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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?DWYNEIEiJzBaBLaEFyM5prRrkou/MuGzRGa0Peizn/2NuNQL9mGf512D2MaT?= =?us-ascii?Q?/KQPPIj2mFCS8z8g/bjzNF4QJjNiyuPvX4YoNJy8htuD/i73OrDE0LuvFmEi?= =?us-ascii?Q?2YPq3GxlLbnLuOwCUF1sCZZWUEO+jvcx7/aziD/K5IdneWm4bX2uYMn7p0+8?= =?us-ascii?Q?eI/gPODloNT5WttWiNqaTbKcJ0+jYaZwU7jNn7o94dYkPNCcP2V5HwR/zcC3?= =?us-ascii?Q?LjsWTqyv2m7s2A994yaoyRB6XXOC/TVRolcvNrsOO67QJE3ea8RvxoVYiLUm?= =?us-ascii?Q?llJkK4jUtoepwz8A1juy72KDWVfJrBgy0Ne1TcF972MBzhFJYk8++Gkj4ZsG?= =?us-ascii?Q?otUedvVkqWWW6prAd3kIBXlVP7S7OfDQybEMxe8Ll5VTsS/mYRiukHqCMCLx?= =?us-ascii?Q?x8QCLRnJOmM6Q24oD0HDAg7/36WEoEyida9+6wjkw2/e5wYI48vMCOiFWSMX?= =?us-ascii?Q?g/U66l4AXMw/MqpOMVhOAPMVUu3N5BZQvh2vj+f+8IGtxaH8/+Majhy/sns2?= =?us-ascii?Q?TE4OhdKnUzbVY8WNdApJ/HOI0B1k2cHLAqJYHs2mIGHS0CDBHOsbaLWD3cto?= =?us-ascii?Q?F6TB2b2KBpGwKuGe6MtuqRZZo0b+dGy3pjWxVHdFvmL2J2WBZtubsNvZdCtQ?= =?us-ascii?Q?dOXZYJKmam9r4BhmIM9LQmQh+k8ZqyujKXo99wXgr1gj9Y0uirBDlx5FvKH9?= =?us-ascii?Q?kfy7EU+Gb6FjsCHqEUwmJS8whQUbbCF8h7D5wqXNtSnQNI3xkKAO1RlVwpIM?= =?us-ascii?Q?I50gGVM/J5Z1X1UFc+84kB+W0HX4Tmb3tw1cU0WTmo7Y2pPF7aWHMmBSg//x?= =?us-ascii?Q?hfom6i6PFrOhWgZgiew1J/A/UPvnbrDq/lMnggkQAcXkdsjWRc5jnuIXYdmK?= =?us-ascii?Q?5f8XesMeTL3qNV4wr/PIq3cTyJoKxqnPex599G8geir5J7A5cijRJy2ZTJb4?= =?us-ascii?Q?GnDCEMUL2ZT6Y2MeSO+RwsWYdOBBc8u3LwZG5ANfbZ8W97UHR71onivjDego?= =?us-ascii?Q?qc5YmICBAyqtgTpJ83InWoe//xITmJ/AdPPkW1ml6PSI8hFKBejyJMLXP5ul?= =?us-ascii?Q?oNqDe51DrOX+vgVs6+W0TpuQ2tGZRRb3bGeJVhwiSnjmSv+Yv6CB2TXXRQl3?= =?us-ascii?Q?4VA/4iuw6x7r9wU5Qt0J8TLHrCNfDEp9VUlaTuoKUDM+/Qi+5+0X+LBSDa0G?= =?us-ascii?Q?LeBtBp4I4pbW0Txswszt53w+RqCHe1zXYOhjhOukFVisrXX9nc+mJvoCPs4S?= =?us-ascii?Q?VRoHtBQByAG1xo5yjWhoU+YMx7huISoZjbA4RRhWdHw5pWfyIxUhsg/I99Hj?= =?us-ascii?Q?EW1J+nO/3V/YaiWiYfwHlT78i5FSyTyLbrVFym4cSDm7B/XMckP/RxNinThX?= =?us-ascii?Q?sNNeEQmxi8ho9pcliJ+QwxgI/B3+FHij4o1+FVp3goNUY1J2MikqTy9vecQF?= =?us-ascii?Q?t5pQF1dqBeGJc7ImhwJfRae4YFqWuiVR7LlsUHiQQsIXiR3WCdY38IqjDnmF?= =?us-ascii?Q?QTqInQjuqNxs8HYu9rNSzgfmT1cySrMJZipIwAXgXf6ufAZ78Rb4/L0VATCZ?= =?us-ascii?Q?ouNwgFCIFBguYMzWQa0=3D?= X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: 073e8d5d-451a-458c-56c3-08d9d5566ff7 X-MS-Exchange-CrossTenant-AuthSource: BL0PR12MB5506.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Jan 2022 23:02:27.3582 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: yFJJTz3Zsl2IVTnLeJGTYn666I9efgAPSPJFJ07E/nFoM0EFuPzq49PSUrpF6fX6 X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL0PR12MB5554 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On Tue, Jan 11, 2022 at 03:57:07PM -0700, Logan Gunthorpe wrote: > > > On 2022-01-11 3:53 p.m., Jason Gunthorpe wrote: > > I just want to share the whole API that will have to exist to > > reasonably support this flexible array of intervals data structure.. > > Is that really worth it? I feel like type safety justifies replicating a > bit of iteration and allocation infrastructure. Then there's no silly > mistakes of thinking one array is one thing when it is not. If it is a 'a bit' then sure, but I suspect doing a good job here will be a lot of code here. Look at how big scatterlist is, for instance. Maybe we could have a generic 64 bit interval arry and then two type wrappers that do dma and physaddr casting? IDK. Not sure type safety of DMA vs CPU address is critical? 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I feel like type safety justifies replicating a > bit of iteration and allocation infrastructure. Then there's no silly > mistakes of thinking one array is one thing when it is not. If it is a 'a bit' then sure, but I suspect doing a good job here will be a lot of code here. Look at how big scatterlist is, for instance. Maybe we could have a generic 64 bit interval arry and then two type wrappers that do dma and physaddr casting? IDK. Not sure type safety of DMA vs CPU address is critical? Jason