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 5EDDAC05027 for ; Thu, 2 Feb 2023 15:42:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: Content-Transfer-Encoding:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:In-Reply-To:From:References:To:Subject: Date:Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=qd5bHlyWmnIDnsQiX8FoaOAR280lRorZd5MztqNU1FM=; b=SLnhMm1TxhIOn72w1K7pcTo5Ux iONxFINiDcAdoVQzSP1H50D38h88Y1raTYj2yWoO0Ei2GIaN2BvY109Fn3ZgqgL5pbx2MQEgXojDO pumZH+Bt53a9RZ0t0C636bBzl9XLBgUI/vLdATBo/j/iRkt5t6W9UwM7tu/7ZsT+dE1jNVuN/BeB5 WmCkDvWazVkb0RxRFSj1YVqNKVX5oun5QHKLfA3+O9JCamsRkV7V1ommoNy23mXFbSFNEdRPHDxoN Id+H/Q687bKJcOh+KnAfE2O8RKBMu+qLU+/iCeHjkIBbuH6PzW82/+3IKj91zZIVwjpzL/ktRZ8yt acPHOjUQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pNbjE-00GULm-7J; Thu, 02 Feb 2023 15:42:24 +0000 Received: from mx0a-00069f02.pphosted.com ([205.220.165.32]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1pNbeN-00GS7I-5E for kexec@lists.infradead.org; Thu, 02 Feb 2023 15:37:25 +0000 Received: from pps.filterd (m0246629.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 312Dx2WC007457; Thu, 2 Feb 2023 15:37:13 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=message-id : date : subject : to : cc : references : from : in-reply-to : content-type : content-transfer-encoding : mime-version; s=corp-2022-7-12; bh=sbgU2RA94orvV4BZxlaer5lvSSFqQ0yPFPGBPnwGPbQ=; b=OmJGMcYxUUCK7peYXYwaPCRZ1RElWt+fdlOUbIEwuk7a2tKCAp95nBDBvAaECN5+lwOB UUdl1RvaHMDci7ic3oabM5e1A7estqTRCqgY+qA2u90w/LVM8yHjn+LYMyfgfzDsOIvh WkN4XoQQmVira+DrKsObuyqFNVamK23VRQFkTSX9z4Wg3RZELFH5dyG+1hKzTIeJVKPT dtm9gbFWp/+Mggo1U96s/xwv0z8RjX7N5RIMp9ToPjsqqiMt1boVYtvFjEEu9e/Ybl+/ opY5Qv8cJHcXFij8SrpeIb7E3xXW8fOQN4lO8WHRrZnA2ZFWhyK9p1xn+XChWR5JjCg8 Uw== Received: from iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta02.appoci.oracle.com [147.154.18.20]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 3nfk64bn04-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 02 Feb 2023 15:37:12 +0000 Received: from pps.filterd (iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (8.17.1.5/8.17.1.5) with ESMTP id 312EVkee005047; Thu, 2 Feb 2023 15:37:11 GMT Received: from nam10-bn7-obe.outbound.protection.outlook.com (mail-bn7nam10lp2103.outbound.protection.outlook.com [104.47.70.103]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 3nct5g9ysr-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 02 Feb 2023 15:37:11 