From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from SN4PR2101CU001.outbound.protection.outlook.com (mail-southcentralusazon11012055.outbound.protection.outlook.com [40.93.195.55]) (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 AF6EC410D3D for ; Tue, 13 Oct 2026 10:44:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.93.195.55 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791888250; cv=fail; b=RrEYiGbkfcKIOF2Jaw86RvTi3H/G9mGkjeYbmNbD1iaUky0h4O+jKM4cYTuhSeMqHSE2FNFE36g+3mL9FPFM6/kvaJ4xLu8r81JDU23PNotdWSx/5u5U6A1+wNrWzuashtqahX+1tUdYKvJZKSrpCuy8Sixf+fbDzwMrYc+vjyc= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791888250; c=relaxed/simple; bh=stK4izEH/47aroJhAy3CtIT9kt88mL6gTKqDDFWSmQU=; h=Message-ID:Date:MIME-Version:Subject:To:CC:References:From: In-Reply-To:Content-Type; b=j5lJOusl4H5zhEg3okNXXZDEpZ9N/VEZH8TfZuLmi721ZCnpDHGYoMz1ijxNsDQKCJ5gh+0H+LCVEX9iw8rugdw68Yuf1psMMz7KQu4Veqv89j880r6wx1SyWH98+NGdPdNxINrm+7SuK8P1ZyF2sG8eiLlWPZH6Y/h+UZBfZpA= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amd.com; spf=fail smtp.mailfrom=amd.com; dkim=pass (1024-bit key) header.d=amd.com header.i=@amd.com header.b=CX/EHeJR; arc=fail smtp.client-ip=40.93.195.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amd.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=amd.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=amd.com header.i=@amd.com header.b="CX/EHeJR" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=HIGaAQNSHcoHD3g0L74cBQg1u9DJVaGAd0Gy1VyVIkU31ZyP0yrFysa3flSVYAKZH/hxPM9qrc+etoK4FurS9HuJbTnJUCBsOrTgk/NZly2IRLkLL1vCPDva+EIlJNtFb/vxDDbwUe/HIhO9BQiKu/+5y7JpsZJUR8ClnlQf9w7kpEgycOnQvZCoGc5q7uyhMDnQX0+D3wFRtxB11SDDInbADrq48O1fvHeelTZ1xJpYaJgXugkLPcJpzLq0vqordxG3yte61B2Zq+SE5acZ+bmBapIy5nq2KJwgiiIVV3+ebRsP63elBL3JDRdMyhOX1Iys83IvIKWgouu4NHQPMA== 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=tmZglyBHhmfjJff4fItJV8SKm8HCTUnOUkCEnj50z+s=; b=qwd0bHCwwo2uyf0uynjjumiC0eqXBx8/q56g1FMG1X11JGwDzCxuDrs/Dshl88Qi4sxCCO4/xEP/cBF0r0w7lQOZFklhdlxSsG0w/zcLUmvAELPi9/iRFyjmNmZS6BVUCWxy0zna+GDbojg8saoCkJhp4cp8bDf8kazt80fHO/HbQGjLXfAesGC8u0n+sJp2T0XnVPrUccSA/HSebj8nCvMBDWTWPbhKm+d03GCGpD3SrcDNI/wdw1sG5n12x6mCzFab+XHPDBXa3DFGJ/HhOY0eDqrT++YT8hhl34OvgaYG75qGh2Lm0T1NYebt0Cb+awYywYtWOMLzlYtn2/x5Aw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=infradead.org smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none (0) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=tmZglyBHhmfjJff4fItJV8SKm8HCTUnOUkCEnj50z+s=; b=CX/EHeJRTpru0P7etaSiiDU1xbDdkkkhXmrKiJ0qy2ogx0Wk8yvnqcbLOfaBFnQ1jtq+hXvyFp4b2AvA5fdsbqVcr26vmyGIybGf0xRtBMZVccnUfzfyCsV+s+oy5k/7t2sduO6zWmVmVBjdZKslxvw3rdHAMUOm4Dnq2e8wccc= Received: from DS7PR03CA0153.namprd03.prod.outlook.com (2603:10b6:5:3b2::8) by MN0PR12MB5763.namprd12.prod.outlook.com (2603:10b6:208:376::8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.496.23; Tue, 13 Oct 2026 10:44:04 +0000 Received: from DS1PEPF00053452.namprd04.prod.outlook.com (2603:10b6:5:3b2:cafe::d) by DS7PR03CA0153.outlook.office365.com (2603:10b6:5:3b2::8) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.21.496.5 via Frontend Transport; Tue, 13 Oct 2026 10:44:04 +0000 X-MS-Exchange-Authentication-Results: mx.microsoft.com 1; spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=satlexmb08.amd.com; pr=C