Greeting, FYI, we noticed the following commit (built with gcc-9): commit: 866b485262173a2b873386162b2ddcfbcb542b4a ("mm/page_owner: record the timestamp of all pages during free") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master in testcase: trinity version: trinity-static-i386-x86_64-f93256fb_2019-08-28 with following parameters: runtime: 300s test-description: Trinity is a linux system call fuzz tester. test-url: http://codemonkey.org.uk/projects/trinity/ on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): +---------------------------------------------------------+------------+------------+ | | 0b5121ef85 | 866b485262 | +---------------------------------------------------------+------------+------------+ | boot_successes | 25 | 0 | | boot_failures | 0 | 28 | | invoked_oom-killer:gfp_mask=0x | 0 | 28 | | Mem-Info | 0 | 28 | | Out_of_memory_and_no_killable_processes | 0 | 28 | | Kernel_panic-not_syncing:System_is_deadlocked_on_memory | 0 | 28 | +---------------------------------------------------------+------------+------------+ If you fix the issue, kindly add following tag Reported-by: kernel test robot [ 291.773251][ C0] CE: hpet increased min_delta_ns to 7500 nsec [ 291.773294][ C0] CE: hpet increased min_delta_ns to 11250 nsec [ 292.081092][ C0] CE: hpet increased min_delta_ns to 16875 nsec [ 292.081236][ C0] CE: hpet increased min_delta_ns to 25312 nsec [ 292.081408][ C0] CE: hpet increased min_delta_ns to 37968 nsec [ 292.359657][ T1] swapper invoked oom-killer: gfp_mask=0x100cc0(GFP_USER), order=0, oom_score_adj=0 [ 292.360692][ T1] CPU: 0 PID: 1 Comm: swapper Not tainted 5.12.0-11178-g866b48526217 #1 [ 292.361945][ T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 292.362811][ T1] Call Trace: [ 292.363140][ T1] dump_stack (kbuild/src/consumer/lib/dump_stack.c:131) [ 292.363551][ T1] dump_header (kbuild/src/consumer/mm/oom_kill.c:463) [ 292.363969][ T1] ? out_of_memory (kbuild/src/consumer/include/linux/rcupdate.h:710 kbuild/src/consumer/mm/oom_kill.c:379 kbuild/src/consumer/mm/oom_kill.c:1102 kbuild/src/consumer/mm/oom_kill.c:1048) [ 292.364439][ T1] out_of_memory.cold (kbuild/src/consumer/mm/oom_kill.c:1106 kbuild/src/consumer/mm/oom_kill.c:1048) [ 292.365422][ T1] __alloc_pages_slowpath+0x73e/0xbc0 To reproduce: # build kernel cd linux cp config-5.12.0-11178-g866b48526217 .config make HOSTCC=gcc-9 CC=gcc-9 ARCH=i386 olddefconfig prepare modules_prepare bzImage git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp qemu -k job-script # job-script is attached in this email --- 0DAY/LKP+ Test Infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/lkp@lists.01.org Intel Corporation Thanks, Oliver Sang