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 4F01BCAC59B for ; Tue, 16 Sep 2025 19:04:49 +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:Content-Type: Date:References:Message-ID:In-Reply-To:From:Subject:Cc:To: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=haBVIc9w8NwxkC+A3yl/n+YSrrlsDvyU3z8lZMHtM6A=; b=i78qTX9hsZJTXhlm2AZLS/7Xpl Zyh99quh5cGHo6CnQcS/Cr/B4COQv9vnI+99ZZ4RxAvRMotVQC9m2R9wBSbmY0VYXdLItPESOJSiG 5dMpj9hHv3XG6qE1Niq2b2oHyQcWyHAjd9z+WFEWoKNxCiIlLhOo4E/shhLjhR4C8+UlXYqK0jQKy o+vgWfZT3RueyOr8/bw3hYkdYbHLcbMMlcahX1txAV62yGx6wrmEnnTLiFs5oclHJUZtxne0KQUMH c0Uu53RDvpPnqLB2NvfuB5Xs2haqL9geFiv56X5DINNA8omHTw/To2rLc7lApS92EnAjWKZgD9ijK Lyxe3prA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uyayr-00000008pIO-2Cpk; Tue, 16 Sep 2025 19:04:45 +0000 Received: from mx0b-00069f02.pphosted.com ([205.220.177.32]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uyayp-00000008pHD-11GC for linux-nvme@lists.infradead.org; Tue, 16 Sep 2025 19:04:44 +0000 Received: from pps.filterd (m0333520.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 58GINMF0006703; Tue, 16 Sep 2025 19:04:33 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=cc :content-type:date:from:in-reply-to:message-id:mime-version :references:subject:to; s=corp-2025-04-25; bh=haBVIc9w8NwxkC+A3y l/n+YSrrlsDvyU3z8lZMHtM6A=; b=I3TFgdXBXFjta7bScC6kJ6syS5yCi3VMAH +Y7HO1t1vEiR9R6yHm5bNLp86vg1rrdlQJeBtkpfPBIWCU7Uqigf3zA9ZS7MZIGw 0/IFtLxYk7h9f5BHTAxkQ3BMe9f0hWL7MBohNYAYtR8E0EzLGIK5YZZAJnsRVAyj fkG7/GzJZqlP8Gd89UbVZLPlmUDorICxA2aVMq9/k3QDRah265KYnN0Imv702FaG HYy4KRUS/6P3kRWPow+E5mHyKZ6KYXXyEz1c71zcDqyWPcf/SMH53d0YoBnljQkb YwXBKnMYeLyIiFEb+9GzL+at3ZEdthJRVis3nVBBnbTd96ipHdwQ== Received: from phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta03.appoci.oracle.com [138.1.37.129]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 4950nf5fh8-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 16 Sep 2025 19:04:32 +0000 (GMT) Received: from pps.filterd (phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (8.18.1.2/8.18.1.2) with ESMTP id 58GItCGR033679; Tue, 16 Sep 2025 19:04:31 GMT Received: from bn8pr05cu002.outbound.protection.outlook.com (mail-eastus2azon11011040.outbound.protection.outlook.com [52.101.57.40]) by phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (PPS) with ESMTPS id 494y2csw99-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 16 Sep 2025 19:04:31 