaohe@huawei.com>
CC:     "akpm@linux-foundation.org" <akpm@linux-foundation.org>,
        "willy@infradead.org" <willy@infradead.org>,
        "vbabka@suse.cz" <vbabka@suse.cz>,
        "dhowells@redhat.com" <dhowells@redhat.com>,
        "neilb@suse.de" <neilb@suse.de>,
        "david@redhat.com" <david@redhat.com>,
        "apopple@nvidia.com" <apopple@nvidia.com>,
        "surenb@google.com" <surenb@google.com>,
        "minchan@kernel.org" <minchan@kernel.org>,
        "peterx@redhat.com" <peterx@redhat.com>,
        "sfr@canb.auug.org.au" <sfr@canb.auug.org.au>,
        "linux-mm@kvack.org" <linux-mm@kvack.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v3 1/3] mm/swapfile: unuse_pte can map random data if swap
 read fails
Thread-Topic: [PATCH v3 1/3] mm/swapfile: unuse_pte can map random data if
 swap read fails
Thread-Index: AQHYV7s04sjKvB31sE2FEmou2La8+60Xu7UA
Date:   Tue, 10 May 2022 06:17:12 +0000
Message-ID: <20220510061712.GA162496@hori.linux.bs1.fc.nec.co.jp>
References: <20220424091105.48374-1-linmiaohe@huawei.com>
 <20220424091105.48374-2-linmiaohe@huawei.com>
In-Reply-To: <20220424091105.48374-2-linmiaohe@huawei.com>
Accept-Language: ja-JP, en-US
Content-Language: en-US
x-ms-exchange-antispam-messagedata-chunkcount: 1
x-ms-exchange-antispam-messagedata-0: =?utf-8?B?VEpwU3VGK0taWUZVZ2s5SGw3VWl4V1Mrd2xRUUgrcVVqOFVibWJVYnFSdWRL?=
 =?utf-8?B?dUp3VGt4amVoalNqdytHV3RlOC9ydi9Mc3VsNVpuOEFzZVZpMHAvcXdoRVly?=
 =?utf-8?B?eUFRaGVERkppRFdwK3NYU1hQYkIvd2IvNFVzSUtTSUFQRm5RMi9IRG9qbHRN?=
 =?utf-8?B?anlyN0dtekNWblQ4VWRySzNlTHdDbGJiRUZSTWF5OGFtczhlWVBrM2lJdE95?=
 =?utf-8?B?TjJIcUxEY2I0bVdzSnR5cjBZZ1cvcEVZWmxIQUNjWTlWOFBtMUg2cVdXdzZs?=
 =?utf-8?B?ZFdwTlJlRUd3d01IWGpETmUrdDdXbC9CNUF0dXBsUmlqeEwxR3hSY0wxbHM3?=
 =?utf-8?B?ZGRSUkFFMFd0UGRyWlhzNU5ua3VhZnprczNBYkExOHYwRVYwZnlPYmpJbVZl?=
 =?utf-8?B?cFZ1aXNUK2k3SVQ1clRvQzhKRG5EZldKRGl2RjFOWjVFT1FsWHN4U3AzR2F0?=
 =?utf-8?B?QTVmblNadysxUC9PNG1hcXA2bVA1U1AvY04rNVI0dStPOFVnQjBNMUxVMlZ1?=
 =?utf-8?B?SjcyVTNVK00vbmNBNXRjYTU4dFlUa1VpdUlMa21oRDRsWnFWRXJMZGFFNTBV?=
 =?utf-8?B?d1hKMHRxZ0hyZnZxdFZMYm1JMU5qM1B5RFM3TVNXR0FEMFpxclB5YUwwenRT?=
 =?utf-8?B?R0pzc3VMZzdyZVhKbXF1UUJTanAyWnZOSmJKcVRWZ2FaeXdmV3JTandOMlRF?=
 =?utf-8?B?ZEJZWmZ2MVJIcWxFU1FTMGNRR3hyaEpqZ2RRcmFFWlh6K0EvaVRwM0V4a3lM?=
 =?utf-8?B?UWJsVFJUSitYUlBnZDFYVUMzblNXVmdVQUMxbEx1ekV0U05jd0FDTkJkY2t3?=
