[viro-vfs:work.debugfs] [vmscan] 1c90302a35: kernel-selftests.kvm.access_tracking_perf_test.fail

[kernel test robot <oliver.sang@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 <oliver.sang@intel.com>
| 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