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=tBPRQlW+sguftD75RHlhai/Ob3C5tsNGBSPhl+Gkf9GcVYOp17zdC5/IJPVKkPudhqleQKRRGgofeAsUM2qjhzcO8q7kFm+0nLbUSTRAy+zHageKOKygITO/rJuZR6usbBQSogCCJpjDYZ6mcLJYDIk1flOVMYxo3GiwEB6PQ+eIBWXXqyDgKJ6zFG05V5JrgGxi7ME/uMh8MrS4KW1hRPV6ovvQfowuGLQcUfGPRJ3nt2oETTWFDqVbWw8G77lHF5lslPYhXZH1A/FRQcovb33MM5WNZLMlmm+P/bxVYyfmjWtLGZs7ukFx6Uqd/BeEEKk+hUvqigH4/1Cbtir6lw== 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=haBVIc9w8NwxkC+A3yl/n+YSrrlsDvyU3z8lZMHtM6A=; b=SFnITup0/IBPkZnqo0P2PjSjXfCkYtMoR40GauU6pUsSjwEBWsb64Y6UhWZEP8MbxK37xpIyRh1XdsDT5euaFEQhHwNExlO805ptHZ03OELMx3Ol3PumXMYTbyhr4fijmjPTMXcgjtDoiZRw5HG7S4bUoORVGWBnHX8kYjIZFJApM+rwxN8DiHYEWUy7E7tSphYosmyhLqd8QguOUT6fmmlEnTWf5sSTyu+PGpc49LOSIoAnc0zkpNqNRBQ5PT/J95/FcZOurDQpBwN/j2fC+qoOJ8XED9JuXQ+sxF+RnUs8pkLIo6Gmupte85SfD9bV7D5CioPo4faVorQjk6mByQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=oracle.com; dmarc=pass action=none header.from=oracle.com; dkim=pass header.d=oracle.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.onmicrosoft.com; s=selector2-oracle-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=haBVIc9w8NwxkC+A3yl/n+YSrrlsDvyU3z8lZMHtM6A=; b=tPWWvKWOy1Yfd6BA5e2PkceEMfRRfwU/nOa1Ht6PSwuTvSI7dVXoRV2aaVHiESxlEsyx+icDeaFQP1P8rTUrUV17pCWGHx03nBuxmOtIgoZ2kJ9f+/z6ynDk/NNsTwCPm4SmiwcqXEKV6mj6u79ZvWPzLsSmHFR3yy+jP5a10Ew= Received: from CH0PR10MB5338.namprd10.prod.outlook.com (2603:10b6:610:cb::8) by BN0PR10MB5094.namprd10.prod.outlook.com (2603:10b6:408:129::5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9115.23; Tue, 16 Sep 2025 19:04:13 +0000 Received: from CH0PR10MB5338.namprd10.prod.outlook.com ([fe80::5cca:2bcc:cedb:d9bf]) by CH0PR10MB5338.namprd10.prod.outlook.com ([fe80::5cca:2bcc:cedb:d9bf%6]) with mapi id 15.20.9115.022; Tue, 16 Sep 2025 19:04:13 +0000 To: John Meneghini Cc: "Martin K. Petersen" , Hannes Reinecke , Keith Busch , Bryan Gurney , linux-nvme@lists.infradead.org, hch@lst.de, sagi@grimberg.me, axboe@kernel.dk, mlombard@bsdbackstore.eu, "Ballard, Curtis C (HPE Storage)" Subject: Re: [PATCH 1/2] nvme: check duplicate unique identifiers in order From: "Martin K. Petersen" In-Reply-To: <6791b6cf-9f54-4f75-bf78-7ce513902351@redhat.com> (John Meneghini's message of "Fri, 12 Sep 2025 16:32:33 -0400") Organization: Oracle Corporation Message-ID: References: <20250509151627.20434-1-bgurney@redhat.com> <1352e125-180b-4ec9-ac3e-1cd8570910a3@redhat.com> <6791b6cf-9f54-4f75-bf78-7ce513902351@redhat.com> Date: Tue, 16 Sep 2025 15:04:11 -0400 Content-Type: text/plain X-ClientProxiedBy: YQBPR01CA0146.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:c01:7e::14) To CH0PR10MB5338.namprd10.prod.outlook.com (2603:10b6:610:cb::8) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH0PR10MB5338:EE_|BN0PR10MB5094:EE_ X-MS-Office365-Filtering-Correlation-Id: e3e31e26-b340-460a-d17e-08ddf553d33d X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|7416014|366016|1800799024; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?QreZH4R+PAPPa66fCrBekAtrgYJxirdnaLG/NVTo9u9Gz2iet/nDZmpCfnIB?= =?us-ascii?Q?SXgzxYRR3gXpsvvuCpDiz5mG9b1ajvFWvbZkBV9kGwdlIS3qzqOMl581RBge?= =?us-ascii?Q?fnWX6kbs8oXtSqFbjbBKnEr8g4eqdmN43jyEbbPddmWfFsp7jnRh9SzXKwxr?= =?us-ascii?Q?aqxYcySOv4onnf9JS5WpD2UXtLVRD6fZExSZ9iQpD3HDwLs6UGDXpIvWe2wJ?= =?us-ascii?Q?dA3UkF1zIrTSo9CVWE47b6oew4ZY7vyWuef8gWwhqE+5t6EDfxZ/oHLTP5kc?= =?us-ascii?Q?Y55AM7iY4qCuqLcwR20W33oxlvslMUjksFdz117d4YRc8qqGQBVjpmHAxZHu?= =?us-ascii?Q?DP3NAJMlbScPNVFrq4QY5VLi71Boy8pUyXq+65/lhwvnu0FjHqT05G0PwzVO?= =?us-ascii?Q?rcs7NbuLyPvYVPJOBL/m8FO53m1huS+ufJNON19/ScbCC/8pYyXnlNNaD6X4?= =?us-ascii?Q?/Ny8cFZOsZF1do3oXmdRjScK2CztRu1guUphvJxzHUgddriRwsoMx85o9lx2?= =?us-ascii?Q?yzUyp2bNol9QxF7QqktRDidaJDQASTRpW1u0Dc0J6XE6kUSFsUj0xwece4FR?= =?us-ascii?Q?8AXO/vHeEYdRV+XpANdeptFV8A/r6+ZXlLBZXJG2Q4wBtZH8YYOWHUChMtjD?= =?us-ascii?Q?/a86rDCQo9MzmOj7IMSZTQw4TcQE6wgj2smR6b9iWd51jIFMe50TmD2o8iJ0?= =?us-ascii?Q?fzHIb1ycBcyc+TZaemKZ+sLkwkU26an9eHW7OwKoLWEV9QayudSw5fGtMXCp?= =?us-ascii?Q?Za+NNjLKnD6TLZ7dEAP9dmtwEU4hdH3TosnxdyWUcn298FazR30ozlU4vCzQ?= =?us-ascii?Q?hbk8UvaROkc/3apTTiaZ13sugZdvoS2nNz5kZb2XVnZ5pleuD5coe3C73g/j?= =?us-ascii?Q?5vHuYrlr0ETFEu8R5Lz/Jz5UwuEZ7eeRBopECr8KSKouk2wz1Iy/MbupCvAx?= =?us-ascii?Q?At/KY+EKe4lreR1i4kqM9gnREwpcGaOEYw0h42oTnoPGWcd3T0wEJ0Uw1vHe?= =?us-ascii?Q?9pNmrQsOToPFG1YwE9fIGHwBs8CUf14d7fawGxl5pXsm4qiQXqzRwWOnmeDa?= =?us-ascii?Q?WOnBqhYMVwIbDXlhaoo4uZqF6SuV/JrDZU7AQ91H8c2BMbhM/vJdFryLch8X?= =?us-ascii?Q?0ZntMYYLIGBEJzrY6D9H4YVky6EX33AX7PoYj/vHRsY27v4EH3oF1oRncHpy?= =?us-ascii?Q?uADb3O9VC23/HZ4CkOfpJAR6WxzI5OsePKSFqFGs/azNnWWLpzYK3xq08PBW?= =?us-ascii?Q?mzZUKGUJwgu7MleszyZBnWtCf9k4AVrWhO4QVibm7DIACQaiVdMCWEl8HjAM?= =?us-ascii?Q?lfmWz9uwhirmoZZM+PLOP/o4NXTocjc/5Jyi5j2OousYpRZAXx67yQtkrXH5?= =?us-ascii?Q?aLAi7LA=3D?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:CH0PR10MB5338.namprd10.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(376014)(7416014)(366016)(1800799024);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?h19gF4zdBHECEipVz96yUJSxNnpiYI0M36DeBwxxdR8c29uLojPuG45yD5x+?= =?us-ascii?Q?bQegyEJsbyckdeP7buaFAsvR40nEtdFwKD56RqFzHnHyrPW7cc1EL+E175YF?= =?us-ascii?Q?brR7VQo4TqlFry1++uyF0atBrrGk5tt6cEFDRLM41kGct0HwYxG9i42GA484?= =?us-ascii?Q?fNDa0+G4qFmmrnaQBTOn3w+38VC0pzdVTRF80OClwdJlHjf476Yz25oFT+Fn?= =?us-ascii?Q?7xbAill7yECMpPoeC0cII4FbfiqX0S+RggZ7P5fuZzRrrT/iqRTrYNVdJIVV?= =?us-ascii?Q?31UzbYd2KwfVfUjsaNooAuhhUh4aSGCx4kCFDBTXOIh98BvM+QnkgPt8eFoE?= =?us-ascii?Q?7pInxsEJru3BmA1nICFnq+yfo4KVhZ36LTPf0SX17LyqDWhQ9MP+EM6Q4UV5?= =?us-ascii?Q?iDr3N7tjr5exdX2H+HeV4NxmYHD151FmfD24ndtwK2INF1Iljjts1CkRC0Hn?= =?us-ascii?Q?M+4oTA792qmAp1eTtgPwWJiuhHGfL0LtsAN12lqLGYv/KCU7LeAjbY5+MW0t?= =?us-ascii?Q?hZdiKWolX0cE2IRDwfQAR8Ix+hK9piy8dRomb9MvQiA0n6ARAN7XRJX0GOvR?= =?us-ascii?Q?14qln91yS+L/4sh0qb06doPR41Tb4+28I5aqZADyWbw/yjmGm3ZPHySQ4Jev?= =?us-ascii?Q?GmPXH9VKrkF2xC1jUDomYAfSRjLR2oinNNnyC55H1sj4G4gTQNV18jwBzJ5U?= =?us-ascii?Q?gDFuZUob/KBGZAoAO7lPsZ8Zu7KCEu8z96zI62haUQ6/NzxKOwbwGcCS1Vgh?= =?us-ascii?Q?IFYMYUB1+7ro1xjOyX2YIk+qK+JSDJdhvJcaokFyr3dk1SbH6ut3kmJm96Rm?= =?us-ascii?Q?7Z7HhveS1+I97D5u/pWRGLkJmZNpuNcphHanATbhr0BBivHDdRF8+Omf7vEC?= =?us-ascii?Q?mSqbzbcNxJPJCLEKzrqXKLapHtVP+jZGbLYj65vDIhAnXSNf948dFh1Zg79t?= =?us-ascii?Q?tHbILwa2FTogX7CO3DrZUpHrQz6oJ4UAj6nBv6XjeGvJ71yhDN7rgrLcIV/2?= =?us-ascii?Q?fUpQoCukzZmaNkabM1rDHOhrutAoVuVZud6OGtKVzWf2w3qQTkC/5m0LxSTz?= =?us-ascii?Q?AARM2P32gfL/WxyqM6UhynzcswQHgmx25TMixyTblKzp68xiWnLVqH0Hnjy4?= =?us-ascii?Q?MPGbSKjd8b3iswCQptFBV1K0D6X4T2RP1LOi0sfNW+jCMyDpsg96QwqZt5uQ?= =?us-ascii?Q?nNxxoIf+dWrU9bGjFVPfMWwTkU/9ndpIpjZQtq1kCNp/3RRTspoQHZPJqehv?= =?us-ascii?Q?ZfMW7MfAHDK1U0N4zyN9Al5ozojseq2wU80LR/qUL4p4L4vqiWHT0N8D22Qi?= =?us-ascii?Q?m4OJHlN5saINtVcSvA5I1LcSsNi4BQkLzQxJiM65P/yvsTfS8qoomHlwD0m4?= =?us-ascii?Q?/jNInRn/Hf0c27CvU4JjCoDGa9vREDwTYsKPsqmAwkaRg4K50PiCPC7Sf5nL?= =?us-ascii?Q?WITONH1h86kMv9L3m2K8V4J4xE7ZNDpQynggOHGN7xNoXFnetyG88M3j45aW?= =?us-ascii?Q?ptDfgwvjpNNA2FUxVRAY0VHrHGmXt6HzPXLcaGx2hLfc5YbQlR8nfz8lIZGJ?= =?us-ascii?Q?8BtOX9Yricuh7n/zYtMCI0k8lnB0pAfN/iVguRQ3w0lC6LQtQ9GukDu7QC0O?= =?us-ascii?Q?XA=3D=3D?= X-MS-Exchange-AntiSpam-ExternalHop-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-ExternalHop-MessageData-0: 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 X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-Network-Message-Id: e3e31e26-b340-460a-d17e-08ddf553d33d X-MS-Exchange-CrossTenant-AuthSource: CH0PR10MB5338.