Received: from satlexmb08.amd.com (165.204.84.17) by DS1PEPF00053452.mail.protection.outlook.com (10.167.23.234) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.522.6 via Frontend Transport; Tue, 13 Oct 2026 10:44:04 +0000 Received: from satlexmb10.amd.com (10.181.42.219) by satlexmb08.amd.com (10.181.42.217) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.53; Tue, 13 Oct 2026 05:43:58 -0500 Received: from satlexmb08.amd.com (10.181.42.217) by satlexmb10.amd.com (10.181.42.219) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.53; Tue, 13 Oct 2026 05:43:58 -0500 Received: from [10.136.45.168] (10.180.168.240) by satlexmb08.amd.com (10.181.42.217) with Microsoft SMTP Server id 15.2.2562.53 via Frontend Transport; Tue, 13 Oct 2026 05:43:54 -0500 Message-ID: Date: Tue, 13 Oct 2026 16:13:53 +0530 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [BUG] Apparent lost wakeups To: Peter Zijlstra CC: Vincent Guittot , , "Ingo Molnar" , Juri Lelli , "Dietmar Eggemann" , Steven Rostedt , Ben Segall , Mel Gorman , "Valentin Schneider" , Joel Fernandes , , References: <8fa7f795-518c-4507-b684-60b0c1cac2c5@paulmck-laptop> <69622916-cc8a-44d5-b776-6e25f79aceda@amd.com> <20261013101452.GG2009045@noisy.programming.kicks-ass.net> <20261013103726.GY4121339@noisy.programming.kicks-ass.net> Content-Language: en-US From: K Prateek Nayak In-Reply-To: <20261013103726.GY4121339@noisy.programming.kicks-ass.net> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS1PEPF00053452:EE_|MN0PR12MB5763:EE_ X-MS-Office365-Filtering-Correlation-Id: 506281ea-ebcf-4eef-f96b-08df2916e66c X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|36860700016|376014|7416014|82310400026|23010399003|56012099006|11063799006|4143699003|10067099003|22082099003|18002099003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:satlexmb08.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(1800799024)(36860700016)(376014)(7416014)(82310400026)(23010399003)(56012099006)(11063799006)(4143699003)(10067099003)(22082099003)(18002099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: V8BXLr9H70V5OE7acgrloWkq6yWAkI9PlPZPmdfHNWaSGRZTJrYnAcOuK/NXBKeajNY/7sN+f9y1iAm3n8GfcBU+Zx3mQUe5oJAJ0VwGA0VPMLVWOqQeaFAr/eRUNSh5T+vygrTVnl+kBkpJZ8S7dXqu/Fgi+zPF/y3ZtADb+DALF/iwQNVI92aqUHuFx+WMspgRttwAIHVhqTUd1rdJlV6hTwO5HhLY6YJo+WObN6gJtksB+9U6z7wmLNnxn3Fb/i/QvdhObIOpaTnmDO+NRXcSsFa1UkUM04viwAUjj8t4ZSEFewZdEBuIyiITwpqi2yeAxCYCiasxoY++qgQCGZow+040CVM+yPsI8MvEbLzqZoHjbLj4pOVErH+ALckvqjokmtR4sldScprFXeWu1lU/ugrMei/osnNNTvDWsGzUBnVm9LQQFN1nQxekV46g X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Oct 2026 10:44:04.1100 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 506281ea-ebcf-4eef-f96b-08df2916e66c X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[satlexmb08.amd.com] X-MS-Exchange-CrossTenant-AuthSource: DS1PEPF00053452.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN0PR12MB5763 On 10/13/2026 4:07 PM, Peter Zijlstra wrote: > Can you turn all this into a nice patch -- you've done all the hard work > on it anyway. Sure! I'll run TREE01 for sanity on my end and send the patch out later in the evening. Should give Paul some time to test and confirm that we are seeing the same issue :-) -- Thanks and Regards, Prateek