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Fri, 23 May 2025 14:38:23 -0700 Date: Fri, 23 May 2025 14:38:21 -0700 From: Nicolin Chen To: "Tian, Kevin" CC: "jgg@nvidia.com" , "corbet@lwn.net" , "will@kernel.org" , "bagasdotme@gmail.com" , "robin.murphy@arm.com" , "joro@8bytes.org" , "thierry.reding@gmail.com" , "vdumpa@nvidia.com" , "jonathanh@nvidia.com" , "shuah@kernel.org" , "jsnitsel@redhat.com" , "nathan@kernel.org" , "peterz@infradead.org" , "Liu, Yi L" , "mshavit@google.com" , "praan@google.com" , "zhangzekun11@huawei.com" , "iommu@lists.linux.dev" , "linux-doc@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "linux-tegra@vger.kernel.org" , "linux-kselftest@vger.kernel.org" , "patches@lists.linux.dev" , "mochs@nvidia.com" , "alok.a.tiwari@oracle.com" , "vasant.hegde@amd.com" , "dwmw2@infradead.org" , "baolu.lu@linux.intel.com" Subject: Re: [PATCH v5 09/29] iommufd: Do not unmap an owned iopt_area Message-ID: References: <3ddc8c678406772a8358a265912bb1c064f4c796.1747537752.git.nicolinc@nvidia.com> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; 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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 May 2025 21:38:40.5784 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 82c2f724-290e-4810-aa36-08dd9a422f38 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CO1PEPF000044F6.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS0PR12MB7948 On Fri, May 23, 2025 at 07:53:37AM +0000, Tian, Kevin wrote: > > From: Nicolin Chen > > Sent: Sunday, May 18, 2025 11:21 AM > > > > @@ -48,6 +48,7 @@ struct iopt_area { > > int iommu_prot; > > bool prevent_access : 1; > > unsigned int num_accesses; > > + unsigned int num_owners; > > What about 'num_locked' to directly mark out that this area > is locked hence cannot be removed? Yea. That sounds more straightforward to me. I will keep it plural "num_locks". And "is_owner" can be just "locks_area". Thanks Nicolin