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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?znLInJax64c+UVSNcqVXSxawKEOkBHMh7E4pe5oD/q4Q3ApfQ825nTMus5nS?= =?us-ascii?Q?oWRKU4yR1Zf+qTJU5AaT7GRQkwf2vRnX1bneXLv7dihJsrBpZoSp9SktTkGd?= =?us-ascii?Q?wY227e8F5J5m37BzwXTGFn56ULu1BANQ/nFG8U+PH6USCsHczTDcBGO0j3BW?= =?us-ascii?Q?C981OYTO55w03IQMMFYNyFghNTDzV5utmmdRLrJcTmZOQ8+ASRAJ64einGit?= =?us-ascii?Q?7mdfRp5ivzxBH+WMQCvFEfa3gpei2jkoikg1mdnOxPmqiO4ELnmFFEmO+HIM?= =?us-ascii?Q?oM0g2e8zcf3Ps5RQx8pD0M98TAfPZ7+dAyHe74Ahdkv3a0JPZvdKQ0NxHu/d?= =?us-ascii?Q?hnl8sviI0vo9zNcjjdBLp6ywTn1f1rM/w/eFCZSGuPgtUdl8NrMOGxSRiTAa?= =?us-ascii?Q?GBr36wFVLTZnOFW6zSvd2idQkFbB4n0RGfWby5Yx0zsZEqySQ6fzzffhZr5Y?= =?us-ascii?Q?9OMdbBYbrIDbru+ympfYhRetX1Fr2oIljHNXJjds37AA8afiOxdU3YJB3fiG?= =?us-ascii?Q?zinE25Umhmu2eKWXoB6MBZGLSzYhWFvYsn35TKvRDiy94s64VqwM+VB9M/QV?= =?us-ascii?Q?KRc2vJEmVR4WsL3FtmZvFIpVl6JwIs8h6/Q2Npp0kfvHQFcbp1s4OA0ENTs0?= =?us-ascii?Q?AXp5IGuXEHP7vI/ZgmcYelQAmaH1NcXO0/W7eyOAM3OwM0JestvkvV6CND9U?= =?us-ascii?Q?zCW8vM4orW/E/ZDjgWyqcyFnZ+OLUSBz/vc2J0SceIvpYxLoGp5TnwHtYupE?= =?us-ascii?Q?OctILurRybJ890gjgdJhNJPhn84GQrLmMNYhSxXtIzYe90b8Mc8hqF/BWum1?= =?us-ascii?Q?HeCYKJtQ92Uk0kzh/qwcZNGfsaf9GOBqrL2aDm/w1/lA5SUCPYYUZkUO2QK8?= =?us-ascii?Q?UJ9J9MCExe9/SnvdXo0iszI0vblvf6pIsPVddb74e328OTLira/Bo8ExPFDD?= =?us-ascii?Q?ZTgNsq+yW9V0EDOzRS4gP4pn8cybG6I6Rzt4P/PxxKV7r9BE5dP9VU+bG42D?= =?us-ascii?Q?1Y0u7qvytD6L8n1As6lkFSxHJYzGrQDbIZiW71JTFRy/DRaeNW20yxwlj095?= =?us-ascii?Q?aErbFJrJgMRwmKMNgKXIRBKZ0heQwhW5bs/enUAA1vgLNnzYuvoSi8owc6/m?= =?us-ascii?Q?i9AJ8r2Pd50IoeM2fPJ8wNVd861snNjnXVzkSOAuksCag8VtALAzEB9gQ2HF?= =?us-ascii?Q?gDj5xxm3ef04O0JsVco4GKs+2hEUSfKXuaq16LlYuNYTvLncZnUdI5cSuAeq?= =?us-ascii?Q?dLD0bKzTDqpK4Pj3LUH4jyM36nanOYCIhwaHGLkZN2DEpNerdvNX+56iu8T+?= =?us-ascii?Q?MYmeWmNB0r+OGtOIJhqK334Fee0QtCxkh5215x1n0aNBQPmv0a8SXl98bmAD?= =?us-ascii?Q?kGI747oN0r/niB2a7taj3S5Ax/G5dqcO449Zzlr5bvASQUCVv/ud0Pie0qDH?= =?us-ascii?Q?W01Ox33ShjHRVPqvnYEihER4JOEC9ATuJepjHxnJvcLhGu9I73CuuutDs+qX?= =?us-ascii?Q?eUAhviYglBglKcQd4i18Nhd1kOG7c4laCguF+4LnvHCjnL/5/aek82c2uJFi?= =?us-ascii?Q?vTB39EDQnXwSdPBDBPjlYTFrBuD2sJrUzG6vIH/7?= X-MS-Exchange-CrossTenant-Network-Message-Id: 66c5c484-e6bd-44e2-1a24-08db2c1d0b68 X-MS-Exchange-CrossTenant-AuthSource: MN0PR11MB6206.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 Mar 2023 04:05:46.1509 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: B0YJDfGwQCNd01/8TKDf3qlD4tdZS+qN3QvXeEjPohHy7ZJIFLxA26ywB0+M3WcxRQcwhZeQEV99Dq5vX8ILKA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR11MB7918 X-OriginatorOrg: intel.com Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2023-03-17 at 17:08:10 +0100, Vincent Guittot wrote: > Commit 829c1651e9c4 ("sched/fair: sanitize vruntime of entity being placed") > fixes an overflowing bug, but ignore a case that se->exec_start is reset > after a migration. > > For fixing this case, we delay the reset of se->exec_start after > placing the entity which se->exec_start to detect long sleeping task. > > In order to take into account a possible divergence between the clock_task > of 2 rqs, we increase the threshold to around 104 days. > > > Fixes: 829c1651e9c4 ("sched/fair: sanitize vruntime of entity being placed") > Signed-off-by: Zhang Qiao > Signed-off-by: Vincent Guittot > This patch has been confirmed by 0day to restore the performance which was decreased by 829c1651e9c4[1], thanks for the fix. commit: a2e90611b9f425ad 829c1651e9c4a6f78398d3e6765 a53ce18cacb477dd0513c607f18 hackbench throughput: 173811 -18.4% 141887 +1.4% 176324 [1] https://lore.kernel.org/lkml/202303091155.672f546a-yujie.liu@intel.com/ thanks, Chenyu