From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on archive.lwn.net X-Spam-Level: X-Spam-Status: No, score=-6.0 required=5.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham autolearn_force=no version=3.4.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by archive.lwn.net (Postfix) with ESMTP id 4C7997D089 for ; Wed, 26 Dec 2018 17:15:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727133AbeLZRPW (ORCPT ); Wed, 26 Dec 2018 12:15:22 -0500 Received: from mail-eopbgr810083.outbound.protection.outlook.com ([40.107.81.83]:12265 "EHLO NAM01-BY2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726930AbeLZRPW (ORCPT ); Wed, 26 Dec 2018 12:15:22 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amdcloud.onmicrosoft.com; s=selector1-amd-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=k4IrV9ztFjcQ/Uei9PBUsRnFyQR+/yhl5tJBcEUGYRU=; b=JUlEx5ozQAT8spxUEe1CZ6Tbhl5jXTCeUhlz0zR5CtLaBeEebaf8Fm90GIoza2h4iTBf8q9tN3dEgwTi4NMNuCqNRFQRgaoqVFmiHsAyhsPJMjBO1zP0++t21txYMKbKIDL2cJCZvdjR99R8yKuN8rhr6r+blxW9Dv8K8w+/Qn0= Received: from DM5PR12MB2471.namprd12.prod.outlook.com (52.132.141.138) by DM5PR12MB1242.namprd12.prod.outlook.com (10.168.237.21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.1446.23; Wed, 26 Dec 2018 17:14:37 +0000 Received: from DM5PR12MB2471.namprd12.prod.outlook.com ([fe80::d834:acdd:3c8c:42ad]) by DM5PR12MB2471.namprd12.prod.outlook.com ([fe80::d834:acdd:3c8c:42ad%6]) with mapi id 15.20.1471.019; Wed, 26 Dec 2018 17:14:37 +0000 From: "Moger, Babu" To: Jan Engelhardt CC: "tglx@linutronix.de" , "mingo@redhat.com" , "bp@alien8.de" , "corbet@lwn.net" , "fenghua.yu@intel.com" , "reinette.chatre@intel.com" , "peterz@infradead.org" , "gregkh@linuxfoundation.org" , "davem@davemloft.net" , "akpm@linux-foundation.org" , "hpa@zytor.com" , "x86@kernel.org" , "mchehab+samsung@kernel.org" , "arnd@arndb.de" , "kstewart@linuxfoundation.org" , "pombredanne@nexb.com" , "rafael@kernel.org" , "kirill.shutemov@linux.intel.com" , "tony.luck@intel.com" , "qianyue.zj@alibaba-inc.com" , "xiaochen.shen@intel.com" , "pbonzini@redhat.com" , "Singh, Brijesh" , "Hurwitz, Sherry" , "dwmw2@infradead.org" , "Lendacky, Thomas" , "luto@kernel.org" , "joro@8bytes.org" , "jannh@google.com" , "vkuznets@redhat.com" , "rian@alum.mit.edu" , "jpoimboe@redhat.com" , "linux-kernel@vger.kernel.org" , "linux-doc@vger.kernel.org" Subject: RE: [PATCH v9 00/13] arch/resctrl: AMD QoS support Thread-Topic: [PATCH v9 00/13] arch/resctrl: AMD QoS support Thread-Index: AQHUmu0t+YNKxJRPgUK0jeaapDvMZ6WRRxWA Date: Wed, 26 Dec 2018 17:14:37 +0000 Message-ID: <6f3fa819-b126-258b-96c4-44cccb80febd@amd.com> References: <20181121202811.4492-2-babu.moger@amd.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: SN4PR0201CA0016.namprd02.prod.outlook.com (2603:10b6:803:2b::26) To DM5PR12MB2471.namprd12.prod.outlook.com (2603:10b6:4:b5::10) authentication-results: spf=none (sender IP is ) smtp.mailfrom=Babu.Moger@amd.com; x-ms-exchange-messagesentrepresentingtype: 1 x-originating-ip: [165.204.78.1] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;DM5PR12MB1242;20:GYWj2vL+itV2fL9BgIEJg6npq6VVoGx1Iq+siajjhHeEUFvxoGC4XI00PyD7TshV5159YM7E+WPpItQvD4z3TghHo1Y0Uh/l/87UOztTmrzvD02XD2R0Jb9IrtKG/UiAsLXcWoh/RpmHJkq8TYS914OWnVfAfW37nIONpCEGrHuC7VR7b2kiOjnkKk+sYX0NKZ3wutCJ16B5RdG8f8IjlgT3P3R+3R30A9BItmsk/yTbfvqou3ZNhwgrVJe95Psw x-ms-office365-filtering-correlation-id: 5274e626-1949-4999-e2c6-08d66b559d07 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0;PCL:0;RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600074)(711020)(4618075)(2017052603328)(7153060)(7193020);SRVR:DM5PR12MB1242; x-ms-traffictypediagnostic: DM5PR12MB1242: x-microsoft-antispam-prvs: