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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EDAAEC28D13 for ; Mon, 22 Aug 2022 07:43:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232085AbiHVHnO (ORCPT ); Mon, 22 Aug 2022 03:43:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60186 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229578AbiHVHnL (ORCPT ); Mon, 22 Aug 2022 03:43:11 -0400 Received: from NAM12-MW2-obe.outbound.protection.outlook.com (mail-mw2nam12on2069.outbound.protection.outlook.com [40.107.244.69]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0D8F82A72B; Mon, 22 Aug 2022 00:43:10 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=GKG5+5WQ7+xfaESbBSoIJRHtr/5WZ8BkTjER4M+Nb+IsKK7LQ7VtnPGhsyqhQueCN2hbEQd7eOFcwvf3zvIkAf1Usxww8Gmf/tW6uxz5Hn1BH8oaZdiV61y9c3QpdvHOqO/ANIiYXBRYVuRHZyWYLY0OsCX+JIvGgbxhfZ3RGaPAUNg4+ghVRkGwKGSbL+c5m4k+bl3g2PX7nguRap4RNHpJugSu50cYlx0kJEChg9fC1lMuyqdTs35+Tq3LHu5xKNj7lmDZNdBh2kG36d3BAYuz5fwIpE3UzpHxNqPM4NqmuWoJQXU/9eKXzHrmpFlkpx5reRgShwXqFoREUJXTVA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; 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=Ojqx0pKaDDZnV7FrfCxdjcQJIAId5CzjhD37hCIBrXw=; b=eEyRtvDroRifPhFfrl3PjlP7iJtZG+fmzTLr5XirvdsfdT37wL0BTQBMGIgabUzdNY/hce4FiokiULFTJtoDkIa3QTAu8fmZRGedN3EOXqioroQNLnZy4rSmqAskX9Q9fqbu8lxR2d7ixeyCGY2A5cTScbyBhEPemkFQoRb3KEo5gftqXagZCYW78ehEx4SHpXuFoXX+t/UdmWwpXjhDM8IvJ6AxcoOZi5neCL+hswoNyu6IJvasCQ3eDhxtustMnpAjcycdwEhfaHNP7WN9lLF6h/EzISTrOVszp7H0hzKO8LMw4knxIWFsG/wzW2KpvmNEqLH4LmnrHhpilBtNAw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=vmware.com; dmarc=pass action=none header.from=vmware.com; dkim=pass header.d=vmware.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=vmware.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=Ojqx0pKaDDZnV7FrfCxdjcQJIAId5CzjhD37hCIBrXw=; b=OgcB99pMXZDDVrQ1JTSsQlETXIsUyV28Taaxouj+6x/y94lRmr9VH0U9u229ghHz1VltxHaawuiPEG6kGDVBwCKO8MMfYxdtlQ8vYdtRktL4A9ZjVppsEgMQks17+iJ7rrQyG4hbZMV9+poH/hIw0MpLQoF63SuaH+flQwtkR2k= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=vmware.com; Received: from SA1PR05MB8311.namprd05.prod.outlook.com (2603:10b6:806:1e2::19) by DM4PR05MB9253.namprd05.prod.outlook.com (2603:10b6:8:8c::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5566.8; Mon, 22 Aug 2022 07:43:08 +0000 Received: from SA1PR05MB8311.namprd05.prod.outlook.com ([fe80::c0a2:3165:1ca9:254d]) by SA1PR05MB8311.namprd05.prod.outlook.com ([fe80::c0a2:3165:1ca9:254d%7]) with mapi id 15.20.5566.014; Mon, 22 Aug 2022 07:43:08 +0000 From: Ankit Jain To: juri.lelli@redhat.com, bristot@redhat.com, l.stach@pengutronix.de, suhui_kernel@163.com, msimmons@redhat.com, peterz@infradead.org, glenn@aurora.tech, stable@vger.kernel.org, linux-kernel@vger.kernel.org, gregkh@linuxfoundation.org Cc: srivatsab@vmware.com, srivatsa@csail.mit.edu, akaher@vmware.com, amakhalov@vmware.com, vsirnapalli@vmware.com, sturlapati@vmware.com, bordoloih@vmware.com, keerthanak@vmware.com, Ankit Jain Subject: [PATCH v5.4.y 