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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 6B0C0C55838 for ; Thu, 6 Aug 2026 03:30:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:MIME-Version:In-Reply-To: Content-Type:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=LLgK/IcRUOqWpyu6BP9tHyjp6F97xYl75tinUxQAMBU=; b=R02YjBPH9g92dz8c4APn7IE1Kp NzHIn7mVY1Z4RA5ZHw8o6jS5vDA9KlNtH8y1dUPDIrW+BVmhrOppTtf8ZIavgnnGJtUA59+B0Y/uo dvznEaKwovknf+dY5+rm9tMlzVUlXP7b2Jks8H4Eg2rhjKdN48QEhdGHa6UwJ3uZab4/gyzJiX0+/ bl5eWw98h/sq+lmqGmBcUwWTrJ37zjNNB3kEqMYYWiI4VRX0KlpDg6c5CPq8zE1e/B1tsnEWM+4Vi om1flvLPrgrfI5AFen9d8i+W9m2auEVLFK1dRchh1mSw14KRBXM04JPt2mfWCWrX1MB7tDIya5YFY XI3FH7SA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wroo5-00000004sEP-41g3; Thu, 06 Aug 2026 03:30:09 +0000 Received: from esa5.hgst.iphmx.com ([216.71.153.144]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wroo3-00000004sE4-2p8e for linux-nvme@lists.infradead.org; Thu, 06 Aug 2026 03:30:08 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1785987010; x=1817523010; h=date:from:to:cc:subject:message-id:references: in-reply-to:mime-version; bh=f4ixBhd7Brx2jeJDn2ZDV6uWgiY8aIJ7ZzMiWDDFOJ4=; b=QXVtkjjKf9qJmYmZdCiHHLQ1ZLd3Ard2TMIkzyqpBpm9D+U1QoD/lvtZ OaIw9zQVSBfVIrgd5um5PKUih5YsEo9UwdlNWhhiP2DH1tAtB5ZF1ffnx R2g6b3qECebJ8UgBKVzqqLGG8UmhPQ4flZNug3JGTM0nIyvQAuI9gCx4s JGN/05w9V0Oaro/c3XQlXXmhYn39WPXY1XEdAc/I7wn7xyQw0WP4ipSs8 kE3Y6xJ9SLSOMw/VIZbt90zHKT69eumInxkV73FMiPpCnkWIkFxcRaQCY +mbFUluMksCviAjBrpKsLKqJscWxfAATQKVh2iOt/EgCAdVS6OYrLXBG+ A==; X-CSE-ConnectionGUID: Eng7EBueQTSKq3wtbQT/tA== X-CSE-MsgGUID: u7pVxr/+SI6cJNvMsdtC2g== X-IronPort-AV: E=Sophos;i="6.25,207,1779120000"; d="scan'208";a="151606734" Received: from mail-eastusazon11011046.outbound.protection.outlook.com (HELO BL2PR02CU003.outbound.protection.outlook.com) ([52.101.52.46]) by ob1.hgst.iphmx.com with ESMTP/TLS/ECDHE-RSA-AES128-GCM-SHA256; 06 Aug 2026 11:30:09 +0800 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=PIc7QGkfbzwhWv5g1oCszeq9JBoLk06Ku96hAuGonkhW1FP1vAamHIkVPZo9BbtBacvByJ7shLPIqWoEBGzCEiCFH+oBztdeigxNLIPjVBiBUpm4XP/BNRQCTUlGFWu0CwRBW/XUs3peUEEJGB8a1YYW6VA7GoxBexdbPTY4bGDM/wr2D+PI3Eu5Rj47H1L4s0Vs7PTdFpfQxLjAQqbhzxqpFddKM9uhm/eLXCXIENgYhAyGvnpQVMmHtqp0qxaBqs0p8UqW+mjMk0tN9mf6EqxyPbQZuw5S/qQnTs9MxEz4LnEukO1y+hJMQE/3ddLwetTFq+2/2YdbZ8YFKaK8wA== 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=LLgK/IcRUOqWpyu6BP9tHyjp6F97xYl75tinUxQAMBU=; b=mRWBX27XB+fEgZ011v2GLdX7sg7nENOuT6XOD5k+INdV2jInbCHq7cNpe7MYZ4MmRF6i90jzhITGvPCbbGf/zkwCY6JHkhoPQyu+kpStc/iSCcvwika9Nse+4DwyfjFdr9bqVvbpHuyVb2s+gskWqlYeiimnweJLBulFS5ZXga0kS8gvBWfDENg8Q339PGjxq/33bsxvQKxAWBtwIJs5eR2v9r+hwY9bjdpH0Al3VUaxbIhxkR/xsVOcOTKEket6b5TlxTcN0gjbU2jg4p7KJaEVBgG3HcHyzDnfQ7cDFYlQFNxTlwBN9wiyjQFj+ylKAwUWu7W4t2izdTEKDKcyPg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=wdc.com; dmarc=pass action=none header.from=wdc.com; dkim=pass header.d=wdc.