From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from BN8PR05CU002.outbound.protection.outlook.com (mail-eastus2azon11011060.outbound.protection.outlook.com [52.101.57.60]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 559563F9A0D for ; Fri, 24 Jul 2026 22:07:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=52.101.57.60 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784930854; cv=fail; b=f66sK2FJwD45ex0HsXXoKNg7zhJNS6E8AE42E+D4aJjH0rl8LCU/26rEtQ22Pk80ubHDXnXIBlYIiATYjWmR0rcYbKeCa70DjNlK/5IGAHQSgiDabnsdAKfDIVUzfegM/U1x+nHPw+sHhBk9i3cT7hGSkFn7rC5VxamhREURLWY= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784930854; c=relaxed/simple; bh=Iu+UHI6vvlOpt5/GSm5SKDDagAUgy33SwMyyznMHLEU=; h=Date:From:To:Cc:Subject:Message-ID:References:Content-Type: Content-Disposition:In-Reply-To:MIME-Version; b=Ejmt0DRsW/i87VYP6s1lSwYDYDmBOH3867mtr9Uff26KBExXzacNnsjsr2u3NKfN0PBBXmS25O/j08y/EnfWcCQ0sUhSTH6IJVtJjbNydvciSklFOsBAru0utPbhPUHpF/VPYX4ii08doxnLRtLJaGO6JfunWcma4M3hxeyvnS8= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=nvidia.com; spf=fail smtp.mailfrom=nvidia.com; dkim=pass (2048-bit key) header.d=Nvidia.com header.i=@Nvidia.com header.b=bR8/P7Kt; arc=fail smtp.client-ip=52.101.57.60 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=nvidia.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=nvidia.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=Nvidia.com header.i=@Nvidia.com header.b="bR8/P7Kt" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=qxoNas46v6TkuYGaktSiuK7jImvjqTwL5ETtRvLT2ighfscPXekKpGZ5Pld/jXANJylqnlEvhkg3ugfo1/5cFvQzlmO2GsbITaGEiDo0xTjRTd8QDMF4F2C2pFQa8esIBkyxw7Mbi09dg8sAbEJLLPssnGWNyKA1dTeG/OX1p9HsH0iqqGH5jiCmm2DcD5WEJ8ye5cGQUwcMf+StlRjFZWOjTA+A0cyOUQsexyyH4+sXspZ+6sIOzmbW4GqDzyoK2lLQ+me3+GKMEvo9E8VWvxEGe8Sxgm9Kc/3fNzNoBHvUD7iL1XoM3WUg2J+AZXVUeHhuboc9LPZu18nRBoxOXA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=Io9YjguiAiZ5xB70z5eAF96IRTCmKgsEoVTp1f2ekwk=; b=cQZo6CeE9zKhDm/RGq+SCp6JZk5GZw8wfQQ7ZaK14CLZatDFQyXgvNaQ7gbPQXazIEaKxtwjPJE2IaZaFp9fkNIYVU7ShIavMB4u7i7F4OxvAIPNxjxoYucljyG2vyRY+st0TsK7g+I7GXZAozCU7MiPV9O0+VWRYxcZlINjmcFMbBD+fO8Wb4pFdQVzUUZFxllyRoR0Tge4ehs4U8iaWtQqWOkhkcCbrs3FPSmZnaKIeaba/Rx6bRLljy7++ebRkXU67jUUQE2oxT9YKnh3FDHKu9+iyy9wvxStAjp7rGS1WeqUEnwPpkpxQt0aLfUiSGLGomRGcxEAmsZvEz5eDw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nvidia.com; dmarc=pass action=none header.from=nvidia.com; dkim=pass header.d=nvidia.