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=c3iT9sJK50QpfWsXEJ+zO48N8wpcYZ/lH8YxhwqMl1Y5XzzI7IF1FALa+MralD8xVFAbM4t0u1JTsbDnUJ9eRtXBLGDCG+UwYUMB9IjFPAqnDBJjafYjTlbYbzUiwX07q/01muwqbbNNu9J/tLdftSkrAWRh0kT/bDePEgSEGIUEQ00cO2QZkmqyoV/fYrCtMgRam1ZaE81OZ4Q7sR59eEemY/yvxmdczVv4FNKp7nMD84XQ8oSzrTR6/Rw1X8UY97NSMZ1Mi2+LFlaYKCuhA3/a6U2Fcixb6C10zWMT686gOzwM2wkPEK2j+6UGquGZSpsTPvIrNv/6RV3qNRwY7A== 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=sbgU2RA94orvV4BZxlaer5lvSSFqQ0yPFPGBPnwGPbQ=; b=lk/IOCXLOqfFbYVwp5CUp2qUaEkCL/i+TG2cRfS9SRLLqrtpJVPRDhHmChizvc+3JkVr93hd0ylaLs73oMaiO19HIUwYJzGSsn43lD5xXw4fy7YvxiZ13wBLrlRCnhFUHMh98S8WYHU5K5qZ3BoIps5txYyiJzcCLJeOH7RrXpi0exw2C2uzukZhBPr0N9LA0Tqo9oiZHsjHDl4JyILvLAGAIxd8dmYy7NjJ38lFdQS9SY+H+7sVBxK8Msx+2uwH7wDSBxa/WEoYdezp1Rh4G+6OabdrxPuOO6+f536Dnuk2t+I3e0tOLA+sqU5QmZ4RmG/UkZTY0Y5vRk0QjUtWgQ== 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=sbgU2RA94orvV4BZxlaer5lvSSFqQ0yPFPGBPnwGPbQ=; b=o8hytrzTa+Iw0pBQzrj+5W6bexxpH4jQe4pj2pR45w51HJZnKV6mUbY8gsXg4Ekb80u5RevuWI+rzPppr07OgIIpLjvFLq4n8SI5Bf/RoVR2A/NbGl6VFEiv+f9KeNkcJnKPBK6n9PHF5am8kVJazYMwxBaeI6BO84cnlcTvuik= Received: from CO1PR10MB4531.namprd10.prod.outlook.com (2603:10b6:303:6c::22) by IA1PR10MB6145.namprd10.prod.outlook.com (2603:10b6:208:3ab::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6064.19; Thu, 2 Feb 2023 15:37:09 +0000 Received: from CO1PR10MB4531.namprd10.prod.outlook.com ([fe80::2101:3ed8:9765:370f]) by CO1PR10MB4531.namprd10.prod.outlook.com ([fe80::2101:3ed8:9765:370f%5]) with mapi id 15.20.6086.008; Thu, 2 Feb 2023 15:37:09 +0000 Message-ID: <401813b1-9834-f8bc-e035-2fef309d3fa6@oracle.com> Date: Thu, 2 Feb 2023 09:37:04 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.5.1 Subject: Re: [PATCH v8 4/8] crash: add phdr for possible CPUs in elfcorehdr Content-Language: en-US To: Sourabh Jain , linuxppc-dev@ozlabs.org, mpe@ellerman.id.au References: <20230201063841.965316-1-sourabhjain@linux.ibm.com> <20230201063841.965316-5-sourabhjain@linux.ibm.com> From: Eric DeVolder In-Reply-To: <20230201063841.965316-5-sourabhjain@linux.ibm.com> X-ClientProxiedBy: SA1PR02CA0006.namprd02.prod.outlook.com (2603:10b6:806:2cf::15) To CO1PR10MB4531.namprd10.prod.outlook.com (2603:10b6:303:6c::22) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1PR10MB4531:EE_|IA1PR10MB6145:EE_ X-MS-Office365-Filtering-Correlation-Id: 0b6233c1-3bb4-4288-1445-08db0533587f 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:CO1PR10MB4531.namprd10.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230025)(396003)(346002)(376002)(136003)(366004)(39860400002)(451199018)(53546011)(38100700002)(31696002)(86362001)(36756003)(2906002)(478600001)(6486002)(6512007)(2616005)(83380400001)(186003)(6506007)(31686004)(66476007)(66556008)(6666004)(8676002)(4326008)(41300700001)(316002)(66946007)(5660300002)(8936002)(43740500002)(45980500001);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?eTFVRHBoUXFuTHRVQ0hhZVpvUmRsWjhmVGVyVngvS1JOZ1VKYjdQY3ZYeUxa?