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 35BA9C433F5 for ; Mon, 9 May 2022 11:52:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233310AbiEIL4b (ORCPT ); Mon, 9 May 2022 07:56:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53208 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233271AbiEIL43 (ORCPT ); Mon, 9 May 2022 07:56:29 -0400 Received: from NAM11-CO1-obe.outbound.protection.outlook.com (mail-co1nam11on2085.outbound.protection.outlook.com [40.107.220.85]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B9402179403 for ; Mon, 9 May 2022 04:52:35 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=JbL1P3dACmQ0yqfYUhO8lNmJnqi8qsDr0GlIUprToPBRSlPeC3NScOa7IGeWPnBVG39sCLEtIyk9sOeORJ5q1eXl8Zs4Z0vMs9oTHUuWVYIf2JuEPmtPbLtl/7qtrpghIXlb86afOBBlJCKXvC3Agq6mghfO4emO77XAz4F1/CNpf4ryVzDk3pqRaNyUkHwv629WfHGvmLZZTQ9OBP4DzXSUeNIlPDMOcQEs+X7NArIpk87f4q7XTPnoeMMGOw3TA2NHE4Jh1+G4LK7/zyyN/b1jemLOnqUuizQ0ilgkUQqabcuVWhGlklLudT3KoHTxIPU4W8JQ39/+Pw/OGJwxDQ== 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=ch1o7LUA6wPnS0BhNLhx29GFVWByJFNay770vRVl3BI=; b=PcYmnMyVZ5Q85Gdxwa8RuaOxHllHGMG5d5I+cfpKvojaA2u3Wxcaf/QWCmxJEp3i/S6hys5qh4GSSh76L3bk7JoXqx0ZZ5CEybFs/u/xP/4TdSF+7uCM/IffUu4SI3YHZKVvQtmP9SjUFCF7Ybbc69EMfXqNaBvzjwQJQ2RjuKb6PaxWuWrpXAGEPiYTTPlmo2wubTNa4wZkXwS0/+RZOKG/juXvsq5h27nfmi9SI/8wwi9l9WaVGpx1Se9lW117wOCksq3vAuesJtTO7czf39vSB5TFmXCz5alKrbm7BZT5QjNKfqZudOTcSXA4uyB8sFZaE3TdjK7FUHsZCGkGbg== 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=ch1o7LUA6wPnS0BhNLhx29GFVWByJFNay770vRVl3BI=; b=T3JId86FZh73mtYi3aP7r2hSvZYhSsp4QcznkZBcgkeSyz4ApDStvsRtlzl9eRQvQgZUR6M2gR3bSNsIW5DmTQbCNAxyVfGfntX1ZbGs0+2EemBsWWK9pdCTs7mZzYSweh1ZMbi/jeQr3LmF3RqVCarxIPx4zQ3Pe4ivWwZ9kqnjR7glv6SRbqPWrEf+hPIe2beAM3XTAM/6nc3qsFMV4zTC3x9d5p9khsiPkitzY1ixxZRkuXnM45CaG8jbuaWNSUcs8YFAhYAOK0+3A52jykA5P8j3OYntjCMzRLU7ZxCWaFPADXkRIYsI3K/r3Dr2zJHRNRzuS4BlQ2saSjJYwQ== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nvidia.com; Received: from MN2PR12MB4192.namprd12.prod.outlook.com (2603:10b6:208:1d5::15) by CY5PR12MB6132.namprd12.prod.outlook.com (2603:10b6:930:24::8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5227.18; Mon, 9 May 2022 11:52:34 +0000 Received: from MN2PR12MB4192.namprd12.prod.outlook.com ([fe80::ec2d:9167:1b47:2db2]) by MN2PR12MB4192.namprd12.prod.outlook.com ([fe80::ec2d:9167:1b47:2db2%5]) with mapi id 15.20.5227.023; Mon, 9 May 2022 11:52:34 +0000 Date: Mon, 9 May 2022 08:52:33 -0300 From: Jason Gunthorpe