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Wed, 15 Jul 2026 00:06:40 +0000 Date: Tue, 14 Jul 2026 17:06:33 -0700 From: Alison Schofield To: John Groves CC: John Groves , Dan Williams , John Groves , Vishal Verma , Dave Jiang , Matthew Wilcox , Jan Kara , Alexander Viro , Christian Brauner , Miklos Szeredi , Ira Weiny , Jonathan Cameron , "nvdimm@lists.linux.dev" , "linux-cxl@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-fsdevel@vger.kernel.org" Subject: Re: [PATCH V6 0/10] Fixes to the previously-merged drivers/dax/fsdev series Message-ID: References: <20260615160531.17432-1-john@jagalactic.com> <0100019ecc080a68-8dc0c99f-ab17-4aa9-83d9-490e9c97ac2e-000000@email.amazonses.com> Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <0100019ecc080a68-8dc0c99f-ab17-4aa9-83d9-490e9c97ac2e-000000@email.amazonses.com> X-ClientProxiedBy: SJ0PR03CA0260.namprd03.prod.outlook.com (2603:10b6:a03:3a0::25) To DS4PPF0BAC23327.namprd11.prod.outlook.com (2603:10b6:f:fc02::9) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS4PPF0BAC23327:EE_|SA2PR11MB4796:EE_ X-MS-Office365-Filtering-Correlation-Id: 7fc0365c-7489-44be-74e8-08dee204f115 X-LD-Processed: 46c98d88-e344-4ed4-8496-4ed7712e255d,ExtAddr X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|376014|7416014|366016|23010399003|4143699003|18002099003|11063799006|56012099006|22082099003; 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It has been soaking in the famfs CI pipeline and 1) won't affect > anything that doesn't use drivers/dax/fsdev.c, and 2) doesn't affect any > known workloads -- although the bugs would have manifested when multi-range > DCD dax devices are a thing (soon-ish). > > Most of the series is confined to drivers/dax/fsdev.c. Two patches touch > shared DAX core in drivers/dax/super.c: patch 8 reads holder_ops once in > dax_holder_notify_failure() to close a double-fetch NULL dereference, and > patch 9 reorders fs_put_dax() and adds a WARN_ON(). fs_put_dax() is used by > ext2/ext4/erofs/xfs, but only holder-passing callers (like XFS in-tree) will > see a behavior change, and only a new warning if they misuse it. Series applied to libnvdimm-for-next: https://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm.git/