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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?s98D3PpkSnjn02NI/McEIMBseYqcPLaxfGRKIZIfgtZbd8URuPCI4YCpwERs?= =?us-ascii?Q?mCOPRNJaKzjqOQcBxbUxY+vdd3PB/8FxNvEk9BuJHx7vRCYqUHzKJZEQzFZI?= =?us-ascii?Q?oqsH5r0fTwem4jp2Q/rouwY559veRNhNDXo3rX+IfYkp7j+ktzsGXqPuhY+E?= =?us-ascii?Q?CCwsnar0LiH+O43Wzu2F2twVcGJ9aKK4IDuAENmxo/jiN0QJR19buj3onQe8?= =?us-ascii?Q?+WEQmSgNvfFyu3bkhghi5hXixhunwSfF5mUcHIcR+53q2Lb0rkvYMToFiq5R?= =?us-ascii?Q?QuRhL8+UD3XDGX7VbNefvjtBvR1i52+QjdVwt53yq2YXtXTM3cNBDdBDyHOw?= =?us-ascii?Q?M0Si4XRWGCulewQvbHiLB3DINgI9UugdxlVo7QQKSD0Ohf6rGhiTKPrsQdy+?= =?us-ascii?Q?BsgZNgVtk5U5f29wTrjIti6wb+hd7b5FpJI+hyIt78tAO4zRDP+6Lh6tEuoy?= =?us-ascii?Q?2ghU1S0ebLg9dQPn5Y+tv9O9u0MctZGGOUcAMEWRESi6N5by8PmziPkyla2E?= =?us-ascii?Q?zFY9Hy92y3dNd0ehpiHcQETkO2pbPP7ZtRcq1FX1Fv2QDlLnzReT4ejtiL9L?= =?us-ascii?Q?SKIPZkLpX/BO/eI6ZQQb51IcMve0CdWCvVAeKSy09sv7mowBonOZHpi8cXfe?= =?us-ascii?Q?q8e83N2hq0d3v57E432ON3i7coL4ghVKCHyX/u1D/o1PK8E4rwwg91/NZg4M?= =?us-ascii?Q?Y1u4INb2eSkUYrCM0gKsb1Tsa7CC8oVAqoN890gGcn4+IRNcpk6fd9HUU/TU?= =?us-ascii?Q?FZaiBTcL/sltvkxpkgL2ayepa9FADKoOW4gbXKoA7nrEK35d4v8W+dT0lzt0?= =?us-ascii?Q?+AviIzPS8mW02S9Q4m1n2+fEr9w0WvSktubjE+zZ7QliNBsf24Hb1naGLWGO?= =?us-ascii?Q?71NlWuMJHbkQEsv9cerGt1gJ69hQ/aEzzKIhHzue0EnwLBiYTPOBDoq6SU8Y?= =?us-ascii?Q?2uwOsSqW+Y/dVPBFVKu5VN1WIiqLtK/mz1EsNHmpqavWLGgRHGdgupomVPTH?= =?us-ascii?Q?cmc8Ww5c/RWjZ3fvYnMxkIPveaLIdb+HLIwkoreJtIQocPdxSrh0fLjECETG?= =?us-ascii?Q?t41xRHvKMD6BMne9Gx6TTPXRdf3paeTf5SDsAzZ+tYK7mH7sEPBdGYYwM5SV?= =?us-ascii?Q?J8Aepj8wfVQXU9hRdde3Rym1QRNm/VT0G2SbrNZkcEz6Meg+K0P/Oy2BpQ3C?= =?us-ascii?Q?Aw1bxrx0+ZXV2HpwoBmLHdEOW0MyikWj74ybSkxHlnGcP5t96x9ZmcGHgWMc?= =?us-ascii?Q?aA+txVcUOCu6rBiE1Vc6dnFUgVvubgcqUhCnqfTm774p7iW+B+yG1F0r8dBZ?= =?us-ascii?Q?6lUD4rkTMUVbKb440d6ieRJJqYSJE7zxrOClLL2Qk4PQnI9/sJXXxPaeMNpM?= =?us-ascii?Q?lLSnlr6OD8UL8DX0PaGzCo0TaC8yaxr1IQg4n0WwiR4dNUOIRQZ+2wHkLFG1?= =?us-ascii?Q?YjUZpDU1Z/3F7xFNGfp1KumCesHcAFALSnBAw7GVOHeUqB/VtVfOT6ZDsJZn?= =?us-ascii?Q?KPicEkJf7dQT7iMLCC4d6QhZji+CzKURLRveG2c/m478z44fX4yfUZgube3I?= =?us-ascii?Q?n4Sh/h4boLxUt1e3PqEtvIUSlU6TubBFoUfzo9//hf1rZC2MNlwVdb25bKpf?= =?us-ascii?Q?a+cUIirmu4EZOWQyiUGfVxx9vQ24Q9DUXwafiRMtMUhwe9cnwnitgLFWh2pU?= =?us-ascii?Q?ZGCy08sXQ5C2YoRBrf+mbo28xXUHOfYwlZYcP1jJor26h1BvNC1jqtYX6+oy?= =?us-ascii?Q?2F9+1iMUN/NK9Z0HXb8Vhce23ktXzNk=3D?= X-MS-Exchange-CrossTenant-Network-Message-Id: e50dfa3d-6bca-4ef9-05a2-08da54d20fdc X-MS-Exchange-CrossTenant-AuthSource: MWHPR1101MB2126.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Jun 2022 04:37:21.3539 (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: OhGRbkNHoV+t4uKWujSTz2C4hxfEq3K+piUGqa4NZKDe95EMQFOKLkOdbBGCMMeBNmkalX4pMSdbx4OqM6jFsAkuV9tmpvRFTfKT1nZRJpo= X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA2PR11MB4938 X-OriginatorOrg: intel.com Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org Dave Chinner wrote: > On Tue, Jun 21, 2022 at 04:48:06PM -0700, Dan Williams wrote: > > Dave Chinner wrote: [..] > > One experiment I want to see is turn off DAX and see what the unmount > > performance is when this is targeting page cache for mmap I/O. My > > suspicion is that at some point dirty-page pressure triggers writeback > > that just does not happen in the DAX case. > > I'd be more interesting in the result of a full bisect to find > the actual commit that caused/fixed the behaviour you are seeing. Ok, the one-shot-in-the-dark revert guess indeed runs the risk of something else in that build modulating the failure. Sravani, lets attempt the full bisect for this to add more confidence.