From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from SA9PR02CU001.outbound.protection.outlook.com (mail-southcentralusazon11013030.outbound.protection.outlook.com [40.93.196.30]) (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 E2AB3327C0C; Wed, 19 Nov 2025 16:32:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.93.196.30 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763569975; cv=fail; b=sZQ5rCSxHiwPoaH02ZiVd5k7QkSOVSdHddYZpYWdRD64WMbVdNYsT3nGjtFTXVyjfalX53/GlDO/AsLoKmeNWtoaP9QFCO7EG0N3KS6owj1TuoIo+w2QogOy88Z6S1yBAsCBkGYQHoIYOzb6W85xylPqGFTQZ4kj+hNrQhSd21Y= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763569975; c=relaxed/simple; bh=tPbW9Qm1JFJxkheYagrb1gm1JpphiLR0ExEh6p4BXps=; h=References:From:To:CC:Subject:Date:In-Reply-To:Message-ID: MIME-Version:Content-Type; b=J5SOhnbtQ3dO6ivqHH/FNGNxHgdPecgf/dQ1CfNMJlr35OHGWsKl2JKoS8CwpHRTChb7jwvJivD4VKpTqbtrp8mfV/DrVV61HcbX8nm3lujMOkznDiF57E3u+U9QqIlEA24aKSU/S//y9rmfvx5DTNowBcGtTMcbEpHnZYXKGhg= 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=t8xLRByW; arc=fail smtp.client-ip=40.93.196.30 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="t8xLRByW" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=AylL4qymTbAv4SWoCGxTtcH/aKwt6I5gRmMsXf/RtUcnaNzzB3oK98WMKmpnMeijMe27RzjlHz1A696rxs5rsTbr5CrPybckVba6NUuWFlezZpGuqys5maTkSbeX+1hlhnx3JaHrt5TUMsD/W1LyEyrQ8jOxcw4wPKfYsP7Pq0ObhwfR/KgirZIbLAgvpyPWgn0jnmYX651LsU0oL+KG08/5SuVTowKRrXJRhQBe509eis0+k6oVNMwVhT5brEEPdBAxSO4f6g5zRUMeaGNzUxOpY39oqMlgB8cLJOHIHJjHkpnw8pIZ9tthFKBI6d2vWu9zLeF3Zzuts8J2JPZfBQ== 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=tPbW9Qm1JFJxkheYagrb1gm1JpphiLR0ExEh6p4BXps=; b=EMcu+H5xi01+fLU/XOwBoI8v+bbwrBqtsgbOyyQNUTsg/qo9BdaGrBU765BASLT4KczPybF2cWktfqYt+RptgY+G63BYd2cY7hxFYNOPqB7x54aT6eWnEUcQDfzbG9W48n2PDJL/ThVZoiz1b5oacYqZLzhS2ZYvAz59TxjmsZGT0sLZkd9Kcu3dUacPttynA1Sfof419wr3JMbGut71aKf4IGfbvuPGcrcwu/EOG/U0wCL/oe8OJa9RO7w/1OZ39oHu4Mb6DRP+tEgxKmX+jjlD/1Q/uvs8svsesTW6PtEaWVxylU47eB/no8BA2gAPFHx88zFQ67N1zlt5z0paXw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 216.228.117.161) smtp.rcpttodomain=kernel.org smtp.mailfrom=nvidia.com; dmarc=pass (p=reject sp=reject pct=100) action=none header.from=nvidia.com; dkim=none (message not signed); arc=none (0) 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=tPbW9Qm1JFJxkheYagrb1gm1JpphiLR0ExEh6p4BXps=; b=t8xLRByW+XF7ZGDaNVOfbFlAN98U3myNm6u95LH3hZVQo1B/3QvlHA9Fk6NV+oi2qh/YEcdL1WXLS8HAaaiQLNjLb6VO6mLZ0xVAP8eVVGoe5HLqa7M60wiVScCWgSJFqWlNd3gg2EK+/F6P2XAsoVoW0M8ropGP1a5ESusYxDLfGVb5+79M1Fu0TFbavwn9GY2w5SRSqW5fFCXDPDRkscJiAp8gLdlrvnjHqvv4DADacoaPlmF/6n8fuAgo8FLsLWXy9QkcYueQwETGYhhNUl6kuSP4DWje8ADJG+0YUyi4Q6l6p0t4xtscKcyGzMbewgFkFS/1ILgvJBUTZHK/iQ== Received: from SJ0PR13CA0135.namprd13.prod.outlook.com (2603:10b6:a03:2c6::20) by DS0PR12MB9039.namprd12.prod.outlook.com (2603:10b6:8:de::21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9343.10; Wed, 19 Nov 2025 16:32:50 +0000 Received: from SJ5PEPF00000207.namprd05.prod.outlook.com (2603:10b6:a03:2c6:cafe::c) by SJ0PR13CA0135.outlook.office365.com (2603:10b6:a03:2c6::20) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.9343.10 via Frontend Transport; Wed, 19 Nov 2025 16:32:42 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 216.228.117.161) smtp.mailfrom=nvidia.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=nvidia.com; Received-SPF: Pass (protection.outlook.com: domain of nvidia.com designates 216.228.117.161 as permitted sender) receiver=protection.outlook.com; client-ip=216.228.117.161; helo=mail.nvidia.com; pr=C Received: from mail.nvidia.com (216.228.117.161) by SJ5PEPF00000207.mail.protection.outlook.com (10.167.244.40) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9343.9 via Frontend Transport; Wed, 19 Nov 2025 16:32:50 +0000 Received: from rnnvmail201.nvidia.com (10.129.68.8) by mail.nvidia.com (10.129.200.67) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.20; Wed, 19 Nov 2025 08:32:28 -0800 Received: from fedora (10.126.231.35) by rnnvmail201.nvidia.com (10.129.68.8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.20; Wed, 19 Nov 2025 08:32:22 -0800 References: <20251118215126.2225826-1-kuba@kernel.org> <20251118215126.2225826-7-kuba@kernel.org> User-agent: mu4e 1.8.14; emacs 30.2 From: Petr Machata To: Jakub Kicinski CC: , , , , , , , , , , , , Subject: Re: [PATCH net-next v2 06/12] selftests: net: py: support ksft ready without wait Date: Wed, 19 Nov 2025 17:31:58 +0100 In-Reply-To: <20251118215126.2225826-7-kuba@kernel.org> Message-ID: <87jyzmasqa.fsf@nvidia.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain X-ClientProxiedBy: rnnvmail203.nvidia.com (10.129.68.9) To rnnvmail201.nvidia.com (10.129.68.8) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ5PEPF00000207:EE_|DS0PR12MB9039:EE_ X-MS-Office365-Filtering-Correlation-Id: d0d530fc-ea41-4378-bdca-08de27894835 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|82310400026|7416014|376014|1800799024; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?qmAIwH3HrzQ6FN9D9cRcfuEv2gUZm9xA49cu5YYtRE4Puf8GU/PZNAhmcmmZ?= =?us-ascii?Q?/WPZFux7GV3JjunzBiCQrgBI+Q/PL9Vi5KMk3+YieNqOpxBr0MTFLmidGsye?= =?us-ascii?Q?c+VhEYuMWBfWVWk34s8XkltBmxq8pEV+EsG95ORsowaYEqKBR4bFh25tmFpM?= =?us-ascii?Q?EymE/wYX0MZVqrXYWYAXg5H69s4LnS/4Co6h4hlUgbQ7aZDcfXeWcMxE1xmb?= =?us-ascii?Q?+62tmsDCJo97szgH6snVsX1k08bOoSVeNSu6S4SIaHgK/43NgX23ZB2zKS/G?= =?us-ascii?Q?QB90Pwlb7PwUf0T7cu0gh9gq0y5EunabXye63GUBeMMBPb5/84tUjHe61fhs?= =?us-ascii?Q?sRAE5ZyLOphFporzw9WgnocyqQkZwXJyGZdPIcF90gnJCTUziasESY238F6i?= =?us-ascii?Q?/+W//4TGXhWcJuH3sJDiGm987VYA91as4FmGXAUH7L/VpDf7yROYpjBPln98?= =?us-ascii?Q?xVoOIm9Nqw6K7YwOwiOSaTqzqH0y1AQytGuU8kinbiBJiR5tlVWju/jsAmGD?