From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 10982C433B4 for ; Thu, 29 Apr 2021 22:32:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D0FBF61419 for ; Thu, 29 Apr 2021 22:32:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229701AbhD2Wd0 (ORCPT ); Thu, 29 Apr 2021 18:33:26 -0400 Received: from szxga08-in.huawei.com ([45.249.212.255]:3347 "EHLO szxga08-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229519AbhD2WdZ (ORCPT ); Thu, 29 Apr 2021 18:33:25 -0400 Received: from dggeme760-chm.china.huawei.com (unknown [172.30.72.56]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4FWVX51FmMz19J7R; Fri, 30 Apr 2021 06:28:37 +0800 (CST) Received: from dggemi761-chm.china.huawei.com (10.1.198.147) by dggeme760-chm.china.huawei.com (10.3.19.106) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Fri, 30 Apr 2021 06:32:35 +0800 Received: from dggemi761-chm.china.huawei.com ([10.9.49.202]) by dggemi761-chm.china.huawei.com ([10.9.49.202]) with mapi id 15.01.2176.012; Fri, 30 Apr 2021 06:32:30 +0800 From: "Song Bao Hua (Barry Song)" To: Dave Hansen , "tiantao (H)" , "corbet@lwn.net" , "gregkh@linuxfoundation.org" CC: "linux-doc@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "Rafael J. Wysocki" , Peter Zijlstra , "Valentin Schneider" , Dave Hansen , Daniel Bristot de Oliveira Subject: RE: [PATCH 1/2] CPU, NUMA topology ABIs: clarify the overflow issue of sysfs pagebuf Thread-Topic: [PATCH 1/2] CPU, NUMA topology ABIs: clarify the overflow issue of sysfs pagebuf Thread-Index: AQHXPMXH0SQBD1qG+ECo3ZrOidSRtqrLBimAgADzHOD//4cYAIAAjhuw Date: Thu, 29 Apr 2021 22:32:30 +0000 Message-ID: <4bf6870f7f3942398e4d1fdaa42184c7@hisilicon.com> References: <1619679819-45256-1-git-send-email-tiantao6@hisilicon.com> <1619679819-45256-2-git-send-email-tiantao6@hisilicon.com> <146e051b-603c-a6d3-43d8-d083cf2c8119@intel.com> <602918a1e2214ea7bd0890a751975566@hisilicon.com> <7c663f7e-07e0-6d95-3012-6e31a1b78f7e@intel.com> In-Reply-To: <7c663f7e-07e0-6d95-3012-6e31a1b78f7e@intel.com> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.126.200.93] Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org DQoNCj4gLS0tLS1PcmlnaW5hbCBNZXNzYWdlLS0tLS0NCj4gRnJvbTogRGF2ZSBIYW5zZW4gW21h aWx0bzpkYXZlLmhhbnNlbkBpbnRlbC5jb21dDQo+IFNlbnQ6IEZyaWRheSwgQXByaWwgMzAsIDIw