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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?MDVvUmN2V1FQUithdElRcTVIRlNrNm1mZUExVmQ4ZCs4QWN5OWlod3Q5V0Er?= =?utf-8?B?dUQrM3p5dm10M2RWQ0pETFJnWVplMmwwTnhjQVAxZjZOL1lPOWRuS0ZhYU83?= =?utf-8?B?eC94UnZFcmVvT3Z6TTRMTEpobk9lT1FtL0pUNWpCQktEbUM2NE5RSWh4UlRr?= =?utf-8?B?WG50ZkJCUEVWdXBmV3RzT3F1eU5kM2xVSEdyS1lHQTRzd3lIWCtDbjYweFVL?= =?utf-8?B?M2JrbmVZckhFaDFWTnpzcWtPQ21KNUZPNnJCUkltSmJSQi9teHNFRnBka1hn?= =?utf-8?B?T2I2VC8vZ2JocTZibzliZWNmZUlKT21MdWJvckF1aE9DOXJ6QktRcE94Qzly?= =?utf-8?B?RkJQdVdSZmlRRDZPSUhqUEVkeGQvMm9NU0trNDVSN1lmZndyU1dESHBlUmVp?= =?utf-8?B?M0VRTUhXOUFoT1pBUi8yL0lLTldUSkZaQWp2RTFaTlIvMWhGa2hYRkVIelA3?= =?utf-8?B?cmVtc2hzQzFBNzU5RUl3ZlByc1AzQmpXTjBPeFRtbzZwb1lhOVJWendyQnVq?= =?utf-8?B?VXpwWmVxWDBJaVdiU2h0Q2hOc211MWFBdjJoWkl4c2xvRnlpZXdDUW9pN1F5?= =?utf-8?B?S2JpcUViUzRPcTlmNy9MMGJOQXhKWkR3VC9aRjJvWGNNT0JuM2RZWWRFY2ZT?= =?utf-8?B?YnUxVHp6TUhjbGZUS1pITGlMcXk4Wk1Rc0RxWnVwNDJMV2VMMmRTVk9Fa2J2?= =?utf-8?B?MXJMNkxJNHlRQXB0QjIxUWVSeEIzY1FUMkFuYWVXUDRFeG10SUpRVkZqTXRj?= =?utf-8?B?NmU2QTB2M3c4N0RPdi84OUNRU3A5eUpieFhuL3pCa2wyYlNQcDFJK2xsN1la?= =?utf-8?B?MngvVUY5OVRtcWhwV3pRSUVhQUZPNDhaWlpCaDl2SklacEhBMjZUY3V4WlJP?= =?utf-8?B?a25rdTJSUU1qdEdOclE0SGFWdHk5QXFvU0cyTW5nWjhtN29rWmdJYmlrZ1pE?= =?utf-8?B?bGNaWmMrdjEwcWxvN0dETmpRUk93MXV2MzlMNDVnR3lCelRzcWFZRnNxbmNC?= =?utf-8?B?ZWJZRHhydGlZWHJhV3JUSi9yZlVXcmRnYkd6TzhtdHJ2NUFNT1pabVJLUWZK?= =?utf-8?B?c3JOaTNsUTZwNVZmdTBrNG1IUGlFR093QnZOMzRpSC9Fd24yK3FUR0ZhNUxJ?= =?utf-8?B?Sko0WXpFTTVuWHZHV2w2SGg4VmFlWmFaNE5jS2hLRGhKczRwVGlDZlRHMGRq?= =?utf-8?B?OUkyYmhVUUxTRjAzVkljL0tFdGFxOFYrQStRS3kyU2Z4SDRiSzE2YnY1SW8r?= =?utf-8?B?RkdCNm5OT0tBZjVLenBTMkVGek1rc2c2QlBCSGVFNno4a1dHZ1BUdmlGbnQ4?= =?utf-8?B?WDI0L1hBSHBZWGZUTUt3bWszSWQ4SEllZW1ka1kwQ2w1UkgyRmsrU1FIeU9o?= =?utf-8?B?N3A4OTQzM29OcnZ4NUtnNW56NXh4T2RRa1Q2RFYwMWpRUHBnUGwvRnVZU1lu?= =?utf-8?B?cm9GR2xHWnNPbzMvYTlnUnNjTUkwSGRIcVFaMVIvMUwxNHhJeCt2ZUN2Qy9h?= =?utf-8?B?SHJkemxnN1lqZXNmZ0ZBQjZpKytNZklBR1dXeVNOSGJUTmJoSEhFZXFYbHpF?= =?utf-8?B?RjZvY0JYRTRGeUo4UkxoT1JEamkzcWlVQWhaNkt4K1N1VGsxNUpORnJGdkNK?= =?utf-8?B?MWM3T3R3b0tubWNRaDlhWHh0YmZMYmtadkQ1S3RaUnB0dHp6NWQzZlV1ZVNn?= =?utf-8?B?TlZTNlp4cEU4bEFGWnBBWnVjdCtCUTlWL0FYQnVkak8zNnQ3aktWcUsxaU9i?= =?utf-8?B?RjIvbUVZTmRzaUJOcjlmL2JRNm9WZ01NWkJueWJ5OGErRDcvU3I1YUU4OHRP?= =?utf-8?B?K0JoUW8rb2QybXo1ZG96MEhiR1ltcVIzSzZrS0ZQWUd0dVJrL1FGQkRnUURy?= =?utf-8?Q?0rKI39UTTIH4+?= X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: 93229e0a-f1c3-4f8a-1d9c-08d98746d5ed X-MS-Exchange-CrossTenant-AuthSource: MWHPR1201MB0192.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 04 Oct 2021 14:54:15.9771 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: ZqSOru+Lpa7/li8gz64YdbiYsmZC1fN1JFtvOvogPKWG7BusoiTqVgvnSwxc7b+6 X-MS-Exchange-Transport-CrossTenantHeadersStamped: MWHPR12MB1214 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Am 04.10.21 um 15:27 schrieb Jason Gunthorpe: > On Mon, Oct 04, 2021 at 03:22:22PM +0200, Christian König wrote: > >> That use case is completely unrelated to GUP and when this doesn't work we >> have quite a problem. > My read is that unmap_mapping_range() guarentees the physical TLB > hardware is serialized across all CPUs upon return. Thanks, that's what I wanted to make sure. Christian. > > It also guarentees GUP slow is serialized due to the page table > spinlocks. > > Jason