On Mon, Mar 29, 2021 at 04:37:15PM +0800, kernel test robot wrote:

Greeting,

FYI, we noticed the following commit (built with gcc-9):

commit: 28c9dada655513462112084f5f1769ee49d6fe87 ("[PATCH rfc 3/4] percpu: on demand chunk depopulation")
url: https://github.com/0day-ci/linux/commits/Roman-Gushchin/percpu-partial-chunk-depopulation/20210325-030746
base: https://git.kernel.org/cgit/linux/kernel/git/dennis/percpu.git for-next

in testcase: trinity
version: trinity-i386-4d2343bd-1_20200320
with following parameters:

	group: group-01

test-description: Trinity is a linux system call fuzz tester.
test-url: http://codemonkey.org.uk/projects/trinity/ 


on test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 16G

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):


+---------------------------------------------------------+------------+------------+
|                                                         | 0a6ed3d793 | 28c9dada65 |
+---------------------------------------------------------+------------+------------+
| boot_successes                                          | 6          | 0          |
| boot_failures                                           | 0          | 6          |
| invoked_oom-killer:gfp_mask=0x                          | 0          | 6          |
| Mem-Info                                                | 0          | 6          |
| Out_of_memory_and_no_killable_processes                 | 0          | 6          |
| Kernel_panic-not_syncing:System_is_deadlocked_on_memory | 0          | 6          |
+---------------------------------------------------------+------------+------------+

Found and fixed the problem. V2 will include the fix.

Thanks!