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Tue, 10 Mar 2020 11:06:02 +0000 Subject: Re: ppc32 panic on boot on linux-next To: linuxppc-dev@lists.ozlabs.org References: <3702b680-a0fc-20dc-027b-518b880f9a41@c-s.fr> <875zfcked5.fsf@mpe.ellerman.id.au> From: Laurentiu Tudor Message-ID: Date: Tue, 10 Mar 2020 13:06:00 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 In-Reply-To: <875zfcked5.fsf@mpe.ellerman.id.au> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit X-ClientProxiedBy: AM0PR10CA0034.EURPRD10.PROD.OUTLOOK.COM (2603:10a6:20b:150::14) To AM6PR04MB5925.eurprd04.prod.outlook.com (2603:10a6:20b:ab::19) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from [10.171.82.13] (89.37.124.34) by AM0PR10CA0034.EURPRD10.PROD.OUTLOOK.COM (2603:10a6:20b:150::14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2793.16 via Frontend Transport; Tue, 10 Mar 2020 11:06:02 +0000 X-Originating-IP: [89.37.124.34] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-HT: Tenant X-MS-Office365-Filtering-Correlation-Id: 55ed5b73-4f53-4019-8011-08d7c4e3056b X-MS-TrafficTypeDiagnostic: AM6PR04MB4152: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:8882; X-Forefront-PRVS: 033857D0BD X-Forefront-Antispam-Report: SFV:NSPM; SFS:(10009020)(4636009)(39860400002)(376002)(396003)(346002)(136003)(366004)(199004)(189003)(2906002)(36756003)(53546011)(956004)(5660300002)(16576012)(52116002)(316002)(6486002)(44832011)(2616005)(478600001)(6916009)(966005)(8936002)(81156014)(31696002)(81166006)(26005)(66946007)(66556008)(31686004)(186003)(16526019)(86362001)(8676002)(66476007); DIR:OUT; SFP:1101; SCL:1; SRVR:AM6PR04MB4152; H:AM6PR04MB5925.eurprd04.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; A:1; MX:1; Received-SPF: None (protection.outlook.com: nxp.com does not designate permitted sender hosts) X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-MS-Exchange-AntiSpam-MessageData: z76/kW9MTkPTRCse+kcZVPoZItMXJCjrQFc83BYiNHV711q4J8TFHNhwarnWewHTecAE1GDdp6OZkVW/KpujT6C/5eHg5AayfZypbSioV9nKbeH1XgeQQDl3r1luourOG27DohS/5J6ql53Ba3EcMg== X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 55ed5b73-4f53-4019-8011-08d7c4e3056b X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 Mar 2020 11:06:02.5225 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 1+yE+eY8Kd79hSYPIaj5PTcw1UgGIht24Q2aKzRIGjmMb1fdF/AGiXwXFqVLC2I61TvQM1D+ReU2CMtr9LdUyQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM6PR04MB4152 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Hello, On 10.03.2020 06:44, Michael Ellerman wrote: > Christophe Leroy writes: >> Le 07/03/2020 à 09:42, Christophe Leroy a écrit : >>> Le 06/03/2020 à 20:05, Nick Desaulniers a écrit : >>>> As a heads up, our CI went red last night, seems like a panic from >>>> free_initmem?  Is this a known issue? >>> >>> Thanks for the heads up. >>> >>> No such issue with either 8xx or book3s/32. >>> >>> I've now been able to reproduce it with bamboo QEMU. >>> >>> Reverting 2efc7c085f05 makes it disappear. I'll investigate. >>> >> >> Ok, I found the problem. virt_to_kpte() lacks a NULL pmd check. I'll >> send a patch for that. >> >> However, if there is no PMD I guess this area is mapped through some >> kind of block mapping. Therefore it should bail out of the function through: >> >> if (v_block_mapped(address)) >> return 0; >> >> >> Can someone who knows BOOKE investigate that ? > > Not sure we have anyone left? > > cheers > With latest linux-next, PPC32 Book-E boots to prompt: https://paste.debian.net/1134272/ --- Best Regards, Laurentiu