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=Io9YjguiAiZ5xB70z5eAF96IRTCmKgsEoVTp1f2ekwk=; b=bR8/P7KtUzEILNhDTzAQaS6nOyKOB/XwPPyblPIoh50qFvfC2LMwaQIPzNcl/kv7yvKfWs+rPUoE26h8+fHk3Qzb/5JFpAzfily2lKK6NVeIgTRs3IkckBEVszxFxhOgHNYQvlh5wDucDx4xomPm6D5ejoqt9i7rv6DNjV+ZPhpp3WQ1JZcApuN2Z7zePeWmr9LVNEWlS7Sl3n4QcIjY/LL7POt66G/HZ5R9sgMRv7HKnfLx6aKr9NK1AlBILfm5jjQSIRJqEr4JvlBPE1vUWqqR0TkAuEflET9o1yAv4qLsIHHu2qNxXHgimgUw5EPQStJ+H01iv9+Wm8OZkFQeCQ== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nvidia.com; Received: from LV3PR12MB9356.namprd12.prod.outlook.com (2603:10b6:408:20c::21) by CY5PR12MB6034.namprd12.prod.outlook.com (2603:10b6:930:2e::12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.245.11; Fri, 24 Jul 2026 22:07:26 +0000 Received: from LV3PR12MB9356.namprd12.prod.outlook.com ([fe80::1c36:31b4:c420:6286]) by LV3PR12MB9356.namprd12.prod.outlook.com ([fe80::1c36:31b4:c420:6286%5]) with mapi id 15.21.0245.010; Fri, 24 Jul 2026 22:07:25 +0000 Date: Fri, 24 Jul 2026 18:07:22 -0400 From: Yury Norov To: Shrikanth Hegde Cc: linux-kernel@vger.kernel.org, mingo@kernel.org, peterz@infradead.org, juri.lelli@redhat.com, vincent.guittot@linaro.org, yury.norov@gmail.com, kprateek.nayak@amd.com, iii@linux.ibm.com, corbet@lwn.net, tglx@kernel.org, gregkh@linuxfoundation.org, pbonzini@redhat.com, seanjc@google.com, vschneid@redhat.com, huschle@linux.ibm.com, rostedt@goodmis.org, dietmar.eggemann@arm.com, maddy@linux.ibm.com, srikar@linux.ibm.com, hdanton@sina.com, chleroy@kernel.org, vineeth@bitbyteword.org, frederic@kernel.org, arighi@nvidia.com, pauld@redhat.com, christian.loehle@arm.com, tj@kernel.org, tommaso.cucinotta@gmail.com, maz@kernel.org, rafael@kernel.org, rdunlap@infradead.org, kernellwp@gmail.com, linux-doc@vger.kernel.org, jgross@suse.com, virtualization@lists.linux.dev Subject: Re: [PATCH v9 00/11] sched, steal_governor: Introduce preferred CPUs and steal-driven vCPU backoff Message-ID: References: <20260724140732.2683314-1-sshegde@linux.ibm.com> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260724140732.2683314-1-sshegde@linux.ibm.com> X-ClientProxiedBy: SJ2P221CA0001.NAMP221.PROD.OUTLOOK.COM (2603:10b6:a03:5db::15) To LV3PR12MB9356.namprd12.prod.outlook.com (2603:10b6:408:20c::21) Precedence: bulk X-Mailing-List: virtualization@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LV3PR12MB9356:EE_|CY5PR12MB6034:EE_ X-MS-Office365-Filtering-Correlation-Id: 9d852341-353e-4ce4-6716-08dee9cff1a8 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|7416014|376014|23010399003|366016|18002099003|22082099003|11063799006|56012099006|10067099003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:LV3PR12MB9356.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(1800799024)(7416014)(376014)(23010399003)(366016)(18002099003)(22082099003)(11063799006)(56012099006)(10067099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?y+EihEpHumo6DnxLgNZ7lwO0UADg6uv/zCIgAkH9raviY9MZZXN0cA3vHYUe?= =?us-ascii?Q?6YDCwmEy5by/AxQ7U7680b+/XYZxkCEwmrCWnxJB11tkyv9y2BocIAtHE6Ml?= =?us-ascii?Q?zr8xWDlM/gOiysXjodm3N8Ca2v/EnFT8DdFOhsoanSWPYa0RQjhuDgO3OBqC?= =?us-ascii?Q?UkmoMiETEuDExBjtOG7PMw3Jznceke9UpT6uEE8qZH0BwMj07EhcRuir/YwZ?