= =?us-ascii?Q?st3VZDy93ZbrUzu0bz9lVmqvyi9+tG5+0TUbsncBWaNNnNB0ZLMdw523+0Mc?= =?us-ascii?Q?wb46Evowgvx3ysDe54AJS3aceegtUnMw59nqZUukifG7vlfJ3xdbiwTOTlkb?= =?us-ascii?Q?IZC302br+4WHQbICFx+irlRLcAi5Ku4OL1kz+0o91LmQ9lxNdJ8InpaT1blZ?= =?us-ascii?Q?hJ2Rs9Pby5yjXvK9hqWhy2xU9kUfoeBRDOmoDP6Z7ovWS74H2UxMCYhLSIWI?= =?us-ascii?Q?BI2mPwK9TB8F5f4FCs5sXlFZ+f/CFXh//of8+IIvfWTDcze4eW1rArUvLuXI?= =?us-ascii?Q?HjpX9S25Lef9VT7ECGbBLD+0MFZspmjcTAYofTxt1kLGpZp7OKfc6afsG5Xn?= =?us-ascii?Q?Y66LRWulSAElHpoNI/EfWOJnfRbgTIr8QLtPMy8kbKqPg2+19Ry1H2dISJhP?= =?us-ascii?Q?IC0cSI4M3pzK94TQu80PyCx4+EtYIjwG8K3/Wvyz8wXWFu6VNLpJGCmVFLhJ?= =?us-ascii?Q?wPT0AW1Q4u1HnX8qNSkNZ+g+Q3hUAuimo6W2g30foloFjKgu6lqy3otrr+f5?= =?us-ascii?Q?+9adN96dJJAdVbPksI80mtAz+1CdgBOrYZYDUp+RZuQTYsN9hCKijrvXaljL?= =?us-ascii?Q?5jcvfs2nBWJDhIlOmbgMqvTGf9aW2+2fe45kOpKmztuk3ojRQwyBynzXmSz5?= =?us-ascii?Q?jcNNdD8NT1XmLOyGsUCG5Hr1MjTvE5Cmn87iYl9t92yNICPQqX2VbiRyq2Jp?= =?us-ascii?Q?OaVmqiaB45U5JAMeuUZClPOSjyC9pgxL5dxhyOd3e8xpTRCwimy84gZi9BBG?= =?us-ascii?Q?S9vC847e+RVVgqWUDb8yigk6wlyS2mJLl5+dqFHGT6iTqaoxqCGlEKjUZiVR?= =?us-ascii?Q?5l8MvAEwDzqX6aXIw8wCKDKB5XcoorJ/17hsbTmRPprVlJ6BKpf97mDmsMrH?= =?us-ascii?Q?qd4DysFcIOSKYSldyXL0i0zQJOsnoR7lQue7l1Vv8mTH290odQKnujwwFFEO?= =?us-ascii?Q?IBfgXUkSfyyFg6W6lU8W4E4pquQh0Esi5te44n3NUAg0wQXjfMd+JLzyHylp?= =?us-ascii?Q?2vy58jAy3fiARy0D580=3D?= X-Forefront-Antispam-Report: CIP:216.228.117.161;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge2.nvidia.com;CAT:NONE;SFS:(13230040)(36860700013)(82310400026)(7416014)(376014)(1800799024);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 Nov 2025 16:32:50.7376 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d0d530fc-ea41-4378-bdca-08de27894835 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.161];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SJ5PEPF00000207.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS0PR12MB9039 Jakub Kicinski writes: > There's a common synchronization problem when a script (Python test) > uses a C program to set up some state (usually start a receiving > process for traffic). The script needs to know when the process > has fully initialized. The inverse of the problem exists for shutting > the process down - we need a reliable way to tell the process to exit. > > We added helpers to do this safely in > commit 71477137994f ("selftests: drv-net: add a way to wait for a local process") > unfortunately the two operations (wait for init, and shutdown) are > controlled by a single parameter (ksft_wait). Add support for using > ksft_ready without using the second fd for exit. > > This is useful for programs which wait for a specific number of packets > to rx so exit_wait is a good match, but we still need to wait for init. > > Signed-off-by: Jakub Kicinski Reviewed-by: Petr Machata