Greeting, FYI, we noticed the following commit (built with gcc-9): commit: 52335f0d68798290c6b469c2c095aedd084d6a04 ("PageAnonExclusive") git://github.com/davidhildenbrand/linux cow_fixes_part_2a in testcase: ltp version: ltp-x86_64-14c1f76-1_20220129 with following parameters: disk: 1HDD fs: xfs test: syscalls-05 ucode: 0xec test-description: The LTP testsuite contains a collection of tools for testing the Linux kernel and related features. test-url: http://linux-test-project.github.io/ on test machine: 4 threads Intel(R) Core(TM) i5-6500 CPU @ 3.20GHz with 32G 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 <oliver.sang(a)intel.com&gt; <<<test_start>>> tag=madvise07 stime=1645700830 cmdline="madvise07" contacts="" analysis=exit <<<test_output>>> tst_test.c:1433: TINFO: Timeout per run is 0h 25m 00s madvise07.c:45: TINFO: mmap(0, 4096, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0) madvise07.c:54: TINFO: madvise(0x7f87c1430000, 4096, MADV_HWPOISON) madvise07.c:60: TFAIL: Could not poison memory: EBUSY (16) Summary: passed 0 failed 1 broken 0 skipped 0 warnings 0 <<<execution_status>>> To reproduce: git clone https://github.com/intel/lkp-tests.git cd lkp-tests sudo bin/lkp install job.yaml # job file is attached in this email bin/lkp split-job --compatible job.yaml # generate the yaml file for lkp run sudo bin/lkp run generated-yaml-file # if come across any failure that blocks the test, # please remove ~/.lkp and /lkp dir to run from a clean state. --- 0DAY/LKP+ Test Infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/lkp@lists.01.org Intel Corporation Thanks, Oliver Sang