0/4] sched/deadline: Fix panic due to nested priority inheritance Date: Mon, 22 Aug 2022 13:09:38 +0530 Message-Id: <20220822073942.218045-1-ankitja@vmware.com> X-Mailer: git-send-email 2.34.1 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-ClientProxiedBy: SJ0PR13CA0183.namprd13.prod.outlook.com (2603:10b6:a03:2c3::8) To SA1PR05MB8311.namprd05.prod.outlook.com (2603:10b6:806:1e2::19) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 2c1ebc11-2a66-471e-5786-08da8411f471 X-MS-TrafficTypeDiagnostic: DM4PR05MB9253:EE_ X-LD-Processed: b39138ca-3cee-4b4a-a4d6-cd83d9dd62f0,ExtAddr X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: RHT89EgkHjFuyMq9pZMWb63hp5Ol8wVmQZMk0Vp07uwbniKM9w9XZ24SY0hKk711VSOsFT3iSL0SvWZcyi9ZMAaSg4oarNgeD9UZ7dCLpezFulVEOwmQJk0ylOkJQQjaUFeAaNfBaAc/VBHEd2hC/1fSjxd3l5fPlRVnoZXylDmws8AzauSY88F1alpX6z/Hy9nFmO/2HyyAqSOQjBwyaJrI1CZc42veJvQHRX6+RT9VEOVTTIGmxImREvZBqRY8R901E4rsA2NLoir7GynrZLPRJ0k6yrxbqJNcg/1+ddzNFeprgq0i1fod3jbraSzyMXuRlGg4nwo/ztsMKqtIL/5XDSTHr5M6JmBRzQC2Jv1GOEZHv4fvtMKTKY0nTt0Dqp/OsqfP1N7pePjktquM3KECmlK9HHOIedwiWVw1q2dszu3TwtE5WqsQSSr9EiFgSR60YloBFLzUg4ceuCiyxPIL++PqBd+U8R3RhhRjXLBfIvIOWXINB7i6OrCcdJleXMZX4ldbijuI7M7BBxMSOvT33PhbJUvmemzWtdYXqlK8wfi0dpD9lB1oMMRK+8EC1PnJ1IVBAJunPodSWTmH8ShzXvIlo93/44uk/yjEvnlP0qs08UzsssrCto5rQMGS904isLm7C7hXlIoTUo1HxPICigJiYX4+tzETjQN39UD1RR1D2hn8l4srQ3xuskq9w/Lry+zE1+Ifb6khlEr7shP6nLMNpoKvV2Cguo6XLzRm2G1YObXz17Z8r3Viy1Mrzd03DuGWt7q8Re8CDTDa0kN3lQSxgOWzMPmHG1EwzCbqwdYqix93/Qv4xpCmb8oIWJs1WH7kKfF64mV3aSwBYk+h818nYbp8Bd/bPdmHq40= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SA1PR05MB8311.namprd05.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230016)(4636009)(136003)(366004)(39860400002)(346002)(396003)(376002)(86362001)(6666004)(83380400001)(36756003)(38350700002)(38100700002)(2616005)(52116002)(6506007)(26005)(921005)(186003)(1076003)(6512007)(478600001)(6486002)(107886003)(2906002)(4326008)(41300700001)(66946007)(5660300002)(4744005)(7416002)(66556008)(8676002)(8936002)(66476007)(316002)(218113003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?S21OdExqcDNUaG5CM2pFUEdCQXBlSStlQlovZktWZWRreHhXYWE2eHNRa0xO?= =?utf-8?B?VjlWU3IxSnVyVGg2Mm8wc3VVb2FvR08vb0tMa1ZyZ1VsdG9ES2RrOUNMN0Fs?= =?utf-8?B?cTRzbWlEazJGTjY2NWNYc0tMZlgrRVFPQ3IxKzFvMTNnMkJEZjJYSEEzcVBL?= =?utf-8?B?Zk05dThWN3FBNUFDZzhWWGcxbHBtUm91OTFFcXBiL1JtRnkvaWdpK3hXcFJi?= =?utf-8?B?c3hxSDU2NWpqWllBSHBud0xjRDNmVmxscWJNMTRaOTZQazM5STk1RXRvNFl1?= =?utf-8?B?RGdhM3RUOGFTaVJWdVNiSDBwcFAwQmxoU2FJNGpwd3Vod2RaNW4vV3BHV3A1?= =?utf-8?B?aklFQmNjZDh5cXRVVURpa1pvMFRYRmp2bXpzcWxyYzdKd2c3ZTdtbXRPMWFn?= =?utf-8?B?dkZTSWJEa0FMUjNDL3krdEY2d0xOd0dUM0xhK0psdjFNa1lWZ1NqR1pweXpx?= =?utf-8?B?VTk4ZS94OHZxS1ZzNzFLNlYxMWZuckt5YjVXSGUzM011emxWTkQyZDljWnhh?= =?utf-8?B?bkhhNmV4N2ZocHhvNk5xMW50OExGam1adUZVSTZOczYyQ2tjaVpzUlAxckVE?= =?utf-8?B?T05ta1Y5Y1EyNkRoOWRianRkSUhNQVlyWlFPVDhjaTZnUmRhM25KMHQvdElQ?= =?utf-8?B?cXZxZGZ3WlkzU3czUDlNTml3ZnZPOGZmaHlvZjRXV29yOWZ4bDhGcTNQbjFu?= =?utf-8?B?Z1M5Ymh1Vk1JZ2diZGhxanUvSTVGSFZDUHdzK0p4Y3F2Q2toUGNQUEE1SGRq?