From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from DM5PR21CU001.outbound.protection.outlook.com (mail-centralusazon11011035.outbound.protection.outlook.com [52.101.62.35]) (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 66D501E51E0 for ; Thu, 21 May 2026 05:53:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=52.101.62.35 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779342826; cv=fail; b=mQPB82hEurcjYpd/n3JcL0f2fMC5SU8dmfkaybWZXGSd5YKVnJzyM8TvtiZzIOr0Hiz9gEkA6PXymRvdYZjR0jKIzTmI48Yg3ecjuMRTeQRpp2d/bxOfP3SOzQBep0f9DaFtARdV7nSGPqVXFAayPp50ctSPvOtiq6+ylowsDqw= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779342826; c=relaxed/simple; bh=S2tvoZdXp1EYVK0qiSpwbetkY46F07AlzVQC6zqNu0g=; h=Date:From:To:Cc:Subject:Message-ID:References:Content-Type: Content-Disposition:In-Reply-To:MIME-Version; b=ctGDvMG1NB/K6ASx6qBnyYwOY/9pfUnCT22IeOJVQNeXWmg6UmB8bG6SElzAqy89YRLi+Qm7FWmggduIA2dTopw2MVyZpkAOBQGAC9nbf1Rfv8WJbuxwQKao7UsGiE0/4Tp9TZ7qQCSPrv14+hkEhCsrNzMnG6HfBPCWgE0Df5o= 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=hyUJIqDC; arc=fail smtp.client-ip=52.101.62.35 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="hyUJIqDC" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=ezMM2B25/KIe06NTEYBDMKevvvqXShs452L+Gdrjco2s/ykv10M5Umk36H6j1Ur5xw97FMEnCOjGwrnk1jAH2kpb0giQ2ELrYzYcvPDgSltkRRUz9ZMVSPeNeCjCIBRB6BYv5DMGNTZ5SyfEL2RuhCkgTlOUUKMjGypGz99E2ul9MDJCbdAVq7G1fN85bwQ9NFXYTgx1ssmDIi4fC7hosRzej3Kx0HjPgZNR+nIMUqd1jMcAO0cg2J2DeR5bIJ5MW5MdXLKsoa4Y69zFabqGJMZiIVISCmASvKiNPmOPdEKiEnz6R3392lxLpaW3oRpCxoQ52eBvTDOcv7xvWsQ84g== 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=ObkjtilisUf8BdsgxqXOzRmIo/47AIdt7GjsCct16IM=; b=cNyFFftVsvBDC29qDVff+E+CnGE9BHJB3RCMXaEjQCRxU2hf067w3D3SOVswxAIhNKF7Xaq22K6F3hFbC4VqLzhVY4m2hoqGGhLvBL/Ck82qNct0a55G90wYa2Z5lviLW2PcO2gy41leXBFN2yt891w903hBOCKMdGNUGQ8N1W5U09Cq0df8PwRq1K9LGBz1WmsFjdaMTUPI2KrceTog0YpYre04g0tF7ukCRz2V4yktCJUhjl7s/PX6/sMBnJy7u41WQGYrMQ0HCXvcQdzuB1M+C6sllGpn3Vg51iJLolVQfisebfD87NSO1YOmcgYJC++KSCM1j6yjojZj1nqfCA== 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=ObkjtilisUf8BdsgxqXOzRmIo/47AIdt7GjsCct16IM=; b=hyUJIqDCNfLx9gkZ9lJJIziB+SjnQRMr4gp2BrY49uEeqcDMSv300gerkaW7/1L06L5FLvcHme4ft8/WgzuiUuqkHLRkS7l1GVM93yS5If48uNVqOdalKh7HaOTUGfiQg29MrUb0W7FRwzCXFTiGCsEmeU/O4cehPQ80+X0DyPbp1TdslDcpY5qTs+/XgQa3DAHXyyn8QSeioZTyX5eHK0qxvDdbBaR4RNTGrLyFR9Kyp+xhDSTNAuj7n424tJypvhy4YOwxtJIbb6mlopuRhgcSCVN57tkRlgIB5xyiRyi8iyjQT0sgPrrPeRNzjaZM6gzoKVzNiIRiYm7k1wuMFA== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nvidia.com; Received: from DM6PR12MB4827.namprd12.prod.outlook.com (2603:10b6:5:1d6::14) by MW4PR12MB6852.namprd12.prod.outlook.com (2603:10b6:303:207::21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.48.14; Thu, 