x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(8211001083)(3230021)(908002)(999002)(5005026)(6040522)(2401047)(8121501046)(10201501046)(3002001)(3231475)(944501520)(52105112)(93006095)(93001095)(6055026)(6041310)(201703131423095)(201702281528075)(20161123555045)(201703061421075)(201703061406153)(20161123564045)(20161123562045)(20161123560045)(20161123558120)(201708071742011)(7699051)(76991095);SRVR:DM5PR12MB1242;BCL:0;PCL:0;RULEID:;SRVR:DM5PR12MB1242; x-forefront-prvs: 0898A6E028 x-forefront-antispam-report: SFV:NSPM;SFS:(10009020)(396003)(346002)(376002)(39860400002)(136003)(366004)(13464003)(189003)(199004)(6916009)(71200400001)(256004)(71190400001)(446003)(66066001)(8676002)(81156014)(14454004)(486006)(81166006)(11346002)(478600001)(72206003)(476003)(68736007)(316002)(2616005)(54906003)(31696002)(86362001)(8936002)(229853002)(305945005)(99286004)(97736004)(2906002)(3846002)(26005)(6116002)(102836004)(6506007)(386003)(53546011)(31686004)(186003)(6486002)(36756003)(52116002)(76176011)(53936002)(25786009)(7736002)(7416002)(7406005)(5660300001)(105586002)(6246003)(6512007)(6436002)(4326008)(106356001);DIR:OUT;SFP:1101;SCL:1;SRVR:DM5PR12MB1242;H:DM5PR12MB2471.namprd12.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;MX:1;A:1; received-spf: None (protection.outlook.com: amd.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: eAf1VnA/AgzTD1ZqdpHjDJycy8r2K0w17iOn/E9grBwizkSmrXOIjM0MyDGpl1q+cCM13hlrn6pBPaPFoCRjM8TiflfKVrdaE2Y5CpAKvsbARtWWDp1QLU2bQnXgOMC0Vhs812toVyUddKXGeEr51xZb5gx0obs5/WvcYzAwSwsjtuu2DJMDvC9edpk5PZI+5WipKS+FB8TiDg1fD9KKPzecnqQQnHI3qxpw30jl7CAV+BNqt4Ntgf2bwUus8zVM917i4pOgTKkbaqZZZakjQoJ39iX7tTapNkaaXoYjODdfKQTT2zh174U7gSZdNZhl spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="Windows-1252" Content-ID: Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: 5274e626-1949-4999-e2c6-08d66b559d07 X-MS-Exchange-CrossTenant-originalarrivaltime: 26 Dec 2018 17:14:37.3888 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR12MB1242 Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org Hi Jan, > -----Original Message----- > From: Jan Engelhardt > Sent: Sunday, December 23, 2018 12:27 PM > To: Moger, Babu > Cc: tglx@linutronix.de; mingo@redhat.com; bp@alien8.de; corbet@lwn.net; > fenghua.yu@intel.com; reinette.chatre@intel.com; peterz@infradead.org; > gregkh@linuxfoundation.org; davem@davemloft.net; akpm@linux- > foundation.org; hpa@zytor.com; x86@kernel.org; > mchehab+samsung@kernel.org; arnd@arndb.de; > kstewart@linuxfoundation.org; pombredanne@nexb.com; > rafael@kernel.org; kirill.shutemov@linux.intel.com; tony.luck@intel.com; > qianyue.zj@alibaba-inc.com; xiaochen.shen@intel.com; > pbonzini@redhat.com; Singh, Brijesh ; Hurwitz, > Sherry ; dwmw2@infradead.org; Lendacky, > Thomas ; luto@kernel.org; joro@8bytes.org; > jannh@google.com; vkuznets@redhat.com; rian@alum.mit.edu; > jpoimboe@redhat.com; linux-kernel@vger.kernel.org; linux- > doc@vger.kernel.org > Subject: Re: [PATCH v9 00/13] arch/resctrl: AMD QoS support >=20 >=20 > On Nov 21 2018 20:28:23, Moger, Babu wrote: > > > >This series adds support for AMD64 architectural extensions for > >Platform Quality of Service. >=20 > The term "QoS" is already used for net/sched/. It will be bad naming to > have QoS - and then an AMD QoS / Platform QoS as well. Preexisting, > decade-old howtos may speak of enabling "QoS", and with the ambiguity, > the unsuspecting kernel builder apprentice may enable the wrong thing in > his config. >=20 > So either the QoS from networking gets correspondingly renamed ("packet > QoS"?.. or something), or else AMD QoS should be changed. The QoS name is not visible to the user. This feature is referred as QoS in AMD documents. But for the kernel user it is called as RESCTRL which we agreed upon in our earlier discussions. So there is no ambiguity or confusion here. Let me know if you have any questions.