= =?utf-8?B?UWlxbm9Gbzg2dzk5a1pndDlhSkIyMVhUT1ZZZmFMRUFJejB2ckc3Z0xLQkdo?= =?utf-8?B?VGRmelcxSFVNM2JtNzM4S2Y0dG9COFlMMFEyajcxNWMxMVVkQzloc2pjVHpR?= =?utf-8?B?TFJqT3lPMlBVM0NLMTI1M215eERoT3NxT3ZDR2hDQ0FaMFNQYWhmVCtRMHVS?= =?utf-8?B?MDc1SlhPY2ZqNTRGYzRqWHFQcGhkN3gxZFNvMkdHRmxLd2FkWmRTYlpKdUpU?= =?utf-8?B?YllyWVFiVzhqcy9ibkZTTDBRb25TSWJyNlFyV3dyUEp3S2lmS3N0bUZCWG1I?= =?utf-8?B?ZDE5cHJ3bnRwaVhGYWJSbHpLZDI4NXFzQzhOdzArek1aTVMwMEwwcnVxelhi?= =?utf-8?B?Ymx1dU5GMFpVQ1V6TEZBR3NCZ0lPQUhrN2RqdHlQQXhPQzFSY2hNcmVONnRo?= =?utf-8?B?WTM4OEZBbUVZbm92WSs2eDFMd0hZTlAwbFlZRDdkbTBFUXdiZGhPNXY2c2pM?= =?utf-8?B?ZEJiNkw3bmR3SjgzNTdMdUFaZDRDVnViU0VyUFZ2VGVSci9JdU5NQk5RMnc3?= =?utf-8?B?TDVweENOeWpCUmpqMXlsNnA0TXFacG5FS0lOU0dQdlZ1OGNJQVI1cDNkcnJE?= =?utf-8?B?TFRoRUk2NGdaSmhwRmdteFdmVXYxM29FaXFwY2l4MlBUY0VxRlpuTTFhY2I3?= =?utf-8?B?WnpyL0Q4bGc1L2ZMKzN1eVNFUWpWZ2M0THFia0dJZkpqWTdWV3BMMktsNDBV?= =?utf-8?B?NE9aeW5oOEJUSWhUZVRQeExEckpFMlgxdXpMVzF1aEc3Mm55U1doaFdPNFdr?= =?utf-8?B?bUdBUU9SUjZWcW1mUGhxRWtEUTNGUnJxbkNlL0FvRi92N0IwdHdsWTdNT25n?= =?utf-8?B?a0ZORmFacVpsZkNzRUFuWEYzUU9WWEVGeFVOd3JndXlMK2NGYzhZZUJlOHdu?= =?utf-8?B?SzhsdVNNaVh1b3pOZnBiTnVNdE00L2tzdG9sa3RpdG83YXZXbm1QWVBxYVFF?= =?utf-8?B?bXgwbS9KVU5iRGJPc2Z3T3ZuT2ZWNFkzUEhDcHF1M0RJVjgrazdLV0xKSVRE?= =?utf-8?B?UXQxNW1VOWZ6TUFjSGVxRVc0LzVjajhRMGNCVVRhd29Zd3dIR0twZ1UyOFdY?= =?utf-8?B?bU5HcFN1SDhZMWhTOVNpQnpTQUZKYVF5WVNuUFMreGR0ekdsNm1RSGRLNWYz?= =?utf-8?B?dkxVcVRreUpiSHdqdDlMSVRYVG1ibjFwWlZmdWhVYWRRdDJzT3NvTGNVWnE3?= =?utf-8?B?ZjMrdUZUQzlXSkVUa1dkTFVKQTBnaGRyYVpOdVhzMUE3RDhrVnR5VmdqQ2Zj?= =?utf-8?B?d0JEV3dHZzdVak1obW9WYWEzWWM1amFYK1d4OHB4RlBjeVpJZmQ3aEJBOXRy?= =?utf-8?B?TDdockI3OG9SRGdaTkdtS1VuRWludC9aOG92dVZ1dEVTaDV2UFNiVzh5Vm9X?= =?utf-8?B?cjJWODZ4ckl4c3BMVW9URFNsUGtFQkphVW4xZUR1OGlJQ2xpb3JoOUJSZDRK?= =?utf-8?B?TEtZV0lFQUtGT2d1alNteksxQndLTkYxclN4bkdBWXVuM1pRUGo4SHdBNUtY?= =?utf-8?B?YVcyWmZvME5IZWdHTytzNHJUOU4xbWV3ak5HQjRtOUhZRGR5Z3cxT1RNWVdt?= =?utf-8?B?aVN5WmJQKzNoQVlpRjlwN1hRRVhjMmNyRk5WWmFXRmVheis0ZjBzMEhUSzcx?= =?utf-8?B?di9FSGgzOG5nM0xLcGhpdndwTVFZTEdSc29Jb0wxVWhuUm5maXV0QmRhMVps?= =?utf-8?B?NGpTN0Y4eVFOdHhHS3hRL2NsSzdZTm50QWQ3WHhTTXdzelkvOVpkUnoxcXR1?= =?utf-8?B?ZmMxeUxYalF5aFNtY2x4VWI2UHdxTERJSkh6Z29hSmlKZm5BWTdaMlpwWUhJ?= =?utf-8?B?TEtUVHdHSkduc0djNHQwZ0lLN3ArcDJyMWRBOStLRGliT25VbHZSeXpsVVcx?= =?utf-8?B?Mm1uL2tMNWJHTU9BcCtoeUJMWTcyRE41R0t3S2N0S2FUalgwUHQvWFNSYkUv?= =?utf-8?B?QzNoRTNMUnU1c0lVdUcyQXc1YVc3SW0xaFloVlBYMEk0L2hQSDBXdkQ2WFNO?