 =?utf-8?B?YTJ0N0dhRE5jRjdRRnAyek5wZFhmQ1NRSk1BU3RRYzVYSmJIaWJTdjcza2xn?=
 =?utf-8?B?Z3MwVFV4YW5TS0NFaXdud3liNXVveEFENStnRU94VFk5cGNEaDAxN3RubndT?=
 =?utf-8?B?NzFNS0lSanhGZEV2cnpnSDEyWVFWbGlQRTIvQzQ3WHJNc0Q3eFVJRGhqUWh0?=
 =?utf-8?B?ODdaVWNLL09OaGYrR2RWdUNGQlZteGp3eUdKV012TFVabW5SNXZXU1ljK1BH?=
 =?utf-8?B?ZTFSczVFNStleFlkcFIxVnNhK1pQN2dxMEE3aXo2Rzd1S1B3SDRsVGVtOGFQ?=
 =?utf-8?B?dlB4dVo2M2dhb1FqSUpVaEFJdlFwNlQ1Mldrb0oyRHhvMk9nbUUxeE5DY2U4?=
 =?utf-8?B?dnBEbEUwTFhnRURvcU1Hb0o5QkUyOGNBNFlPellCN1VNV1ZOVkVDMktTcmh2?=
 =?utf-8?B?U2ZML0hjbWM3amIrY0RYYThtaXVKQytDZVB0WmhqZHFoVVhOQjNIN0J2TWc3?=
 =?utf-8?B?aWxlUGpHV3Y0UHlpUHVUQVBGeFBkbEd5b0pldHBuQTZTblpwaGJ2WWlXcWdF?=
 =?utf-8?B?UXNEQkk3VmJtdGxVTVJCN1YzY2hoSDRmendQaC83eFBSbXdWeW1aeHplbG41?=
 =?utf-8?B?Um9kNTRFWThoNDJwbUNha1gwQmk3NVZPMk5saTNBVFBLcnU5aVR6Rklza2ZE?=
 =?utf-8?B?TkI1RW9yWFJML2hiOXdVak1GYVQvMU15L09mWlRkOW5Ob2JuN0kwRFpSbmYx?=
 =?utf-8?B?ZmZJOEVBOExEem1DOWVXZHdZQ29RQmhtY3V6OGZ0QzBjYmlmVlQ5UDFrRktT?=
 =?utf-8?B?RVhmOTMzOUxTOVAyVU0zUjM0MTIrMk91WnFqN3FZMW5JOXlvUHREZEx3T3Vh?=
 =?utf-8?B?MFp2L1laZklxN0lHU1VpQXFUaEpDbW5YTHJ5Zll1OXVrSWMraG5kaDF0M0Yr?=
 =?utf-8?B?SGYyelE1d3BXQmlYWDMrTWo5elJ6a3JvTDJoUDFWMWR6NzVtK3ZseUNxYnh2?=
 =?utf-8?B?Q3VocitWdmJkUEFIYzVNRHh4aGJJbmZkU29TTUtwd2pWNzFUVWxXT0FzQjB6?=
 =?utf-8?B?UERFNEJJK2pmME8vYkxlck9aOWtWejBwUXJTUTB4dngySFppZUFWcjNzZks2?=
 =?utf-8?B?ZkF4Rkl3cXhIZWxLVzZLdmtzV0J5TUVRMkhNUitKL0hTNmpyYnpxTk1MYm5G?=
 =?utf-8?B?NW12NFVNNTdzcWs0UHppZE1OTEVxbGFFRElTbzlESVVTYXIrSlVzdmd4Y1I0?=
 =?utf-8?B?REhtdW1TU1Z5QWlKVW5MMWR1cElTUTVGRjRBTmY0UnMvR25vc3Jpd1VrRUhD?=
 =?utf-8?B?NW85OFBOMEUrZkhYQ3hOdVkzWnJIbVRKdkVObGtYR0FXZDdEUVZlaWlpRUdY?=
 =?utf-8?B?WlZXZXprK1EzZ1hEcmFkSE56MzV6TVNHdUduY3JBUW1UYkF1ZUVTR3NHdms3?=
 =?utf-8?B?M1RrdDh3TnhaZWsrNWRaVTRDUzlJRFhmcXZlTm83MnpWdG9yQjhnV0FLZmRD?=
 =?utf-8?B?WXdneXNxd3pRMGJpV21tYXp6bE4vVFc0QnhFSTJLTGpaWm1FS3BFMkIrNUZt?=
 =?utf-8?Q?/yPcssH4bOpTh9VI=3D?=
Content-Type: text/plain; charset="utf-8"
Content-ID: <F2F7DDAE8887CF41AA0A34192CC90636@jpnprd01.prod.outlook.com>
Content-Transfer-Encoding: base64
MIME-Version: 1.0
X-OriginatorOrg: nec.com
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-AuthSource: TYWPR01MB8591.jpnprd01.prod.outlook.com
X-MS-Exchange-CrossTenant-Network-Message-Id: 0641684a-0486-4a65-7210-08da324cb909