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sharedspace.onmicrosoft.com; s=selector2-sharedspace-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=LLgK/IcRUOqWpyu6BP9tHyjp6F97xYl75tinUxQAMBU=; b=zVzjdRiwBqjo5cUSgVFCsVXjq9hYe0p8nYzKeKMGJwSB5WT0mWLbDOPl6AIK1SzxiLmd/86gEMiBP/sub/3lKjtr9XU1gxbQUozgIb8RMd3M9QtIKSSElUn3q+LXllOSlDfPMq306n4hX3T1LMrI1ydQnYA1YzWu184a7MLRPK8= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=wdc.com; Received: from SA1PR04MB10065.namprd04.prod.outlook.com (2603:10b6:806:4dd::14) by IA3PR04MB9332.namprd04.prod.outlook.com (2603:10b6:208:505::22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.292.20; Thu, 6 Aug 2026 03:30:04 +0000 Received: from SA1PR04MB10065.namprd04.prod.outlook.com ([fe80::9b98:bf8a:b0b1:ef85]) by SA1PR04MB10065.namprd04.prod.outlook.com ([fe80::9b98:bf8a:b0b1:ef85%4]) with mapi id 15.21.0292.018; Thu, 6 Aug 2026 03:30:03 +0000 Date: Thu, 6 Aug 2026 12:29:57 +0900 From: Shin'ichiro Kawasaki To: John Garry Cc: linux-nvme@lists.infradead.org Subject: Re: [PATCH blktests] nvme/068: check module reference count with patience Message-ID: References: <20260805051353.2037772-1-shinichiro.kawasaki@wdc.com> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-ClientProxiedBy: TY4PR01CA0001.jpnprd01.prod.outlook.com (2603:1096:405:26e::6) To SA1PR04MB10065.namprd04.prod.outlook.com (2603:10b6:806:4dd::14) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SA1PR04MB10065:EE_|IA3PR04MB9332:EE_ X-MS-Office365-Filtering-Correlation-Id: 2a98d371-e223-49a7-72ea-08def36b00cf WDCIPOUTBOUND: EOP-TRUE X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|19092799006|1800799024|366016|376014|23010399003|56012099006|11063799006|10067099003|4143699003|18002099003|22082099003; X-Microsoft-Antispam-Message-Info: qjeiO/ujzeBkIF8tfZMGhtsxGMpLs7El9AfjO8mngwIeqMHZtxhtf2wiIVuowGtBMpt1OAwGnQeO9xN55EyTyUh9OpfZZFcyxm7I8otVnP5hlNPrs2J9HE2N/Oo+aAS4d/IJ+MwEgodMapQsQ9bK4A35392Trm+RrUTRza/lVhviFrW1ETHU5OOOLD0GBMzGuaHiDWtbFigKgpiLkq9kUag/tpAjhM1FBJWRW2SXbHyZ1vEgCMYGUWnLTrdFJglxlkisuQHDup5e5aTJoBPXLRkBk/snXEOt+Lq+VE7BaSVcPU5t5cvoMgwUpjIFPa44g0/FZapJ19m0t2vumeRHcB5DRQLhEQWVEr8swtIJ4XxcYJPrv2APOAgtp3DuIl/ZOB0SvQ0E0G5LNKizoNexXkZHfMh0VXN6AfGY5yKTbml8E60aiUQ/QwcojYUwqFw6qenZcpu0/iII/1/nOOLqSNNWzHFWbmLHs0OEm73E000LrkAT7FJ6OGMm2KpBtzrPS2Z1Ysfb+HOLiy7HDWNSmzxh2bhiIw4Tn25qx30+qaT1hOezT+sWzZjsKB0L//x/PPknoyI6dlod/Jf4JANEewJ6nVUjHPcU3Rlq5XCTBjodT+sj3CAKROzIyNGdZxY8ar+9KGJ7nDVa8rOxazKUsJzgHqNdNO1f+mnBrRAgVs8= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SA1PR04MB10065.namprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(19092799006)(1800799024)(366016)(376014)(23010399003)(56012099006)(11063799006)(10067099003)(4143699003)(18002099003)(22082099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?fZPvKEGoCi2LFvd8dAILyX81YAco9uFyVrL2NtNqO5kG1rzSl7Irp1pbL2T/?= =?us-ascii?Q?gs9xpsPBbJrHYgO5mofQ0Chti6Bije9F8Ozi29qhv3tnY0a563/EZtR9Urm7?= =?us-ascii?Q?ILWJ2NPEEQtx0GwJW8shVE5dWJReQ2OB0rayT4NuSRA3MACXK24JXayTh54N?= =?us-ascii?Q?ngwMWElFoyU4+0f4Q88QypLncGnBBQwsy1zWH33jJlnKo1VnTajnpJMMeRdv?= =?us-ascii?Q?TLnqaY7fbLj1f0w6dwmp4a9P9vn/87EDDtVAbVhqew0gzsGkei9gN0QrXVcz?= =?us-ascii?Q?8nV8lvIQ55yNLYT9qN/3rvDfgzS1g2QQJgXHpcjutX2OU/qgHqfaVWOSCb5K?= =?us-ascii?Q?Arp5GZy0rKeFAVc2XFxlSEMi+0dQWvrs7Byay9baAhEWJR65dVDovs7IvoB+?= =?us-ascii?Q?SJel4WB81sT6dW7zBd27slG30DCUt22Th6wdbD0lhFzOMrO+uuG7FAYYGrYa?= =?us-ascii?Q?7NBVl2IUGqdAuBAgAAPxOSY3VoqLVxK3FvSuLpSmBeQ8+zbZ9RtRshYsUxUB?= =?us-ascii?Q?4dc7leE4N1vlzx55GL3PVLO3TMzAyGRXUEA/uUEAImfSCbp844Mc5HEXRald?= =?us-ascii?Q?D/85WncW2EExehoYfx6/py6v//gdfjHbzDSFuFrx1ozVNwL9vLhxN8NYybHV?= =?us-ascii?Q?8emzOiW/QKsNFzMvyYlRi3Zxgc5t1JHW9/el3azmTzynpABOcH52bmxsy/wS?= =?us-ascii?Q?1lxBo4FLOxmKbdv0roEx4sBdnmjsAjH2VfUK3Jt9nfrccCAkKLRvaDKBWKOj?= =?us-ascii?Q?vMXE58aCo0aaTMbcugdC4NAy0xGVKPskYqrikxQwuw5R5q3VuZ3RPYQhlrx0?= =?us-ascii?Q?0xHJa7jFY5mYE1aiBA9qZJqCowLod2RyWvgFHKKoZwjWtQ6lbrRDT3132+qT?= =?us-ascii?Q?wLsulEP3HxoDAe6bhRbO39g0vO2Vzal0tHtslN+JfMg9yfcP9yL79LWabxP9?= =?us-ascii?Q?gEERUKcPgZtxVAjqaMAz1zt1yQPwH18iHhtK6msPxuqS25R7quP+7jcAcqHf?= =?us-ascii?Q?ocN94aXpGOekhdtOXGFLiAcPyhH3r9Np/27NYaRPSNI8FaqsEukGysFEjsAR?= =?us-ascii?Q?VH/o3bHKXXphYmMU8Zme6Lsu8W2p276BSsFkuDCiu26xU4H5wnjzIswSnsBl?= =?us-ascii?Q?ixblciPCvjIzKGqrnHsYZcPUoWyjMHL6t5xTLAAZAIAPTwA8f2FjLTUc14XC?= =?us-ascii?Q?N7GGKL3SfTwdGsSJNYz4U72+ZCzpyJ5u/jhgax5fncbIKcRnPVI5my/CL1xa?= =?us-ascii?Q?5Eui6tWDzrjd92ONdQrfH58SB/Qs+ikPBxzUCtTEj3iFf+z+bP11Q+tZLpdz?= =?us-ascii?Q?YpAN85WnQv6Tbvw+ZUFc7z8uSlLeYMfUYQx68Xo9IX7j5548C0/i7DWQEf/X?= =?us-ascii?Q?cb7pVx1LAm9wN2jn+nblfgXK9NJtGe8ftc+cEHJjXq29EDe6cBJKChFvC84b?= =?us-ascii?Q?nWiYVpJ6b2zo1u6FbzMqIi9iwYxGwmyG4teT6qUMOmMDFTuQM7gAMoS7ipnL?= =?us-ascii?Q?yL0yHCAD9YAtou6raM7HwRuvmHfH5RmKimt37A/F2GKcIzUN0PrVL3riQXuu?= =?us-ascii?Q?m3Z9OGXzbEA4kX67JihsK4Sxi6QaEc7DyioSUtlCeNRDtdZNBjKIQhYn351f?= =?us-ascii?Q?QtRYQakxvuEntBeAuy3D+aYM8jMk7NL4bmmt/902ZLbUJdPFSqPIwk8aMpwf?= =?us-ascii?Q?448j4TGnI0EDn2DZ1V/qI800evzOep2LQBDblUm0zvwRp1iMCpjitkERMFFd?= =?us-ascii?Q?S1UN6q9egAmPUcFYORPy/Wq3yWqNM4s=3D?