= =?utf-8?B?UUhPZVpLR09aenNSRENKMVBOU0xzS2Rzb2MycERmM1hkV0FiQlV6UlZCQmpH?= =?utf-8?B?ZzRGZFNJTXdNbkJQbDd1VUhGU2lHRHp5bnl5cFo0WWZDUzZLSkNyNDNHQ1dB?= =?utf-8?Q?LHQLEnaB400i9HpAx6HRMhs=3D?= X-MS-Exchange-AntiSpam-ExternalHop-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-ExternalHop-MessageData-0: =?utf-8?B?dWdqRDdVdVFZTVpKb3NzZkw5UUprWGRpRWRPVHVhZkR0eThyb1BPbVY5dVBo?= =?utf-8?B?UXA1cmx1cGdlT1FyRlBvaW1DVnh0KzBKNUJRdHE4Wm9wY1lOTHdudzErYXU3?= =?utf-8?B?ZkxuS3BLN0pHSmFuSUxVNDUxOUJieGNpNTBObWJzKzl5czFoM21LZXJCaUpO?= =?utf-8?B?cDhDYzlBZFZ5Q3N3MGxzSkNPbkVLdlRhT1pGYzRPdjc3aWhKLzdXemFSenYw?= =?utf-8?B?U1R6SW1nQlV2RTkxMldjRVNBMDNnTnYxNkVpMVVyTHBxTmcxQmVvVG9qOTAz?= =?utf-8?B?ZkVuWDNkL1AwNE5USlNqT0dRTGZEajE3eG5GcDZMUlV3dlVJcGw3eFN5VEgy?= =?utf-8?B?MmViSjhDSjFpb2YzT2NkV2phejNRZ2U1cUV3a29tMHVYckU4Q2ZuTm9kOEhv?= =?utf-8?B?bFlic2NzNlZJSjZueWxYa3NTTlB3TXJ2UzVyQm9Vakh4QSs4MmRTUldwSmZL?= =?utf-8?B?WW56bE9LSXNYZklnVTVBTHRvUStWamhmdXlhVWx0ZnVTVmhaSWYrVTVVVG5U?= =?utf-8?B?bGJ0WWkxcUU3OGNqaUVtdStTeStSS2JtZXgxRitoSjBwSkZBeXdiUEV4Ymp1?= =?utf-8?B?aWIxeXFiS0d1T0V4Q2QwNFlWTWhvVnNiMFR1SXRsYXFTemVqUkVxRFNoRG9B?= =?utf-8?B?dXZHQnpDQzF3bEtMYmh3RXYxdFNWWHNNLzYwZVQ4bHhwNGQ0T1VmU0xQVm5J?= =?utf-8?B?cnF6dm5sTUZ1SXpFNWxaUWx1WnY2clg4VGNsSUN3cDFpVkpxWGZsU1dSdjFT?= =?utf-8?B?bUVIQ0pWdXYxV3B1dHpVR0xBKzk5d2ZOa2JxaEdPejEzb0xJamNoYndtRnBV?= =?utf-8?B?a0I3OWF1ZXF6TEZNYlhOVXFKeGdwOWp0b3lLNjd2clJaVEdZNzRRUjhmYW9y?= =?utf-8?B?Z1J6MGR4b0k0QnRsVEYxT25NMWgvaVFackdSTkpURjJibU1TRUNCYUlEODN3?= =?utf-8?B?Z2lvY2Eycy94RVBKVGNucmxvL3BqTHZHSXF4WGJsZW9ueEQydjBhTCttNCtm?= =?utf-8?B?cUVvRWRSS3NEV0VNWXlzYzloZVlWU2RBdytiRTM2b2xNeHR6eHJNMktBcWNt?= =?utf-8?B?MUYvYkZSZyt3dkFDanBvTUNoM1k3QzVYKzg0THhodDMvSWxqM1FkdUIvNlpm?= =?utf-8?B?R21vVVpxOFl4STc2dWRHRGhDY3AwV3N5dDlQUndYV0l4cXg5V1NnQUFSSW5p?= =?utf-8?B?dXh0RjRwS0JQUnpibk9Vei9iNVFlREVyVDl4TlJReW1SUHloMmsvQzZ1RXJk?= =?utf-8?B?ZnZGbGc3TjdpVmtwL1UwNE4yaEwxZUVWQ0J1MDVkZ0tycllsZz09?= X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-Network-Message-Id: 0b6233c1-3bb4-4288-1445-08db0533587f X-MS-Exchange-CrossTenant-AuthSource: CO1PR10MB4531.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 02 Feb 2023 15:37:09.4263 (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: mOYNhbFAzBk0dx8lwpGr0rULIq0wat7QcyI9Ifm7mGq2FTGe6SSCe7cMYBsmgETF4IGR4u8V+sBvDjTh0oKuo5l9W2aFHMMZTawr60ZxyHE= X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR10MB6145 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.930,Hydra:6.0.562,FMLib:17.11.122.1 definitions=2023-02-02_10,2023-02-02_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxlogscore=999 phishscore=0 malwarescore=0 mlxscore=0 adultscore=0 suspectscore=0 spamscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2302020140 X-Proofpoint-ORIG-GUID: KSN1dAplH9L9ZIcAH77BpnORAYPQ0sMZ X-Proofpoint-GUID: KSN1dAplH9L9ZIcAH77BpnORAYPQ0sMZ X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230202_073723_402072_E01484A5 X-CRM114-Status: GOOD ( 25.48 ) X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: ldufour@linux.ibm.com, kexec@lists.infradead.org, bhe@redhat.com, hbathini@linux.ibm.com Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org On 2/1/23 00:38, Sourabh Jain wrote: > On architectures like PowerPC the crash notes are available for all > possible CPUs. So let's populate the elfcorehdr for all possible > CPUs having crash notes to avoid updating elfcorehdr during in-kernel > crash update on CPU hotplug events. > > The similar technique is used in kexec-tool for kexec_load case. > > Signed-off-by: Sourabh Jain > --- > kernel/crash_core.c | 9 ++++++--- > 1 file changed, 6 insertions(+), 3 deletions(-) > > diff --git a/kernel/crash_core.c b/kernel/crash_core.c > index 37c594858fd51..898d8d2fe2e2e 100644 > --- a/kernel/crash_core.c > +++ b/kernel/crash_core.c > @@ -364,8 +364,8 @@ int crash_prepare_elf64_headers(struct kimage *image, struct crash_mem *mem, > ehdr->e_ehsize = sizeof(Elf64_Ehdr); > ehdr->e_phentsize = sizeof(Elf64_Phdr); > > - /* Prepare one phdr of type PT_NOTE for each present CPU */ > - for_each_present_cpu(cpu) { > + /* Prepare one phdr of type PT_NOTE for possible CPU with crash note. */ > + for_each_possible_cpu(cpu) { Sourabh, Thomas Gleixner is suggesting moving away from for_each_present_cpu() to for_each_online_cpu(). Using for_each_online_cpu() is going to the minimum number of needed, whereas your approach of for_each_possible_cpu() would be to the maximum number needed. What would be the ramifications to ppc for moving towards for_each_online_cpu()? In my next patch series, I have finally figured out how to use cpuhp framework to where it is possible to use for_each_online_cpu() here, but that is at odds with your changes here. Thanks, eric > #ifdef CONFIG_CRASH_HOTPLUG > if (IS_ENABLED(CONFIG_HOTPLUG_CPU)) { > /* Skip the soon-to-be offlined cpu */ > @@ -373,8 +373,11 @@ int crash_prepare_elf64_headers(struct kimage *image, struct crash_mem *mem, > continue; > } > #endif > - phdr->p_type = PT_NOTE; > notes_addr = per_cpu_ptr_to_phys(per_cpu_ptr(crash_notes, cpu)); > + if (!notes_addr) > + continue; > + > + phdr->p_type = PT_NOTE; > phdr->p_offset = phdr->p_paddr = notes_addr; > phdr->p_filesz = phdr->p_memsz = sizeof(note_buf_t); > (ehdr->e_phnum)++; _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec