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X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR11MB7277 X-OriginatorOrg: intel.com Hello, kernel test robot noticed "kernel-selftests.kvm.access_tracking_perf_test.fail" on: commit: 1c90302a35bd038c176ce0bf731221b28369bb36 ("vmscan: don't bother with debugfs_real_fops()") https://git.kernel.org/cgit/linux/kernel/git/viro/vfs.git work.debugfs in testcase: kernel-selftests version: kernel-selftests-x86_64-7ff71e6d9239-1_20250215 with following parameters: group: kvm config: x86_64-rhel-9.4-kselftests compiler: gcc-12 test machine: 224 threads 2 sockets Intel(R) Xeon(R) Platinum 8480+ (Sapphire Rapids) with 256G 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/202506201427.7fc6ab94-lkp@intel.com The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20250620/202506201427.7fc6ab94-lkp@intel.com # timeout set to 120 # selftests: kvm: access_tracking_perf_test # Random seed: 0x6b8b4567 # Skipping idle page count sanity check, because NUMA balancing is enabled # Using lru_gen for aging # Creating cgroup: /sys/fs/cgroup/access_tracking_perf_test # Testing guest mode: PA-bits:ANY, VA-bits:48, 4K pages # guest physical test memory: [0xfffffbffff000, 0xffffffffff000) # # Populating memory : 1.643991832s # Initial aging pass (lru_gen) # ==== Test Assertion Failure ==== # lib/lru_gen_util.c:166: *end == '\0' # pid=11817 tid=11817 errno=0 - Success # 1 0x0000000000408dd8: memcg_stats_handle_in_node at lru_gen_util.c:166 # 2 0x0000000000409034: lru_gen_read_memcg_stats at lru_gen_util.c:221 # 3 0x00000000004091e0: lru_gen_do_aging at lru_gen_util.c:309 # 4 0x0000000000403526: run_test at access_tracking_perf_test.c:436 # 5 0x0000000000403d8c: for_each_guest_mode at guest_modes.c:96 # 6 0x0000000000402bfd: run_test_for_each_guest_mode at access_tracking_perf_test.c:486 # 7 0x000000000041d993: cg_run at cgroup_util.c:382 # 8 0x0000000000402869: main at access_tracking_perf_test.c:591 # 9 0x00007f381a5a2249: ?? ??:0 # 10 0x00007f381a5a2304: ?? ??:0 # 11 0x0000000000402990: _start at ??:? # malformed generation age '0r' not ok 76 selftests: kvm: access_tracking_perf_test # exit=254 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki