Greeting, FYI, we noticed the following commit (built with gcc-9): commit: 8edd7f41336b4462f69b011deb7cf37a2c3f8516 ("[PATCH v11 03/15] tools/libperf: avoid counting of nonfilterable fdarray fds") url: https://github.com/0day-ci/linux/commits/Alexey-Budankov/perf-support-enable-and-disable-commands-in-stat-and-record-modes/20200714-171347 base: https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git c085fb8774671e83f6199a8e838fbc0e57094029 in testcase: perf-sanity-tests with following parameters: perf_compiler: gcc ucode: 0x28 on test machine: 8 threads Intel(R) Core(TM) i7-4790 v3 @ 3.60GHz with 6G memory caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): If you fix the issue, kindly add following tag Reported-by: kernel test robot 2020-07-15 06:37:59 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 36 36: Filter fds with revents mask in a fdarray : FAILED! 2020-07-15 06:37:59 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 37 37: Add fd to a fdarray, making it autogrow : Ok 2020-07-15 06:37:59 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 38 38: kmod_path__parse : Ok 2020-07-15 06:37:59 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 39 39: Thread map : Ok 2020-07-15 06:37:59 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 41 41: Session topology : Ok 2020-07-15 06:37:59 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 43 43: Synthesize thread map : Ok 2020-07-15 06:37:59 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 44 44: Remove thread map : Ok 2020-07-15 06:37:59 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 45 45: Synthesize cpu map : Ok 2020-07-15 06:37:59 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 46 46: Synthesize stat config : Ok 2020-07-15 06:37:59 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 47 47: Synthesize stat : Ok 2020-07-15 06:37:59 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 48 48: Synthesize stat round : Ok 2020-07-15 06:37:59 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 49 49: Synthesize attr update : Ok 2020-07-15 06:37:59 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 50 50: Event times : Ok 2020-07-15 06:37:59 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 51 51: Read backward ring buffer : Ok 2020-07-15 06:37:59 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 52 52: Print cpu map : Ok 2020-07-15 06:37:59 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 53 53: Merge cpu map : Ok 2020-07-15 06:37:59 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 54 54: Probe SDT events : Ok 2020-07-15 06:37:59 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 55 55: is_printable_array : Ok 2020-07-15 06:37:59 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 56 56: Print bitmap : Ok 2020-07-15 06:37:59 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 57 57: perf hooks : Ok 2020-07-15 06:37:59 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 59 59: unit_number__scnprintf : Ok 2020-07-15 06:37:59 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 60 60: mem2node : Ok 2020-07-15 06:37:59 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 61 61: time utils : Ok 2020-07-15 06:37:59 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 62 62: Test jit_write_elf : Ok 2020-07-15 06:37:59 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 63 63: Test libpfm4 support : Skip (not compiled in) 2020-07-15 06:37:59 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 64 64: Test api io : Ok 2020-07-15 06:37:59 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 65 65: maps__merge_in : Ok 2020-07-15 06:37:59 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 66 66: Demangle Java : Ok 2020-07-15 06:37:59 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 67 67: x86 rdpmc : Ok 2020-07-15 06:37:59 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 68 68: Convert perf time to TSC : Ok 2020-07-15 06:37:59 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 69 69: DWARF unwind : Ok 2020-07-15 06:38:00 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 70 70: x86 instruction decoder - new instructions : Ok 2020-07-15 06:38:00 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 71 71: Intel PT packet decoder : Ok 2020-07-15 06:38:00 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 72 72: x86 bp modify : Ok 2020-07-15 06:38:00 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 73 73: probe libc's inet_pton & backtrace it with ping : Ok 2020-07-15 06:38:01 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-8edd7f41336b4462f69b011deb7cf37a2c3f8516/tools/perf/perf test 75 75: Zstd perf.data compression/decompression : Ok To reproduce: git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp install job.yaml # job file is attached in this email bin/lkp run job.yaml Thanks, Rong Chen