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Fri, 20 Nov 2020 03:11:12 +0000 From: Rahul Gopakumar To: "bhe@redhat.com" CC: "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , "akpm@linux-foundation.org" , "natechancellor@gmail.com" , "ndesaulniers@google.com" , "clang-built-linux@googlegroups.com" , "rostedt@goodmis.org" , Rajender M , Yiu Cho Lau , Peter Jonasson , Venkatesh Rajaram Subject: Re: Performance regressions in "boot_time" tests in Linux 5.8 Kernel Thread-Topic: Performance regressions in "boot_time" tests in Linux 5.8 Kernel Thread-Index: AQHWnjk5ihPzOwsVE02I7/jG5KTBz6mQW+kAgAPEkzyAAWl/gIALAETTgAAhwwCAAAD7T4ACZ34AgADZzMiAEREnqIAADZOAgAFrvxuADlGAgIALzC/8 Date: Fri, 20 Nov 2020 03:11:11 +0000 Message-ID: References: <20201013131735.GL25604@MiWiFi-R3L-srv> <20201020151814.GU25604@MiWiFi-R3L-srv> <20201022040440.GX25604@MiWiFi-R3L-srv> <20201102143035.GA3177@MiWiFi-R3L-srv> ,<20201112145149.GN8486@MiWiFi-R3L-srv> In-Reply-To: <20201112145149.GN8486@MiWiFi-R3L-srv> Accept-Language: en-GB, en-US Content-Language: en-GB X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: redhat.com; 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x-ms-exchange-antispam-messagedata: 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 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: vmware.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: DM6PR05MB5292.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 4c97b079-e3cf-4b54-4346-08d88d01ef41 X-MS-Exchange-CrossTenant-originalarrivaltime: 20 Nov 2020 03:11:12.0511 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: b39138ca-3cee-4b4a-a4d6-cd83d9dd62f0 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: 2dL3vSEbpmZKiZV7CdtO3dd72ejHkwc4OZjyapq6+AJHQvtSMFDaCojAw9OnvhPT6HbweYp2d52YKPsBMTTDrw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR0501MB3719 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Baoquan,=0A= =0A= To which commit should we apply the draft patch. We tried applying=0A= the patch to the commit 3e4fb4346c781068610d03c12b16c0cfb0fd24a3=0A= (the one we used for applying the previous patch) but it fails.=0A= =0A= =0A= From: bhe@redhat.com =0A= Sent: 12 November 2020 8:21 PM=0A= To: Rahul Gopakumar =0A= Cc: linux-mm@kvack.org ; linux-kernel@vger.kernel.org <= linux-kernel@vger.kernel.org>; akpm@linux-foundation.org ; natechancellor@gmail.com ; ndesaulnier= s@google.com ; clang-built-linux@googlegroups.com = ; rostedt@goodmis.org ; Rajender M ; Yiu Cho Lau ; Pet= er Jonasson ; Venkatesh Rajaram = =0A= Subject: Re: Performance regressions in "boot_time" tests in Linux 5.8 Kern= el =0A= =A0=0A= On 11/03/20 at 12:34pm, Rahul Gopakumar wrote:=0A= > >> So, you mean with the draft patch applied, the initial performance=0A= > regression goes away, just many page corruption errors with call trace=0A= > are seen, right?=0A= > =0A= > Yes, that's right.=0A= > =0A= > >> And the performance regression is about 2sec delay in=0A= > your system?=0A= > =0A= > The delay due to this new page corruption issue is about=0A= > 3 secs.=0A= > =0A= > Here is the summary=0A= > =0A= > * Initial problem - 2 secs=0A= > * Draft patch - Fixes initial problem (recovers 2 secs) but=0A= > brings in new page corruption issue (3 secs)=0A= > =0A= > >> Could you tell how you setup vmware VM so that I can ask our QA for=0A= > help to create a vmware VM for me to test?=0A= > =0A= > * Use vSphere ESXi 6.7 or 7.0 GA.=0A= > * Create VM using vSphere Web Client and specify 1TB VM Memory.=0A= > * Install RHEL 8.1, that's the guest used in this test.=0A= =0A= Can you try the attached draft patch?=0A= =0A= > =0A= > With draft patch, you should be able to reproduce the issue.=0A= > Let me know if you need more details.=0A= 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=-5.