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Griffais" , "Fontenot, Nathan" , "Rafael J . Wysocki" , Borislav Petkov , "x86@kernel.org" , "stable@vger.kernel.org" Subject: Re: [PATCH v4] x86, sched: Fix the AMD CPPC maximum perf on some specific generations Message-ID: <20210513104555.GC1621127@hr-amd> References: <20210425073451.2557394-1-ray.huang@amd.com> <20210513042420.GA1621127@hr-amd> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Originating-IP: [165.204.134.251] X-ClientProxiedBy: HKAPR03CA0011.apcprd03.prod.outlook.com (2603:1096:203:c8::16) To MWHPR12MB1248.namprd12.prod.outlook.com (2603:10b6:300:12::21) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from hr-amd (165.204.134.251) by HKAPR03CA0011.apcprd03.prod.outlook.com (2603:1096:203:c8::16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4150.11 via Frontend Transport; Thu, 13 May 2021 10:46:18 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: ba3e9820-14a9-4729-5656-08d915fc5910 X-MS-TrafficTypeDiagnostic: MW3PR12MB4506: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:3513; 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X-MS-Exchange-AntiSpam-MessageData: =?us-ascii?Q?uZDyLgmFaER01cG504GOfTnF1Aw1h1iKpFpTrtPmp2Ew67iBdgwmaCF0mjmT?= =?us-ascii?Q?m+3hwWxcmmfze75IXd8BG036z9KDAXFdgwkSI3UoaH2cnVv/kVRkJtketm4j?= =?us-ascii?Q?Lw8b7sa5b32LZmOt/j+86eFiIZTFvPU8cTUmjtrmBu6yhqTUdP4jnz2F/LiR?= =?us-ascii?Q?LjodPES6NpvqcZIdB6b93Fsf5B5eM8zzb41FJYLGOVoFmQfmryQ63vLkEehT?= =?us-ascii?Q?7JfxkiBRVfjfxYfHHwOHkohcG5vmH4yQwP6c6JrzsFSbXT72Ift0WZJ/09md?= =?us-ascii?Q?j/yaaOUtSOFGaFZxVXpcFfZ9auTRyQht0EqPaSzxWR3E+67dQqWIA9L9ZIgN?= =?us-ascii?Q?fbVUKhi1R/W38qDvEHXE+J1xpDIlxCbkyrBlj2ZXfLc8hhBPDfoRWTL9QQXk?= =?us-ascii?Q?NQq4r98AgCzw2KUn+siPii9gFXzLgms/nhPCssjo9sEufr8Mz0fujyZr5Pi5?= =?us-ascii?Q?z9ZJhwefUPHhKy5jZLPrQwgAz+qlTD8mF0vEwwZO1SKY71CAmqdjAo6o/I9X?= =?us-ascii?Q?Izau1ZDnxo4USsRVNr5StAmHIuotfwqBU1LyOiWJQ1fl5SuDKehUkAiDPB5U?= =?us-ascii?Q?vm4HgRoOopWDMS7iM/kEV4IN72plAqCHbCsbAWWYcdD7TsKpfYPlob/+d14v?= =?us-ascii?Q?eqD4QK3COe3HbG849RJW7rIOd5O1emYTlWLSZowtbSYGmHQ/ElPKOo+aqK+m?= =?us-ascii?Q?TEqZE9gw5nL+UuF9Vhxj5MznkjLBT6e0xFdX9sTvS8dcTvvYLvfdHJe5+B3N?= =?us-ascii?Q?z251RIOJcuSHG0vImuOvhnU5rhBqgUQeA8c6ntc9fcX9nNl7WgR8UDJtYwp3?= =?us-ascii?Q?WZkXb71BJxPVO9RTtypIchjcZyiqD1dzSjC4MMvaJvLdHIQDgywQuuakPpV6?= =?us-ascii?Q?M+WGc13brEZGQyuB9NGKrATChlqx2X0xaMV7ApAzBAnE0DIEF/6NoRnRPlPK?= =?us-ascii?Q?q5xec8wlJo9enCEJv8R7erKm5QTIXjOr0tiKEz9V/ZGAdM6GruLL5b6mE0/k?= =?us-ascii?Q?yovu/czIzfknyB5qmvGjV4Wu2FCoHMG9QVU9FvEGsD76U7aj9SsZFDmhM3C2?= =?us-ascii?Q?uU0HLL98q5NMfc+ZV8m0L2sIVDdRrpmjcP9H3zjM7VE7i7U+EV5QJMGddvOl?= =?us-ascii?Q?NJPxwNqCZgH5imNA90N0tGtk19laZ6IsmtgLNNFOGL03KdT/b4s/NchOVmPj?= =?us-ascii?Q?O3HKe5lwNnPDlHEQd+9+27eKjddr6wTxt6zNuUBXo37HMqwvMJMb5eBbv3ad?= =?us-ascii?Q?+9jyc6Dv/gbV039AbK7PSPX7ve/vSDDPD7uqHaptiD6l+DEvlTPqhFoVrEJk?= =?us-ascii?Q?llKsTnD468TmSZwmUxsUihAT?= X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: ba3e9820-14a9-4729-5656-08d915fc5910 X-MS-Exchange-CrossTenant-AuthSource: MWHPR12MB1248.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 May 2021 10:46:22.1609 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: cbRR80es0vyPkOm6pEaV2lzK+OlpdbakQXT4I1ZSCe1zx1ErwlYA+zbwT/rIz1e5A4KA2h+4TYPG3Qfy3rXwAQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW3PR12MB4506 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org On Thu, May 13, 2021 at 06:39:08PM +0800, Ingo Molnar wrote: > > * Ingo Molnar wrote: > > > No need to send v5, done! > > > > I have a system that appears to be affected by this bug: > > > > kepler:~> lscpu | grep -i mhz > > CPU MHz: 4000.000 > > CPU max MHz: 7140.6250 > > CPU min MHz: 2200.0000 > > > > So I should be able to confirm after a reboot. > > 'CPU max Mhz' seems to be saner now: > > kepler:~> lscpu | grep -i mhz > > CPU MHz: 2200.000 > CPU max MHz: 4917.9678 > CPU min MHz: 2200.0000 > Yes, happy to know this :-) Thanks, Ray