MjEgOTozOSBBTQ0KPiBUbzogU29uZyBCYW8gSHVhIChCYXJyeSBTb25nKSA8c29uZy5iYW8uaHVh QGhpc2lsaWNvbi5jb20+OyB0aWFudGFvIChIKQ0KPiA8dGlhbnRhbzZAaGlzaWxpY29uLmNvbT47 IGNvcmJldEBsd24ubmV0OyBncmVna2hAbGludXhmb3VuZGF0aW9uLm9yZw0KPiBDYzogbGludXgt ZG9jQHZnZXIua2VybmVsLm9yZzsgbGludXgta2VybmVsQHZnZXIua2VybmVsLm9yZzsgUmFmYWVs IEouDQo+IFd5c29ja2kgPHJhZmFlbEBrZXJuZWwub3JnPjsgUGV0ZXIgWmlqbHN0cmEgPHBldGVy ekBpbmZyYWRlYWQub3JnPjsgVmFsZW50aW4NCj4gU2NobmVpZGVyIDx2YWxlbnRpbi5zY2huZWlk ZXJAYXJtLmNvbT47IERhdmUgSGFuc2VuDQo+IDxkYXZlLmhhbnNlbkBsaW51eC5pbnRlbC5jb20+ OyBEYW5pZWwgQnJpc3RvdCBkZSBPbGl2ZWlyYSA8YnJpc3RvdEByZWRoYXQuY29tPg0KPiBTdWJq ZWN0OiBSZTogW1BBVENIIDEvMl0gQ1BVLCBOVU1BIHRvcG9sb2d5IEFCSXM6IGNsYXJpZnkgdGhl IG92ZXJmbG93IGlzc3VlDQo+IG9mIHN5c2ZzIHBhZ2VidWYNCj4gDQo+IE9uIDQvMjkvMjEgMjow OCBQTSwgU29uZyBCYW8gSHVhIChCYXJyeSBTb25nKSB3cm90ZToNCj4gPj4gRG8gd2UgdGhpbmsg PlBBR0VfU0laRSBkYXRhIG91dCBvZiBhIHN5c2ZzIGZpbGUgaXMgYSB3b3JzZSBBQkkgYnJlYWsg b3INCj4gPj4gc29tZXRoaW5nPw0KPiA+IFRoaXMga2luZCBvZiBjcHUgbGlzdCBBQklzIGhhdmUg YmVlbiB0aGVyZSBmb3IgbWFueSB5ZWFycyBidXQgaGF2ZQ0KPiA+IG5ldmVyIGJlZW4gZG9jdW1l bnRlZCB3ZWxsLg0KPiA+DQo+ID4gV2UgaGF2ZSB0d28gQUJJczoNCj4gPiB4eHhfY3B1cyAtIGlu IGZvcm1hdCBsaWtlIDMzMzMzMzMzMzMNCj4gPiB4eHhfY3B1c19saXN0IC0gaW4gZm9ybWF0IGxp a2UgMCwzLDUsNyw5LDExLDEzLi4uLg0KPiA+DQo+ID4geHh4X2NwdXNfbGlzdCBpcyBhbm90aGVy IGh1bWFuLXJlYWRhYmxlIHZlcnNpb24gb2YgeHh4X2NwdXMuIEl0IGRvZXNuJ3QNCj4gPiBpbmNs dWRlIGFueSBtb3JlIHVzZWZ1bCBpbmZvcm1hdGlvbiB0aGFuIHh4eF9jcHVzLg0KPiA+DQo+ID4g eHh4X2NwdXMgd29uJ3Qgb3ZlcmZsb3cgYmFzZWQgb24gQlVJTERfQlVHX09OIGFuZCBtYXhpbXVt IE5SX0NQVVMNCj4gPiBpbiBrY29uZmlnIG5vd2FkYXlzLg0KPiA+DQo+ID4gaWYgcGVvcGxlIGFs bCBhZ3JlZSB0aGUgdHJpbW1lZCBsaXN0IGlzIGEgYnJlYWsgb2YgQUJJLCBJIHRoaW5rIHdlIG1h eQ0KPiA+IHRvdGFsbHkgcmVtb3ZlIHRoaXMgbGlzdC4gRm9yIHRoZXNlIGRheXMsIHRoaXMgbGlz dCBwcm9iYWJseSBoYXMgbmV2ZXINCj4gPiBvdmVyZmxvd2VkIGJ1dCBsaXRlcmFsbHkgdGhpcyBj b3VsZCBoYXBwZW4uDQo+ID4NCj4gPiB0aG91Z2h0cz8NCj4gDQo+IEZyb20gd2hhdCBHcmVnIHNh aWQsIGl0IHNvdW5kcyBsaWtlIHJlbW92aW5nIHRoZSBCVUlMRF9CVUdfT04oKSwgbWFraW5nDQo+ IGl0IGEgYmluYXJ5IHN5c2ZzIGZpbGUsIGFuZCBtYWtpbmcgaXQgc3VwcG9ydCBhcmJpdHJhcnkg bGVuZ3RocyBpcyB0aGUNCj4gd2F5IHRvIGdvLg0KDQpJIGFtIGFjdHVhbGx5IG1vcmUgY29uY2Vy bmVkIG9uIHh4eF9jcHVzX2xpc3QgdGhhbiB4eHhfY3B1cy4NCg0KeHh4X2NwdXMgaGFzIG5ldmVy