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 7B232C63697 for ; 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Fri, 20 Nov 2020 03:11:12 +0000 Received: from DM6PR05MB5292.namprd05.prod.outlook.com ([fe80::fc60:3dd5:354e:e146]) by DM6PR05MB5292.namprd05.prod.outlook.com ([fe80::fc60:3dd5:354e:e146%7]) with mapi id 15.20.3589.016; Fri, 20 Nov 2020 03:11:12 +0000 From: Rahul Gopakumar To: "bhe@redhat.com" CC: "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , "akpm@linux-foundation.org" , "natechancellor@gmail.com" , "ndesaulniers@google.com" , "clang-built-linux@googlegroups.com" , "rostedt@goodmis.org" , Rajender M , Yiu Cho Lau , Peter Jonasson , Venkatesh Rajaram Subject: Re: Performance regressions in "boot_time" tests in Linux 5.8 Kernel Thread-Topic: Performance regressions in "boot_time" tests in Linux 5.8 Kernel Thread-Index: AQHWnjk5ihPzOwsVE02I7/jG5KTBz6mQW+kAgAPEkzyAAWl/gIALAETTgAAhwwCAAAD7T4ACZ34AgADZzMiAEREnqIAADZOAgAFrvxuADlGAgIALzC/8 Date: Fri, 20 Nov 2020 03:11:11 +0000 Message-ID: References: <20201013131735.GL25604@MiWiFi-R3L-srv> <20201020151814.GU25604@MiWiFi-R3L-srv> <20201022040440.GX25604@MiWiFi-R3L-srv> <20201102143035.GA3177@MiWiFi-R3L-srv> ,<20201112145149.GN8486@MiWiFi-R3L-srv> In-Reply-To: <20201112145149.GN8486@MiWiFi-R3L-srv> Accept-Language: en-GB, en-US Content-Language: en-GB X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: redhat.com; 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x-ms-exchange-antispam-messagedata: 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 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: vmware.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: DM6PR05MB5292.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 4c97b079-e3cf-4b54-4346-08d88d01ef41 X-MS-Exchange-CrossTenant-originalarrivaltime: 20 Nov 2020 03:11:12.0511 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: b39138ca-3cee-4b4a-a4d6-cd83d9dd62f0 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: 2dL3vSEbpmZKiZV7CdtO3dd72ejHkwc4OZjyapq6+AJHQvtSMFDaCojAw9OnvhPT6HbweYp2d52YKPsBMTTDrw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR0501MB3719 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Hi Baoquan,=0A= =0A= To which commit should we apply the draft patch. We tried applying=0A= the patch to the commit 3e4fb4346c781068610d03c12b16c0cfb0fd24a3=0A= (the one we used for applying the previous patch) but it fails.=0A= =0A= =0A= From: bhe@redhat.com =0A= Sent: 12 November 2020 8:21 PM=0A= To: Rahul Gopakumar =0A= Cc: linux-mm@kvack.org ; linux-kernel@vger.kernel.org <= linux-kernel@vger.kernel.org>; akpm@linux-foundation.org ; natechancellor@gmail.com ; ndesaulnier= s@google.com ; clang-built-linux@googlegroups.com = ; rostedt@goodmis.org ; Rajender M ; Yiu Cho Lau ; Pet= er Jonasson ; Venkatesh Rajaram = =0A= Subject: Re: Performance regressions in "boot_time" tests in Linux 5.8 Kern= el =0A= =A0=0A= On 11/03/20 at 12:34pm, Rahul Gopakumar wrote:=0A= > >> So, you mean with the draft patch applied, the initial performance=0A= > regression goes away, just many page corruption errors with call trace=0A= > are seen, right?=0A= > =0A= > Yes, that's right.=0A= > =0A= > >> And the performance regression is about 2sec delay in=0A= > your system?=0A= > =0A= > The delay due to this new page corruption issue is about=0A= > 3 secs.=0A= > =0A= > Here is the summary=0A= > =0A= > * Initial problem - 2 secs=0A= > * Draft patch - Fixes initial problem (recovers 2 secs) but=0A= > brings in new page corruption issue (3 secs)=0A= > =0A= > >> Could you tell how you setup vmware VM so that I can ask our QA for=0A= > help to create a vmware VM for me to test?=0A= > =0A= > * Use vSphere ESXi 6.7 or 7.0 GA.=0A= > * Create VM using vSphere Web Client and specify 1TB VM Memory.=0A= > * Install RHEL 8.1, that's the guest used in this test.=0A= =0A= Can you try the attached draft patch?=0A= =0A= > =0A= > With draft patch, you should be able to reproduce the issue.=0A= > Let me know if you need more details.=0A=