linux-kernel - [cpufreq] 20a6d4ad1a: INFO:task_blocked_for_more

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Message-ID: <20220512130324.GA36375@xsang-OptiPlex-9020>
Date:   Thu, 12 May 2022 21:03:24 +0800
From:   kernel test robot <oliver.sang@...el.com>
To:     Schspa Shi <schspa@...il.com>
Cc:     0day robot <lkp@...el.com>, LKML <linux-kernel@...r.kernel.org>,
        lkp@...ts.01.org
Subject: [cpufreq]  20a6d4ad1a: INFO:task_blocked_for_more_than#seconds



Greeting,

FYI, we noticed the following commit (built with gcc-11):

commit: 20a6d4ad1a16fd15e55f689392bf849f5f2c99a1 ("cpufreq: fix race on cpufreq online")
url: https://github.com/intel-lab-lkp/linux/commits/UPDATE-20220510-234432/Schspa-Shi/cpufreq-fix-race-on-cpufreq-online/20220421-031616

in testcase: boot

on test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 4G

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


+-----------------------------------------+------------+------------+
|                                         | a8a4f8e63b | 20a6d4ad1a |
+-----------------------------------------+------------+------------+
| boot_successes                          | 30         | 0          |
| boot_failures                           | 0          | 30         |
| INFO:task_blocked_for_more_than#seconds | 0          | 30         |
| BUG:kernel_hang_in_boot_stage           | 0          | 30         |
+-----------------------------------------+------------+------------+


If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@...el.com>


[    4.989357][   T14] input: ImExPS/2 Generic Explorer Mouse as /devices/platform/i8042/serio1/input/input3
[  333.320241][   T10] kworker/dying (10) used greatest stack depth: 7088 bytes left
[  988.667959][   T24] INFO: task swapper/0:1 blocked for more than 491 seconds.
[  988.669822][   T24]       Not tainted 5.18.0-rc3-00088-g20a6d4ad1a16 #1
[  988.671587][   T24] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  988.673843][   T24] task:swapper/0       state:D stack: 6068 pid:    1 ppid:     0 flags:0x00004000
[  988.676248][   T24] Call Trace:
[  988.677199][   T24]  __schedule+0x1c2/0x670
[  988.678516][   T24]  schedule+0x48/0xc0
[  988.679417][   T24]  rwsem_down_write_slowpath+0x1d3/0x360
[  988.680806][   T24]  down_write+0x44/0x50
[  988.681975][   T24]  cpufreq_policy_free+0x10b/0x150
[  988.683328][   T24]  cpufreq_online+0x99/0x6f0
[  988.684566][   T24]  ? text_poke_finish+0x17/0x30
[  988.685860][   T24]  ? __might_sleep+0x30/0x80
[  988.687130][   T24]  cpufreq_add_dev+0x4d/0x80
[  988.688353][   T24]  subsys_interface_register+0xd8/0xf0
[  988.689729][   T24]  cpufreq_register_driver+0x12d/0x230
[  988.691204][   T24]  acpi_cpufreq_init+0x1a1/0x1cc
[  988.692545][   T24]  ? CPU_FREQ_GOV_ONDEMAND_init+0xf/0xf
[  988.702130][   T24]  do_one_initcall+0x3c/0x1c0
[  988.703481][   T24]  ? rdinit_setup+0x38/0x38
[  988.704766][   T24]  do_initcalls+0xf4/0x116
[  988.705937][   T24]  kernel_init_freeable+0xf9/0x129
[  988.707271][   T24]  ? rest_init+0xd0/0xd0
[  988.708492][   T24]  kernel_init+0x15/0x110
[  988.709612][   T24]  ? schedule_tail_wrapper+0x9/0xc
[  988.711004][   T24]  ret_from_fork+0x1c/0x28
BUG: kernel hang in boot stage



To reproduce:

        # build kernel
	cd linux
	cp config-5.18.0-rc3-00088-g20a6d4ad1a16 .config
	make HOSTCC=gcc-11 CC=gcc-11 ARCH=i386 olddefconfig prepare modules_prepare bzImage modules
	make HOSTCC=gcc-11 CC=gcc-11 ARCH=i386 INSTALL_MOD_PATH=<mod-install-dir> modules_install
	cd <mod-install-dir>
	find lib/ | cpio -o -H newc --quiet | gzip > modules.cgz


        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp qemu -k <bzImage> -m modules.cgz job-script # job-script is attached in this email

        # if come across any failure that blocks the test,
        # please remove ~/.lkp and /lkp dir to run from a clean state.



-- 
0-DAY CI Kernel Test Service
https://01.org/lkp



View attachment "config-5.18.0-rc3-00088-g20a6d4ad1a16" of type "text/plain" (132544 bytes)

View attachment "job-script" of type "text/plain" (4866 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (10960 bytes)