= =?us-ascii?Q?MJ7De/XxpeEY5C8bXOUzyydI/zt/8jADxT1p/XxUT9aQttLWuJsiReVLMeWF?= =?us-ascii?Q?Wg1tVqjX1OCfRcdWBek94STb7Pzdz9Yi5TN0FlMHNsJiVV63s36DVt8fN1FU?= =?us-ascii?Q?IOGp0zYn3S+B7gdklQZNVLpinKidIyNcNKSRi/ADJkkQp0el0p3EU+1UgN3F?= =?us-ascii?Q?NHHm1bcUxUNzLwRa5ar0+SwAJkjBFqE3qCOYzP1G9YikEkdrWHMxKDpR9H9t?= =?us-ascii?Q?O0UQacmctoWQFE7JSV90Ml9ubp/BSisDL8kYVxDzoGO58zCczthSnEZS6Dnp?= =?us-ascii?Q?Glf36Fx5MmnaGyA5MmenZ/3vM9dbfcKcTmPT7AVH/BUVUxYqq24+A18oPnBw?= =?us-ascii?Q?j01F9fNOLyT0rnj5xHVIkF+22RJqpcXW2Ckc8vfAPlEomg8JdBE1TRV2vNcQ?= =?us-ascii?Q?nQMxJb2o4BoNWPKAOhKd1U0bzYQV8xnnxAMr/Apa0imGDTvqdX5hSxUhzdoE?= =?us-ascii?Q?Ik52MFARVRLfgUAIGdaQ3atJDyNlVf3CRZWGjjNaWdDLnqNMDlwllhlhqdjq?= =?us-ascii?Q?sWg68EUBExrjVnskWhGfznIsbhHQuR+mdrjPsc5Yd49XHYCSMCs/I+1b1Agh?= =?us-ascii?Q?SY/6sWVr0oFKv3IxVqDmZymdRQqvC6xmiZtSGAjMxK2EHMX+CjHc0qF130ok?= =?us-ascii?Q?C6JU7+otKhtXW/+mh5ZejS+U7QK+lLrM2Uu5+TUMJkfWoRdDrsdbJHhpPwmd?= =?us-ascii?Q?uFSEgElx8G5UR5++78Fw37HFQX6mth0dUICXZIlAkpcbIaSihS+8eahCNYzC?= =?us-ascii?Q?0dRli5vvypcXKB6OFJ8Ka7wsUNa2V0q8rR7NfxxrmsBHz2By/tDWSRQZFC6T?= =?us-ascii?Q?roDAq7oD6JMuU+w2bcqNcpk9/IM6EBX0UjTrkN0CjwBIp3LJ/NoIjUW/9kQs?= =?us-ascii?Q?0MO1V8EOOShMAfYWCDeWSH0NxLGfqpDF5lagD8GmPZM7Z4tX8oUEJew8u7hT?= =?us-ascii?Q?xAIipI0Ei0h1ZM12mK0dzdre8VuwKiBsaUESzL+68fR4xz6pqgv3G8CCuMrV?= =?us-ascii?Q?R94q5p8EzfAi3hLSJYFOpcyZRBAHuwzmsZ/p0FW25xmJ1ME6GrY6Ngn1tmhx?= =?us-ascii?Q?hpRocZgi3IK1f41MjExshyxxbECd8Uydh7W7bCG2d2AaGnbw57X/Yh9oMRc6?= =?us-ascii?Q?8927vaBR/oc2l5IaR845pCeIY7idd6n5oa/fM8OYWpjxnauVS7mHBXMPAn1w?= =?us-ascii?Q?afiAXo6Q0pG9OIh7Nmo13jiciA/xJ8gYYJPv/+qTRtLLscGcEJhkXjuftJnf?= =?us-ascii?Q?XGUqdVxvryiG75vvyLYT5qAv5LmcZ+JugFUXQ46205sO0qP0OW56lKhJU9aQ?= =?us-ascii?Q?g8V7lWXMPREU0F9c4HeoKpA6H96mNfFWyiOw8Ckmb0s+2lwi0z8CTbi/q6w3?= =?us-ascii?Q?PUWRxzV3ac8VdgepdJz0hrpaE9PISIX2jkRuvoAifUjrkn7Tkfgx3YS/i4WH?= =?us-ascii?Q?8tv0BGlD2z7dRPmdhUuWufhSVOy8bmUwdImCLAmIJyXDLYa3WoNzeFO9fBAX?= =?us-ascii?Q?+fRAfKn20A=3D=3D?= X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: 9d852341-353e-4ce4-6716-08dee9cff1a8 X-MS-Exchange-CrossTenant-AuthSource: LV3PR12MB9356.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 Jul 2026 22:07:25.6824 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: fZmdYUTObyiVYCDLqY6FcR3ttpVOy22EsuCTrqsq/6wrp67MaC7Ff8gGyFqiap6Vn95fxTMF7iEs56ZWi9+LGA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY5PR12MB6034 On Fri, Jul 24, 2026 at 07:37:21PM +0530, Shrikanth Hegde wrote: > If you have already read v8 cover-letter then see only v8->v9, > everything else is same. :) No, you submitted v9 in just a couple days after v8. Please allow your reviewers more time to read and review the code. Some comments are equally applicable to v8, but because you've already sent this v9, I put them here. Thanks, Yury