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X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA0PR11MB4559 X-OriginatorOrg: intel.com Hello, kernel test robot noticed "kunit.damon-operations.damon_test_split_evenly.fail" on: commit: fe301d6b4b4aec003ff84aa4d2860e772b147225 ("[PATCH] mm/damon: make region calculations more precise") url: https://github.com/intel-lab-lkp/linux/commits/Enze-Li/mm-damon-make-region-calculations-more-precise/20250521-151059 patch link: https://lore.kernel.org/all/20250521070747.1458270-1-lienze@kylinos.cn/ patch subject: [PATCH] mm/damon: make region calculations more precise in testcase: kunit version: with following parameters: group: group-03 config: x86_64-rhel-9.4-kunit compiler: gcc-12 test machine: 8 threads 1 sockets Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz (Haswell) with 16G memory (please refer to attached dmesg/kmsg for entire log/backtrace) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-lkp/202505291314.d61b1bcb-lkp@intel.com [ 109.399987] KTAP version 1 [ 109.403771] # Subtest: damon-operations [ 109.408675] # module: vaddr [ 109.408682] 1..6 [ 109.416216] ok 1 damon_test_three_regions_in_vmas [ 109.416463] ok 2 damon_test_apply_three_regions1 [ 109.422542] ok 3 damon_test_apply_three_regions2 [ 109.428508] ok 4 damon_test_apply_three_regions3 [ 109.434509] ok 5 damon_test_apply_three_regions4 [ 109.440399] # damon_test_split_evenly: EXPECTATION FAILED at mm/damon/tests/vaddr-kunit.h:290 Expected r->ar.end == start + i * expected_width, but r->ar.end == 16 (0x10) start + i * expected_width == 15 (0xf) [ 109.446223] # damon_test_split_evenly: EXPECTATION FAILED at mm/damon/tests/vaddr-kunit.h:288 Expected r->ar.start == start + i++ * expected_width, but r->ar.start == 16 (0x10) start + i++ * expected_width == 15 (0xf) [ 109.473938] # damon_test_split_evenly: EXPECTATION FAILED at mm/damon/tests/vaddr-kunit.h:290 Expected r->ar.end == start + i * expected_width, but r->ar.end == 27 (0x1b) start + i * expected_width == 25 (0x19) [ 109.502332] # damon_test_split_evenly: EXPECTATION FAILED at mm/damon/tests/vaddr-kunit.h:288 Expected r->ar.start == start + i++ * expected_width, but r->ar.start == 27 (0x1b) start + i++ * expected_width == 25 (0x19) [ 109.530150] # damon_test_split_evenly: EXPECTATION FAILED at mm/damon/tests/vaddr-kunit.h:290 Expected r->ar.end == start + i * expected_width, but r->ar.end == 38 (0x26) start + i * expected_width == 35 (0x23) [ 109.558624] # damon_test_split_evenly: EXPECTATION FAILED at mm/damon/tests/vaddr-kunit.h:288 Expected r->ar.start == start + i++ * expected_width, but r->ar.start == 38 (0x26) start + i++ * expected_width == 35 (0x23) [ 109.586405] # damon_test_split_evenly: EXPECTATION FAILED at mm/damon/tests/vaddr-kunit.h:290 Expected r->ar.end == start + i * expected_width, but r->ar.end == 49 (0x31) start + i * expected_width == 45 (0x2d) [ 109.614882] # damon_test_split_evenly: EXPECTATION FAILED at mm/damon/tests/vaddr-kunit.h:283 Expected r->ar.start == start + i * expected_width, but r->ar.start == 49 (0x31) start + i * expected_width == 45 (0x2d) [ 109.642682] # damon_test_split_evenly: EXPECTATION FAILED at mm/damon/tests/vaddr-kunit.h:290 Expected r->ar.end == start + i * expected_width, but r->ar.end == 2 (0x2) start + i * expected_width == 1 (0x1) [ 109.670817] # damon_test_split_evenly: EXPECTATION FAILED at mm/damon/tests/vaddr-kunit.h:283 Expected r->ar.start == start + i * expected_width, but r->ar.start == 2 (0x2) start + i * expected_width == 1 (0x1) [ 109.698255] # damon_test_split_evenly: EXPECTATION FAILED at mm/damon/tests/vaddr-kunit.h:256 Expected damon_va_evenly_split_region(t, r, nr_pieces) == -22, but damon_va_evenly_split_region(t, r, nr_pieces) == 0 (0x0) [ 109.751585] # damon_test_split_evenly: EXPECTATION FAILED at mm/damon/tests/vaddr-kunit.h:258 Expected damon_nr_regions(t) == 1u, but damon_nr_regions(t) == 2 (0x2) 1u == 1 (0x1) [ 109.751634] # damon_test_split_evenly: EXPECTATION FAILED at mm/damon/tests/vaddr-kunit.h:261 Expected r->ar.start == start, but r->ar.start == 6 (0x6) start == 5 (0x5) [ 109.776758] not ok 6 damon_test_split_evenly [ 109.800835] # damon-operations: pass:5 fail:1 skip:0 total:6 [ 109.806182] # Totals: pass:5 fail:1 skip:0 total:6 [ 109.812563] not ok 4 damon-operations The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20250529/202505291314.d61b1bcb-lkp@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki