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Thu, 26 Dec 2024 16:33:04 +0000 Received: from BN0PR10MB5128.namprd10.prod.outlook.com ([fe80::743a:3154:40da:cf90]) by BN0PR10MB5128.namprd10.prod.outlook.com ([fe80::743a:3154:40da:cf90%7]) with mapi id 15.20.8293.000; Thu, 26 Dec 2024 16:33:03 +0000 Message-ID: <7c76ca67-8552-4cfa-b579-75a33caa3ed2@oracle.com> Date: Thu, 26 Dec 2024 11:33:01 -0500 User-Agent: Mozilla Thunderbird Subject: Re: kernel BUG at fs/nfsd/nfs4recover.c:534 Oops: invalid opcode: 0000 To: Salvatore Bonaccorso , Jur van der Burg via Bugspray Bot Cc: anna@kernel.org, trondmy@kernel.org, jlayton@kernel.org, linux-nfs@vger.kernel.org, cel@kernel.org, 1091439@bugs.debian.org, 1091439-submitter@bugs.debian.org, 1087900@bugs.debian.org, 1087900-submitter@bugs.debian.org, Scott Mayhew References: <20241209-b219580c0-d09195e1d9e8@bugzilla.kernel.org> <20241209-b219580c2-2def6494caed@bugzilla.kernel.org> Content-Language: en-US From: Chuck Lever In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: CH5PR05CA0017.namprd05.prod.outlook.com (2603:10b6:610:1f0::7) To BN0PR10MB5128.namprd10.prod.outlook.com (2603:10b6:408:117::24) Precedence: bulk X-Mailing-List: linux-nfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN0PR10MB5128:EE_|SA2PR10MB4412:EE_ X-MS-Office365-Filtering-Correlation-Id: ebf3c0e8-d8ab-4897-ea58-08dd25caf860 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|7416014|376014|366016; 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In the mean time I >> upgraded nfs-utils from 2.5.1 to 2.8.1 which seems to fix the issue. >> Sorry for the noise, case closed. >> >> View: https://bugzilla.kernel.org/show_bug.cgi?id=219580#c2 >> You can reply to this message to join the discussion. > > Are you sure this is solved? I got hit by this today after trying to > check the report from another Debian user: > > https://bugs.debian.org/1091439 > the earlier report was > https://bugs.debian.org/1087900 > > Surprisingly I managed to hit this, after: > > Doing a fresh Debian installation with Debian unstable, rebooting > after installation. The running kernel is 6.12.6-1 (but now believe it > might be hit in any sufficient earlier version): > > Notably, in kernel-log I see as well > > [ 50.295209] RPC: Registered tcp NFSv4.1 backchannel transport module. > [ 52.158301] NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory > [ 52.158333] NFSD: Using legacy client tracking operations. Hi Salvatore, If you no longer provision nfsdcltrack in user space, then you want to set CONFIG_NFSD_LEGACY_CLIENT_TRACKING to 'N' in your kernel config. Otherwise, Scott Mayhew is the area expert (cc'd). > [ 52.158337] NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory > > Normally it should have been (if using the more modern client racking > operations): > > > [ 145.851951] RPC: Registered tcp NFSv4.1 backchannel transport module. > [ 146.891838] NFSD: Using nfsdcld client tracking operations. > [ 146.891844] NFSD: no clients to reclaim, skipping NFSv4 grace period (net f0000000) > > I can reproduce it if I do in following order: > > Install Debian unstable, reboot after installation. > > Install nfs-kernel-server package with its dependencies. > > In our case this is nfs-utils upstream already at 2.8.2. > > I notice the following observation: When installing under this > condition the package freshly there is not yet a valid: > > /var/lib/nfs/nfsdcld/main.sqlite > > for the nfsdcld, and so it used the legacy client tracking. > > At this point we get the splat. if before installing the packages I > initialize /var/lib/nfs/nfsdcld/main.sqlite: > > mkdir -p /var/lib/nfs/nfsdcld > chmod -c 0700 /var/lib/nfs/nfsdcld/ > > and > > sqlite3 /var/lib/nfs/nfsdcld/main.sqlite < CREATE TABLE parameters (key TEXT PRIMARY KEY, value TEXT); > CREATE TABLE grace (current INTEGER , recovery INTEGER); > INSERT OR FAIL INTO grace values (1, 0); > INSERT OR FAIL INTO parameters values ("version", "4"); > INSERT OR FAIL INTO parameters values ("first_time", "1"); > SQL > > So to me it looks that the problem arises from actually starting the > services were we have to fallback to the legacy method as we cannot > use yet nfsdcld. > > One other observation: if while installing the package the nfsdcltrack > utility is available and the these NFS client tracking methods are > availabe, it seems that the issue is not hit, and dmesg shows > > [ 216.206678] RPC: Registered tcp NFSv4.1 backchannel transport module. > [ 218.215961] NFSD: Using UMH upcall client tracking operations. > [ 218.218074] NFSD: Using UMH upcall client tracking operations. > [ 218.218078] NFSD: starting 90-second grace period (net f0000000) > > In the most recent nfs-utils packages we do actually not install > nfsdcltrack anymore as as I understand it's encouraged to move away > form it as nfsdcld is available. > > Regards, > Salvatore -- Chuck Lever