FYI, we noticed the following commit:

commit: 75dddef32514f7aa58930bde6a1263253bc3d4ba ("mm: ratelimit PFNs busy info message")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

in testcase: vm-scalability
with following parameters:

	runtime: 300s
	test: mmap-xread-seq-mt
	cpufreq_governor: performance

test-description: The motivation behind this suite is to exercise functions and regions of the mm/ of the Linux kernel which are of interest to us.
test-url: https://git.kernel.org/cgit/linux/kernel/git/wfg/vm-scalability.git/


on test machine: 56 threads Intel(R) Xeon(R) CPU E5-2695 v3 @ 2.30GHz with 256G memory

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


+----------------+------------+------------+
|                | d507e2ebd2 | 75dddef325 |
+----------------+------------+------------+
| boot_successes | 4          | 4          |
+----------------+------------+------------+



kern  :info  : [   16.830219] Freeing unused kernel memory: 48K
kern  :info  : [   16.835093] rodata_test: all tests were successful
daemon:info  : [   16.844956] systemd[1]: RTC configured in localtime, applying delta of 480 minutes to system time.
kern  :info  : [   16.856164] ip_tables: (C) 2000-2006 Netfilter Core Team
kern  :info  : [   17.074275] ipmi message handler version 39.2
kern  :err   : [   17.074553] ACPI Error: No handler for Region [SYSI] (ffff883fe28042d0) [IPMI] (20170531/evregion-166)
kern  :err   : [   17.074558] ACPI Error: Region IPMI (ID=7) has no handler (20170531/exfldio-299)
kern  :err   : [   17.074570] ACPI Error: Method parse/execution failed \_SB.PMI0._GHL, AE_NOT_EXIST (20170531/psparse-550)
kern  :err   : [   17.074605] ACPI Error: Method parse/execution failed \_SB.PMI0._PMC, AE_NOT_EXIST (20170531/psparse-550)
kern  :err   : [   17.074637] ACPI Exception: AE_NOT_EXIST, Evaluating _PMC (20170531/power_meter-755)
kern  :info  : [   17.128658] input: PC Speaker as /devices/platform/pcspkr/input/input2
kern  :info  : [   17.137094] shpchp: Standard Hot Plug PCI Controller Driver version: 0.4
kern  :info  : [   17.144771] ipmi device interface
kern  :info  : [   17.150805] ipmi_si: probing via SMBIOS


To reproduce:

        git clone https://github.com/01org/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml



Thanks,
Kernel Test Robot