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charset="us-ascii" Content-ID: Content-Transfer-Encoding: quoted-printable Precedence: bulk X-Mailing-List: rcu@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-Exchange-AntiSpam-ExternalHop-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-ExternalHop-MessageData-0: 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 X-OriginatorOrg: wdc.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: SN7PR04MB8532.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: fd3a01ce-c901-438d-57bc-08de5d44c2dd X-MS-Exchange-CrossTenant-originalarrivaltime: 27 Jan 2026 01:38:24.1416 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: b61c8803-16f3-4c35-9b17-6f65f441df86 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: ms2AnA+Qv5xnbeCI0xwzqKGF/pOAr6Dm23CxCSJmpoQzDBG/ok91ALNxjx973ovHh0kBZwYvjPc1WObDEzh+C4EVmVLa/5li7C+R9aP7j3c= X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL3PR04MB8010 On Jan 27, 2026 / 10:05, Dave Chinner wrote: [...] > IOWs, this looks like some kind of RCU/static key/scheduler > interaction which may propagate into the block layer if it needs RCU > synchronisation. Hence it does not appear to have anything to do > with the filesystem layers, and it is possible the block layer is > colateral damage, too. >=20 > Probably best to hand this over to the core kernel ppl. Dave, thank you very much for looking in the logs and sharing your views. I will wait for comments from RCU experts and keep the effort to recreate the hangs.=