IG92ZXJmbG93ZWQuIFRob3VnaCB0aGVyZSBpcyBhIEJVSUxEX0JVR19PTigpLCBidXQgdGhlDQpt YXhpbXVtIE5SX0NQVVMgaXMgODA5NiwgaXQgaXMgc3RpbGwgZmFyIGZyb20gb3ZlcmZsb3cuDQo4 MDk2IC8zMiAqIDkgPSAyMjc3DQphcyAyMjc3IDwgNDA5Ng0KDQpXaGlsZSBOUl9DUFVTIGdldHMg dG8gfjE0NTAwLCBmb3IgYSA0S0IgcGFnZSwgeHh4X2NwdXMgd2lsbCBvdmVyZmxvdy4NCkJ1dCBJ IGRvbid0IGtub3cgd2hlbiBoYXJkd2FyZSB3aWxsIHJlYWNoIHRoZXJlLiBJZiB3ZSByZWFjaCB0 aGVyZSwNCnRoZSBleGlzdGluZyBjb2RlIHRvIGRlc2NyaWJlIHRvcG9sb2d5IGFuZCBzY2hlZHVs ZSB0YXNrcyBtaWdodCBhbHNvDQpuZWVkIHJld29yay4NCg0KT24gdGhlIG90aGVyIGhhbmQsIGxz Y3B1LCBod2xvYywgbnVtYWN0bCBldGMgYXJlIHVzaW5nIHRoZSBleGlzdGluZw0KaGV4IGJpdG1h cCBBQkk6DQoNCiQgc3RyYWNlIGxzY3B1ICAyPiYxIHwgZ3JlcCB0b3BvbG9neQ0KZmFjY2Vzc2F0 KEFUX0ZEQ1dELA0KIi9zeXMvZGV2aWNlcy9zeXN0ZW0vY3B1L2NwdTAvdG9wb2xvZ3kvdGhyZWFk X3NpYmxpbmdzIiwgRl9PSykgPSAwDQpvcGVuYXQoQVRfRkRDV0QsDQoiL3N5cy9kZXZpY2VzL3N5 c3RlbS9jcHUvY3B1MC90b3BvbG9neS90aHJlYWRfc2libGluZ3MiLA0KT19SRE9OTFl8T19DTE9F WEVDKSA9IDMNCm9wZW5hdChBVF9GRENXRCwNCiIvc3lzL2RldmljZXMvc3lzdGVtL2NwdS9jcHUw L3RvcG9sb2d5L2NvcmVfc2libGluZ3MiLA0KT19SRE9OTFl8T19DTE9FWEVDKSA9IDMNCmZhY2Nl c3NhdChBVF9GRENXRCwNCiIvc3lzL2RldmljZXMvc3lzdGVtL2NwdS9jcHUwL3RvcG9sb2d5L2Jv b2tfc2libGluZ3MiLCBGX09LKSA9IC0xDQpFTk9FTlQgKE5vIHN1Y2ggZmlsZSBvciBkaXJlY3Rv cnkpDQpmYWNjZXNzYXQoQVRfRkRDV0QsDQoiL3N5cy9kZXZpY2VzL3N5c3RlbS9jcHUvY3B1MS90 b3BvbG9neS90aHJlYWRfc2libGluZ3MiLCBGX09LKSA9IDANCm9wZW5hdChBVF9GRENXRCwNCi4u Lg0KDQokIHN0cmFjZSBudW1hY3RsIC0taGFyZHdhcmUgIDI+JjEgfCBncmVwIGNwdQ0Kb3BlbmF0 KEFUX0ZEQ1dELCAiL3N5cy9kZXZpY2VzL3N5c3RlbS9jcHUiLA0KT19SRE9OTFl8T19OT05CTE9D S3xPX0RJUkVDVE9SWXxPX0NMT0VYRUMpID0gMw0Kb3BlbmF0KEFUX0ZEQ1dELCAiL3N5cy9kZXZp Y2VzL3N5c3RlbS9ub2RlL25vZGUwL2NwdW1hcCIsIE9fUkRPTkxZKSA9IDMNCm9wZW5hdChBVF9G RENXRCwgIi9zeXMvZGV2aWNlcy9zeXN0ZW0vbm9kZS9ub2RlMS9jcHVtYXAiLCBPX1JET05MWSkg PSAzDQpvcGVuYXQoQVRfRkRDV0QsICIvc3lzL2RldmljZXMvc3lzdGVtL25vZGUvbm9kZTIvY3B1 bWFwIiwgT19SRE9OTFkpID0gMw0Kb3BlbmF0KEFUX0ZEQ1dELCAiL3N5cy9kZXZpY2VzL3N5c3Rl bS9ub2RlL25vZGUzL2NwdW1hcCIsIE9fUkRPTkxZKSA9IDMNCg0KSWYgd2UgbW92ZSB0byBiaW5h cnksIGl0IG1lYW5zIHdlIGhhdmUgdG8gY2hhbmdlIHRob3NlIGFwcGxpY2F0aW9ucy4NCg0KRm9y IHRoaXMgbW9tZW50LCBJJ2QgYXJndWUgd2Uga2VlcCBjcHUgYml0bWFwIEFCSSBhcyBpcyBhbmQg ZGVmZXIgdGhpcw0KaXNzdWUgdG8gd2hlbiB3ZSByZWFsbHkgZ2V0IHNvIG1hbnkgY29yZXMuDQoN ClRoYW5rcw0KQmFycnkNCg==