21 May 2026 05:53:41 +0000 Received: from DM6PR12MB4827.namprd12.prod.outlook.com ([fe80::6261:3040:864b:159c]) by DM6PR12MB4827.namprd12.prod.outlook.com ([fe80::6261:3040:864b:159c%4]) with mapi id 15.21.0048.016; Thu, 21 May 2026 05:53:40 +0000 Date: Thu, 21 May 2026 07:53:31 +0200 From: Andrea Righi To: Tejun Heo Cc: David Vernet , Changwoo Min , sched-ext@lists.linux.dev, Emil Tsalapatis , linux-kernel@vger.kernel.org Subject: Re: [PATCHSET v2 sched_ext/for-7.2] sched_ext: cmask improvements Message-ID: References: <20260519075838.2706712-1-tj@kernel.org> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260519075838.2706712-1-tj@kernel.org> X-ClientProxiedBy: MI2PEPF00000B7D.ITAP293.PROD.OUTLOOK.COM (2603:10a6:298:1::410) To DM6PR12MB4827.namprd12.prod.outlook.com (2603:10b6:5:1d6::14) Precedence: bulk X-Mailing-List: sched-ext@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM6PR12MB4827:EE_|MW4PR12MB6852:EE_ X-MS-Office365-Filtering-Correlation-Id: e08145ff-c6f7-49dd-1734-08deb6fd4f0c X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|1800799024|366016|11063799006|6133799003|18002099003|22082099003|56012099003; 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:DM6PR12MB4827.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(376014)(1800799024)(366016)(11063799006)(6133799003)(18002099003)(22082099003)(56012099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?f08cjmplgiOqH1GO1UYjzZ+V6mqaK/YUXIyEQmw5wYyJSV9QYORXJe/qjEgO?= =?us-ascii?Q?0zQKA7kLSOL5kRyO0F2rwdXhf8eihgUhf7Xp/sD/eYFY6MNKnTYUr+Z2u/zk?= =?us-ascii?Q?HrLpq9G5Gxyl4LtC3LpazdOj9SpccVAyJLoex0uB4WAuOpHLHlDOOBuytx8C?= =?us-ascii?Q?h1CC/Rvh0+ihQWEwj+wNYP2s+A8uvLQ/nSKoveTp2uVKjojGbDQptsOCHnP6?= =?us-ascii?Q?K1PnH3sbAhCuwo6v7FiXOGnXG/I7si3R9/CQt3zjWuvvbel6op2H4eCUWKfg?= =?us-ascii?Q?ZNixdDOqAc0ae4DKoU2e1yyQQnKXY0yjed2ostrIIDyGv1nON4upX76RymA3?= =?us-ascii?Q?3AfJ/KZ9T1e+e21naE8KNIgV1OGhBnoUXlutiETEyYrM135gaft7JPtZm63q?= =?us-ascii?Q?ns9WDipikoENYsQ4rEQH3U5C/+laFBNfTf0F254d1wH/2eJUOYsxHMUUA+pk?= =?us-ascii?Q?MZ5zttdHBccfCThi6S1xvmeKdyWfhIInPDiE6KbPs32EcD8jOtHklkWf0r3G?= =?us-ascii?Q?zvL7HDsnrwIJyLZm6YT+Oz3FJIK1bKm/t2JmFTah4wq7oHIX/+U/No5xcLMv?= =?us-ascii?Q?gkaQcNuT8ZTWK0m6OIvsdfT25Gv6JTM62sKqXUxXmrLqDFnt/A7QF/2kxrBE?= =?us-ascii?Q?mJYY1h0Zc7wDwSzYa4M8DrwSI4khPjFcdn3EzNPSs1LQK8Q4lmhpT5M9qfdE?= =?us-ascii?Q?ebD53USN4PwIIpIJh5XbzlhHG3bh5rGzf4DIiO7+iYeb70pYfz+x5I6NAXT8?= =?us-ascii?Q?gpI1l4up8gsFNcmhNblYB3gqP3PGUK0CEIEbYjH8DWQhLRzJN6StZzAAMUhZ?= =?us-ascii?Q?HoNg/AwEdcn7AWEcjIvSFicnZR47A5cdrSimeOMegktUrAj4gW91YtIr2M3e?= =?us-ascii?Q?l9lqTj/QQZgKKrhgeIRVZl5xKR0FeZwjZNc89bgoM8gNWcTG9GzD4u063/MB?= =?us-ascii?Q?gy8xcnuiGqJCWgN0hIceqrQ9JDMWvZTW2CiiwMMeel/gxejScElHfoWUFtJ0?