X-MS-Exchange-CrossTenant-originalarrivaltime: 10 May 2022 06:17:12.9497
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: e67df547-9d0d-4f4d-9161-51c6ed1f7d11
X-MS-Exchange-CrossTenant-mailboxtype: HOSTED
X-MS-Exchange-CrossTenant-userprincipalname: bEeLB9ky5jc2h7k2SpLeBkM88mamvR/XvdKBxWxdbBOGfWkjjCQyuvXHKT8EKrF4oOBMCR6wU8uMkWD7KV9oww==
X-MS-Exchange-Transport-CrossTenantHeadersStamped: OSAPR01MB2369
X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED,
        DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE,
        RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_PASS,T_SCC_BODY_TEXT_LINE,
        URIBL_BLOCKED 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

T24gU3VuLCBBcHIgMjQsIDIwMjIgYXQgMDU6MTE6MDNQTSArMDgwMCwgTWlhb2hlIExpbiB3cm90
ZToNCj4gVGhlcmUgaXMgYSBidWcgaW4gdW51c2VfcHRlKCk6IHdoZW4gc3dhcCBwYWdlIGhhcHBl
bnMgdG8gYmUgdW5yZWFkYWJsZSwNCj4gcGFnZSBmaWxsZWQgd2l0aCByYW5kb20gZGF0YSBpcyBt
YXBwZWQgaW50byB1c2VyIGFkZHJlc3Mgc3BhY2UuICBJbiBjYXNlDQo+IG9mIGVycm9yLCBhIHNw
ZWNpYWwgc3dhcCBlbnRyeSBpbmRpY2F0aW5nIHN3YXAgcmVhZCBmYWlscyBpcyBzZXQgdG8gdGhl
DQo+IHBhZ2UgdGFibGUuICBTbyB0aGUgc3dhcGNhY2hlIHBhZ2UgY2FuIGJlIGZyZWVkIGFuZCB0
aGUgdXNlciB3b24ndCBlbmQgdXANCj4gd2l0aCBhIHBlcm1hbmVudGx5IG1vdW50ZWQgc3dhcCBi
ZWNhdXNlIGEgc2VjdG9yIGlzIGJhZC4gIEFuZCBpZiB0aGUgcGFnZQ0KPiBpcyBhY2Nlc3NlZCBs
YXRlciwgdGhlIHVzZXIgcHJvY2VzcyB3aWxsIGJlIGtpbGxlZCBzbyB0aGF0IGNvcnJ1cHRlZCBk
YXRhDQo+IGlzIG5ldmVyIGNvbnN1bWVkLiAgT24gdGhlIG90aGVyIGhhbmQsIGlmIHRoZSBwYWdl
IGlzIG5ldmVyIGFjY2Vzc2VkLCB0aGUNCj4gdXNlciB3b24ndCBldmVuIG5vdGljZSBpdC4NCj4g
DQo+IFNpZ25lZC1vZmYtYnk6IE1pYW9oZSBMaW4gPGxpbm1pYW9oZUBodWF3ZWkuY29tPg0KPiBB
Y2tlZC1ieTogRGF2aWQgSGlsZGVuYnJhbmQgPGRhdmlkQHJlZGhhdC5jb20+DQoNCldoZW4gSSBy
ZXByb2R1Y2VkIHRoZSBpc3N1ZSAoZ2VuZXJhdGVkIHJlYWQgZXJyb3Igd2l0aCBkbS1kdXN0KSwg
SSBzYXcNCmluZmluaXRlIGxvb3AgaW4gdGhlIHdoaWxlIGxvb3AgaW4gc2htZW1fdW51c2VfaW5v
ZGUoKSAoYW5kIHRoaXMgaGFwcGVucw0KZXZlbiB3aXRoIHRoaXMgcGF0Y2gpLiBJIGNvbmZpcm1l
ZCB0aGF0IHNobWVtX3N3YXBpbl9wYWdlKCkgcmV0dXJucyAtRUlPLA0KYnV0IHNobWVtX3VudXNl
X3N3YXBfZW50cmllcygpIGRvZXMgbm90IHJldHVybiB0aGUgZXJyb3IgdG8gdGhlIGNhbGxlcnMs
DQpzbyB0aGUgd2hpbGUgbG9vcCBpbiBzaG1lbV91bnVzZV9pbm9kZSgpIHNlZW1zIG5vdCBicmVh
ay4NCg0KU28gbWF5YmUgeW91IG5lZWQgbW9yZSBjb2RlIGFyb3VuZCBzaG1lbV91bnVzZV9pbm9k
ZSgpIHRvIGhhbmRsZSB0aGUgZXJyb3I/DQoNClRoYW5rcywNCk5hb3lhIEhvcmlndWNoaQ==