To: Zhu Yanjun Cc: Yanjun Zhu , Bart Van Assche , Bob Pearson , "linux-rdma@vger.kernel.org" , Bernard Metzler Subject: Re: Apparent regression in blktests since 5.18-rc1+ Message-ID: <20220509115233.GI49344@nvidia.com> References: <4b0153c7-a8e9-98de-26ae-d421434a116d@linux.dev> <20220507012952.GH49344@nvidia.com> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-ClientProxiedBy: BL1PR13CA0232.namprd13.prod.outlook.com (2603:10b6:208:2bf::27) To MN2PR12MB4192.namprd12.prod.outlook.com (2603:10b6:208:1d5::15) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 9e8175bb-63e0-44d5-4710-08da31b267b4 X-MS-TrafficTypeDiagnostic: CY5PR12MB6132:EE_ X-Microsoft-Antispam-PRVS: X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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:MN2PR12MB4192.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230001)(4636009)(366004)(316002)(508600001)(966005)(38100700002)(6486002)(8936002)(54906003)(6916009)(8676002)(66946007)(86362001)(4326008)(66476007)(83380400001)(26005)(6512007)(6506007)(1076003)(186003)(2616005)(2906002)(33656002)(36756003)(5660300002)(66556008);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?9z9T/4WZKfVLLdnaYF1+ExdUvMOGHQRrmGk3ne2d+oXvt5lyNMvEN6N2HCmI?= =?us-ascii?Q?VRvCEeQBzIQF8Ig8Z7hYZM9For6wqHA5F5SfbePFBpqZzYsQefQE25V3ZHKV?= =?us-ascii?Q?d1XFmgZzcHa8KkC7cT223Bq9nficdAkISlIf1/Wnhr0BPnV/PY/ZDnoSCqk5?= =?us-ascii?Q?UkUwqG7U+DZVAiIm8poUYMtxkqkCqjC4cg7ueq8h10U2fQ9rl2vZXO09/ynK?= =?us-ascii?Q?7V7g5xQ1ia+r7zOMVQenvSUNb/Ek7VvvzW9VCl7liQ9YV5yKJQKqV7YZiuGS?= =?us-ascii?Q?6pppjCCTo/tTjDis1tk0a8Xg/nCy2d1Hpdatq7fKyW3kyDsWe+mNQcqFqvyN?= =?us-ascii?Q?LhQQLQCoHiJP3ZtzJ77Z4E7qD753bxXktThahH+oNyLdrF1KmmvBn1gVf6Tg?= =?us-ascii?Q?Yl3n9XwZcwZ3obJL0csaIh5N7Wh5f+KSwalpVJxs9a8iYoMP9HAP8L9Ijf0/?= =?us-ascii?Q?dQNIgc4bj6cBwMGYBCQgPus9eXLGKyvsPtD2tIGsDiQTn7a4XArQFmBcYDbL?= =?us-ascii?Q?FuxmH4QpxLz2iS1K6XVrby1oT3rhmUybO+jPDiCAdU9nP8nrERdjsCUcTfi0?= =?us-ascii?Q?HlsaPZKqV0lara9RST8jT8qvd2IHRusFCTJ8nabgp0onuWG3r1S2NdBF5NWg?= =?us-ascii?Q?5J/tbINpMCJ8KzT7dY52vre25G+O0AslwcKtQ2rb2byxc+Tq/9J00oBc8T6E?= =?us-ascii?Q?oidzaWHJ7GVIFgx9LJ4seJyjb8RohQYygraQkd+76n6Cw0EcETL6PLDU+Nsg?= =?us-ascii?Q?OzPaQG3eglH/WxUdXRmvYmSWg453hOtAosNPAYNN8cQlNxH+1mah83jQoMRU?= =?us-ascii?Q?aAElA7A4ciyg/rHQjRPgEWjtR+wDDMK0/a33SD/pTcWQbPWtYrIiHrrq3YX+?= =?us-ascii?Q?qAwaqccSDKkPWDVyZMy6uGGLXR/fuS7jvFyG80oDr3x9hZmpmdTm+JrtIALT?= =?us-ascii?Q?UNBHJihlDxU+dPPOSRWtTiv3Gmaqk/wvPDhCiFv7fo0xYN2mArMdc3nc6TM+?= =?us-ascii?Q?gC7alntQNXa40hQsuUIvzCj0HQOMtq7IkFYkfaRdnA6eZ7tUfp2x247yMgpy?= =?us-ascii?Q?Xc7EqtU0jl71y82aH7oruGv5TJZmZcQAXZqah73Igoe1aHUxg2l4mcuXwP4p?= =?us-ascii?Q?rIkOo4BD7aO3D2FACN9rexPxGxT+FOcB4SyZcvtTTkv7z0PMj3E9xWHfK1DF?= =?us-ascii?Q?tI6KgXbuXy0pDHP68tKnDglZRPaHmdSIgeEgFE/rdb2OcGaPM83JyE5z5i56?= =?us-ascii?Q?jkPjTuGwNv3hXdRkJiJtlEwgE61bpWfnA+rj+hMt0nsu1C71BeWH0WNmQHse?= =?us-ascii?Q?hTGPb5VE414Xf3MqO/Gb4MB1LH4OWBYIw2BF/iF6FFIV/AFljD/LOdvZ6wCA?= =?us-ascii?Q?kDSiAh1JK54p1qMNJutaYkLFFCzQerCMSvJY6v2oQleN1Ba6nSu6o25luzRs?= =?us-ascii?Q?ozQ7pi7aXqlI4SmR+4Lc8666KvAE19h7wh0BNtJZWT2y3w/+8oSjtJpp32ov?= =?us-ascii?Q?IHOaIH/fgLhu8DKe/Y/ZUniP3BHQCqljAhrwUJlBN8TpHrX/wjVd1dbV65Fd?= =?us-ascii?Q?MBahmIeLIg+plGC18h2XXUom49yM9Z+sqxBx9ojo4cgfLm3T26p+zK5umoXW?= =?us-ascii?Q?YgGsTLsBaM/C09Jo2xHDDwTsAdCckVV8IlCenFMMJFt9dcW1UMhCMK7TAznb?= =?us-ascii?Q?zNmifI8v3wb4G6BpEIBsNqLEcy9btMzE74fFV0Hk7+TMPfbmzoMA6o9wKSi3?= =?us-ascii?Q?2USJVBXBFg=3D=3D?= X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: 9e8175bb-63e0-44d5-4710-08da31b267b4 X-MS-Exchange-CrossTenant-AuthSource: MN2PR12MB4192.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 May 2022 11:52:34.1560 (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: KEum61RSi/vC7+MV906dCkyVCFySYaldBvx8sRsZll7tgVGG810tM6IP41Y6aAtt X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY5PR12MB6132 Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org On Mon, May 09, 2022 at 04:01:19PM +0800, Zhu Yanjun wrote: > I delved into the above calltrace. It is the same with the problem in > the link https://www.spinics.net/lists/linux-rdma/msg109875.html Yes > So IMHO, the fix in this link > https://patchwork.kernel.org/project/linux-rdma/patch/20220422194416.983549-1-yanjun.zhu@linux.dev/ > should fix this problem. I'm not going to apply a hacky patch like that, it needs proper fixing. > And if we want to use BH, it is very possible that the problem in the > link https://patchwork.kernel.org/project/linux-rdma/patch/20220210073655.42281-4-guoqing.jiang@linux.dev/ > will occur. > > And to the RCU patch series in the link > https://patchwork.kernel.org/project/linux-rdma/patch/20220421014042.26985-2-rpearsonhpe@gmail.com/ > I also delved into this patch series. And I found that an atomic > problem will occur if we apply RCU patches onto V5.18-rc5. > And because of the atomic problem, I can not verify that this RCU > patches can fix this problem currently. What is the oops? Jason