= =?us-ascii?Q?7A+swDm1G+QVsa3+MwN4fVjg7+p+CHT9VQChLBl4xCUHMnUgMycEcSAebwdo?= =?us-ascii?Q?QIjxYACo3SSYXclAbc58isrsgxma4C2akfGLxHDqmpPtlQwiiM3oTrZK9ZeS?= =?us-ascii?Q?e86KIvWenCxNmQ/ONpGERbrxa3LmwB8jzHXTj9NEJPkPcTQim6O+WG+aev13?= =?us-ascii?Q?N9J1tNjDuqSSQoFIZ5Qeb9jGKGHh12oMJod0lvBRHiUbaMBTWgz52eiGjS97?= =?us-ascii?Q?BWtPB1oO2L50YeEHkM1WgLAdX8oSRAAch/3BgCp46rR4ybwOf1bYqg3SS29D?= =?us-ascii?Q?v6jhtdRup7O9BwdMYVoh0emA5DYI+uoLt6CHp4wu0ZBcevKpQNyVfnk6+bZw?= =?us-ascii?Q?tJBrDSs2PvDoTClaEuupozgIBqHUCnJEsTMkzhRNKXzs87gi7kejPoTOFm3p?= =?us-ascii?Q?2G6ymWXH0J1yvyMW+3oQfl5Zz9CVdxl4ZZ3mZ+RlUVL/oIKUdbx3xuEe0Vbg?= =?us-ascii?Q?NchR9DOiTdfqLZc8VVB3bV26y3Siva75pd1F6MTYcFwkGS7VjqQwjhOueiA4?= =?us-ascii?Q?6yNRIXgyPrg4QLVFfdk4bql+2cJe2CQ73z5n4WW4S+4f4T5pcbb9ibI7Zbpz?= =?us-ascii?Q?iyk0P2bMwZjblLWHXWgR5dEqQHYqPP3nK2645jSYar/W9nFM60qg1y1kw6xK?= =?us-ascii?Q?afflpfYw5vTucOFL2kRx8K2uPX8Y5+MAi9ZL/c7sUCmWUnHy?= X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: e08145ff-c6f7-49dd-1734-08deb6fd4f0c X-MS-Exchange-CrossTenant-AuthSource: DM6PR12MB4827.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 May 2026 05:53:40.4265 (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: ujvB688+SxHBnML9JMapCM3HNPuJ/W+PrtK+WGBCoxaLfYpPC9FJxrTkv2EQEiyUTCommy9Vn+cQGEkHJrf2qA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW4PR12MB6852 Hi Tejun On Mon, May 18, 2026 at 09:58:35PM -1000, Tejun Heo wrote: > Hello, > > v2 rolls up the per-patch updates that went out in reply to v1 and > includes an update from Andrea's review on 2/3. This one looks good to me. Reviewed-by: Andrea Righi Thanks, -Andrea > > v1: https://lore.kernel.org/r/20260517183614.1191534-1-tj@kernel.org > > v2: > - 1/3: Also rename nr_bits in cmask_copy_from_kernel(). > - 2/3: Init scx_set_cmask_scratch. Bounds-check __cmask_init(). > Widen *_CMASK_NR_WORDS() to u64. (Andrea) > - 3/3: Add scx_cmask_empty(). > > Three patches for cmask: tidy active-range bookkeeping and add the > mask-on-mask op helpers the sub-sched series will use. > > Not backward-compat with the current scx_cmask layout/API, but cmask > landed in for-7.2 and hasn't been released; scx_qmap is the only user. > > 0001 - sched_ext: Rename scx_cmask.nr_bits to nr_cids > 0002 - sched_ext: Track bits[] storage size in struct scx_cmask > 0003 - sched_ext: Add cmask mask ops > > Based on sched_ext/for-7.2 (1136fb1213d1). > > Git tree: git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext.git cmask-prep-v2.3 > > kernel/sched/ext_cid.c | 322 +++++++++++++++++++++++++++++++++- > kernel/sched/ext_cid.h | 72 +++++++- > kernel/sched/ext_types.h | 68 +++++-- > tools/sched_ext/include/scx/cid.bpf.h | 144 ++++++++++----- > 4 files changed, 545 insertions(+), 61 deletions(-) > > Thanks. > > -- > tejun