= =?utf-8?B?SXhZQmJMK0pmaFZSTS9NSlZLSldBdnkrSzhWR0k3L0RSS3lMVlp2YXZhSEN0?= =?utf-8?B?dDI0NiszU0wvczRZaEpnNnBWajhqRkJ6NUZORUhOSU9UQkZabitTNVFHQTlN?= =?utf-8?B?d3lrK1VESm5uc2dpWWVWUS9xNUFOSTJvQjFVYlNaMUtsTnZDYVdCcGE4anNw?= =?utf-8?B?cTJMUjVRQysxVHA3bVJCMWg1bytVQjE1N2w5OFVFNWVJNUNHK1dNNEhzUnlG?= =?utf-8?B?Mk1sVWEwSHVHZ0t0Q0hTVFRnbnNlT0FLWi9iTVRETjhNcnZ4UmtDbGVGaldh?= =?utf-8?B?cUtXTWdUTndPVlArd3E5N2Q4ai9SVUltYmk5RmFYc3J2cjRKSnErNTBCYzY1?= =?utf-8?B?ZDhPUENBcW9GbHpTUDhtNk5vVjJqYUgwdVdKRjJYcTZ1TG52MEVkSFdmS0VG?= =?utf-8?B?TUpCanBLTnB1ZWlKTjh4KzY1aldlekhOR2VoVnhpdHpDb3hNTlpPSWFtcmE0?= =?utf-8?B?NC91U2c4RTBPTThKaEp0MlVkWHIzQWZFZDJUZHh3YmxJTXZESGoyQS93TG5k?= =?utf-8?B?TjZjRjFGQmozd25xaUtlNzNFL1RRVnpjMjFFLzE0SG1MM3ZiamtCNFJ2TGdu?= =?utf-8?B?dUFpenAwV0w2bkFMM0ttNE1MYTFOVlpXcG1XUkNGM1dMK2xpSnFqNjZnM24w?= =?utf-8?B?bFE1d3VPTkdmekdXV3p0U2oyTWVTWjJOMi9rKzBvQU1tVlFwL0cwd3lmdVdl?= =?utf-8?B?dE5jYXVJUHBWNjNmdndGbllrMVFma2o4SzJ2RURRUmwrendtNkxGS21Ed0FF?= =?utf-8?B?cUhxajB2NExEbWk5cnFOMmsxRlY3RU5DcXlNN1dySUEySmFtdHNkalpCV1NY?= =?utf-8?B?RGJIb2h1MmlJdmR1UUFwd2J3VjlLRmhUOFRkMC9URDhxVmw3S1Y0REpkY3E0?= =?utf-8?B?aElOQm82Z1c4MHNTcUs3TjYxendoQW9KVzkxSUgzZnIrd3dKUnlYbUh6eDFm?= =?utf-8?B?akhEeXFZNGEvT2VhMzcwRXlCdXBIZVZRRERBR0JGNFdIY0pONTZlVkJIRkFz?= =?utf-8?B?RTQ1ZEVVcUtWTXVMTHJCbmk1OGNuRHV3cWhOTFhEZ0tTeVJxVGo4dmJvK05Y?= =?utf-8?B?cDBlK3ozd3J1b3lKMG0zM2U2QmYvVGpZd29vcmpoa3hkQTJzMGdvS2NXODJQ?= =?utf-8?B?amNmSkp6TWhxQnVXdzA3ZnFxVW9hOEV2ejNwRGtmU1dTc1A3bUZDWUZORGZt?= =?utf-8?B?Qlp0TGpEWlJOL25pYzdzNHRQVG1NMkFjdTlNQWJJY0ZUNVllQ1VOcVh0Mkdx?= =?utf-8?B?aXNYbHVCeXZlZTJPUEpHdWFGWmdZdXhteVdUWnE3OEZYZjBaMEZNSVMyT211?= =?utf-8?Q?XhpxOURLL5viCYC75SGP7K1+u?= X-OriginatorOrg: vmware.com X-MS-Exchange-CrossTenant-Network-Message-Id: 2c1ebc11-2a66-471e-5786-08da8411f471 X-MS-Exchange-CrossTenant-AuthSource: SA1PR05MB8311.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Aug 2022 07:43:07.9381 (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: Sz5qPRMhfFCDy19MVqg7Be6a1X3AaLYHTLRiWHLjIil1afgZs5xJF3vEWjsCj5bejIiP1D2YXQdghjyj5MZguw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR05MB9253 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When a CFS task that was boosted by a SCHED_DEADLINE task boosts another CFS task (nested priority inheritance), Kernel panic is observed. Fixing priority inheritance changes the way how sched_deadline attributes are being inherited from original donor task. Additional supporting patches are added to fix throttling of boosted tasks. Daniel Bristot de Oliveira (1): sched/deadline: Unthrottle PI boosted threads while enqueuing Lucas Stach (1): sched/deadline: Fix stale throttling on de-/boosted tasks Juri Lelli (1): sched/deadline: Fix priority inheritance with multiple scheduling classes Hui Su (1): kernel/sched: Remove dl_boosted flag comment include/linux/sched.h | 14 +++-- kernel/sched/core.c | 11 ++-- kernel/sched/deadline.c | 131 +++++++++++++++++++++++++--------------- 3 files changed, 97 insertions(+), 59 deletions(-) -- 2.34.1