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Mon, 28 Oct 2024 17:38:06 +0000 Message-ID: <181cdcf6-2cc2-4f71-92e1-8ac2ab3fbfb0@talpey.com> Date: Mon, 28 Oct 2024 13:38:03 -0400 User-Agent: Mozilla Thunderbird Subject: Re: nfsd stuck in D (disk sleep) state To: =?UTF-8?Q?Beno=C3=AEt_Gschwind?= , Chuck Lever III Cc: Linux NFS Mailing List References: <1cbdfe5e604d1e39a12bc5cca098684500f6a509.camel@minesparis.psl.eu> <4A9BFCA9-7A15-4CA7-B198-0A15C3A24D11@oracle.com> <509abdda-9143-40da-bbf2-9bfdf8044d4c@talpey.com> Content-Language: en-US From: Tom Talpey In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-ClientProxiedBy: BN9PR03CA0577.namprd03.prod.outlook.com (2603:10b6:408:10d::12) To SN6PR01MB5246.prod.exchangelabs.com (2603:10b6:805:d8::14) 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: SN6PR01MB5246:EE_|DM8PR01MB7127:EE_ X-MS-Office365-Filtering-Correlation-Id: effa401b-ad42-48c8-5fc3-08dcf7774808 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|376014|366016; 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Moreover none of the clients were > rebooting, starting or shutting down. Interesting. I would therefore suspect the create_session was simply a reconnect after some kind of transport connection error/loss, and the destroy_session callers are hung for the same reason. And I agree with Chuck that a network trace will help identify the patch which is needed here. You may have to let the trace run for a minute or two to detect all the retry traffic between the client and server threads. Tom.