= X-Exchange-RoutingPolicyChecked: R1BrL9ctnj6zUc0VdX+Mdx4Nu5q0UsZAcqX0/0dnaWJ4rYqZ1nD2K2jF0HzVfQvjZcCqVp9KhfWviwVtfUEsdrF38K3NbK6C0YeSEZmHu7N9w3Wi5/VhGzemfzBOBY/w11gTwI7En2t7J0MZb4woiIJb8SaMwcaIKsOFqYCGK85cD/XLmAQLTPLu+0Vtmt7/y70VQeEHDbicXQfBhg1MMGuQuRxCKf0mPS4OYewtfAkJNuRGGxQMgU9rUa/Ien/QTcA0P8qWBrYrnS3X0sCeSM3HhwCFFBmJYn2FzF3acGR3iKryru1mGCF2wSYy8zB+Pp6bu8uQXwtrZKW/mFWBQw== X-MS-Exchange-AntiSpam-ExternalHop-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-ExternalHop-MessageData-0: hDJ+hStcuTD4CPWMnmwGXVhBnoa2JR88Bnl2zieKR+QpibDVbJ4zJ1HfOD6GOqMdax+2O+u3GlS6v4ThcDQ1vAYVmhq6RPNAqt+OWsDo64EjQMMnKy+w6arqQNlDYdUepbbojr1ZOzQRi9O27naaRpEi4mwoDz+EthfaW8o15sj+4SwxTjuG63fvSdV3nSUA2mKxDEnQDmkyS5KPbcfVQWNBNH6e/WmC4IBRR2oUtQkx1OBWWtcenlEir8jSV/oRymJ4De8aTpEnrTz8FvRRBO5YvyMVal/xEZE8ugVK1jRYpvxoX32jPGR9jEn1t9AMrEtFEHUVDA42UaLVmj2S1IM4m9nPL+lT6vHZ/hH+c52ZP1LF4k/LC7Rylid1HJ4g4FP11ser2wBAGtDxgFU6yUe8K25+KUnw98aFn2CvZQKXVrt+kS3YppDpEpVr0tChzgf6Rj9S0n9FmqOTAPiqVg0clOrzAT9v4Hl1CkGOYbL+QikP/CAMz/Dxvvm6u2sdGCW5WlylB5YfFH90RJc9FH6cteNoOudgVNoVhlsbQ1GVrZni0Y1mnFS+vBeHad5FPtPJHc0AKFPhRXaQSueN9tlyOV4LW0/Jkxdodq4sWs29oLM9ZsMKsI5yDFV3MMFW X-OriginatorOrg: wdc.com X-MS-Exchange-CrossTenant-Network-Message-Id: 2a98d371-e223-49a7-72ea-08def36b00cf X-MS-Exchange-CrossTenant-AuthSource: SA1PR04MB10065.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Aug 2026 03:30:03.4945 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: b61c8803-16f3-4c35-9b17-6f65f441df86 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: SEkNJiWY1TGkA7uei++9GqNbsDAOb+PeiuaEniMt+ZCpJp+Wm/HTDp5LBBpMWcSjh6hECiCed79zgI6ZwUb+a+ylRJsbApmyTSWQ5Ujhn00= X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA3PR04MB9332 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260805_203007_775120_D278D526 X-CRM114-Status: GOOD ( 15.74 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org On Aug 05, 2026 / 09:07, John Garry wrote: > On 05/08/2026 06:13, Shin'ichiro Kawasaki wrote: [...] > > diff --git a/tests/nvme/068 b/tests/nvme/068 > > index 4aee95b..7e39e17 100755 > > --- a/tests/nvme/068 > > +++ b/tests/nvme/068 > > @@ -27,6 +27,19 @@ _delayed_nvme_reconnect_ctrl() { > > _nvme_connect_subsys > > } > > +_check_nvme_core_ref_count() { > > + local refcnt i > > + > > + for ((i = 0; i < 10; i++)); do > > + refcnt=$(_module_use_count nvme_core) > > + if [ "$refcnt" != "" ] && [ "$refcnt" -eq "$refcnt_orig" ]; then > > As I remember, $refcnt == "" happens when the driver is built-in. So should > we just always return 0 immediately when we find this? Thanks for the catch. Will reflect on v2. > > > + return > > return 0? Agreed, explicit 0 return is the better. Will reflect this to v2.