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          |
+---------------------------------------------------------+------------+------------+


If you fix the issue, kindly add following tag
Reported-by: kernel test robot <redacted>



[   72.401445] sched_clock: Marking stable (72389059227, 7785428)->(72395497054, 1347601)
[   72.406619] Key type ._fscrypt registered
[   72.407360] Key type .fscrypt registered
[   72.408007] Key type fscrypt-provisioning registered
[   72.408830] kAFS: Red Hat AFS client v0.1 registering.
[   74.658476] kthreadd invoked oom-killer: gfp_mask=0x400dc0(GFP_KERNEL_ACCOUNT|__GFP_ZERO), order=1, oom_score_adj=0
[   74.660419] CPU: 0 PID: 2 Comm: kthreadd Not tainted 5.11.0-rc7-00006-g28c9dada6555 #2
[   74.661823] Call Trace:
[   74.662271] dump_stack (kbuild/src/consumer/lib/dump_stack.c:131) 
[   74.662854] dump_header (kbuild/src/consumer/mm/oom_kill.c:464) 
[   74.663464] out_of_memory (kbuild/src/consumer/mm/oom_kill.c:1107) 
[   74.664143] __alloc_pages_slowpath+0x6fa/0x7bc 
[   74.665117] __alloc_pages_nodemask (kbuild/src/consumer/mm/page_alloc.c:5014) 


To reproduce:

        # build kernel
	cd linux
	cp config-5.11.0-rc7-00006-g28c9dada6555 .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 <bzImage> 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