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Sep 2025 19:04:13.4621 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 3Kqit4eWkN0BE30OWE/tu7riRi1SSLPKdsF7Z4KULGgpP80uNUV36MCC4vPCug9P7h/Z0RLO6ooAam5dmlLMXOiiVkteReCNgI8mCuJjexw= X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN0PR10MB5094 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1117,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-09-16_02,2025-09-16_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 phishscore=0 bulkscore=0 adultscore=0 mlxlogscore=854 spamscore=0 mlxscore=0 suspectscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2508110000 definitions=main-2509160178 X-Authority-Analysis: v=2.4 cv=S7vZwJsP c=1 sm=1 tr=0 ts=68c9b4c0 b=1 cx=c_pps a=WeWmnZmh0fydH62SvGsd2A==:117 a=WeWmnZmh0fydH62SvGsd2A==:17 a=6eWqkTHjU83fiwn7nKZWdM+Sl24=:19 a=z/mQ4Ysz8XfWz/Q5cLBRGdckG28=:19 a=lCpzRmAYbLLaTzLvsPZ7Mbvzbb8=:19 a=wKuvFiaSGQ0qltdbU6+NXLB8nM8=:19 a=Ol13hO9ccFRV9qXi2t6ftBPywas=:19 a=xqWC_Br6kY4A:10 a=yJojWOMRYYMA:10 a=GoEa3M9JfhUA:10 a=NW8-NIpsAAAA:8 a=2O2Eigh4bJi7yZCtVpYA:9 a=FTAPkevyI8KQvgyCdMRv:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwOTEzMDAyOSBTYWx0ZWRfX+L0P1Zu0Wdo1 Bz4t5YJKtAVXrN3UrM/LOpHqgz4L0C5XZMtZvGxqIDm5ONh75bGTLSrEJpp1veiptdnscndhuq/ oUR1Wwz3PS928ug7anNtb7LGOre0LzFRqKLsC3JWPCxE+8dNN2uAUjw4y4x1UX/jZTnDn+u3L8s cBxhFPP+TpWHhoknqr2/RQRI3W/ulzyaEbHraTw2j3FKVNyX16oKzFeQ3TGCysTLK/oIVO1AD/H EF1No9K4L1NuGarGJtmxbNznmDfA0Jn4uC+ilqD8JpYXKW5UUaJglWBgcYkuqEZM2jrZgH17pJK 74vb8V8vziZPH3J0Z4pXe0NUjCqQizFlMaJlaYuYmQgPh9H53LdqIZKWvEFqi3tQaEbh5ikWlgE /eiLBUJ/ X-Proofpoint-ORIG-GUID: QSEDndnaMoW7VpdisVLbdMjsjDuN4OBP X-Proofpoint-GUID: QSEDndnaMoW7VpdisVLbdMjsjDuN4OBP X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250916_120443_406991_FBF0DFA3 X-CRM114-Status: GOOD ( 14.27 ) 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 John, >> The issue is pervasive enough that OCP has a defined EUI64 workaround >> in their SSD spec. [...] > https://www.opencompute.org/documents/datacenter-nvme-ssd-specification-v2-6-2-pdf > > Is this the specification you are referring to? > > NVMe-CFG-7 > The single default namespace (see SECTOR-3) shall have a unique > non-zero value in the EUI64 (Extended Unique Identifier) field in the > Identify Namespace data structure. For each namespace that is created > other than the initial namespace configured in the factory, the device > shall clear the EUI64 field in the Identify Namespace data structure > to 0h. Correct. I suspect there are a bazillion deployed drives which suffer from the non-unique identifier problem. And thus the path of least resistance appears to be to avoid reporting EUI64 for subsequent namespaces after a firmware update. At least that keeps the existing EUI64 stable for the common case where only a single namespace is provisioned. -- Martin K. Petersen