linux-kernel - [clocksource] 440391bb72: WARNING:at_kernel/time/clocksource.c:#clocksource

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Date:   Thu, 27 Sep 2018 14:37:53 +0800
From:   kernel test robot <rong.a.chen@...el.com>
To:     Waiman Long <longman@...hat.com>
Cc:     John Stultz <john.stultz@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-kernel@...r.kernel.org, Stephen Boyd <sboyd@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Waiman Long <longman@...hat.com>, lkp@...org
Subject: [clocksource] 440391bb72:
 WARNING:at_kernel/time/clocksource.c:#clocksource_watchdog

FYI, we noticed the following commit (built with gcc-7):

commit: 440391bb72aa95c102e3d9ef006ce1e313a89117 ("[PATCH v3] clocksource: Warn if too many missing ticks are detected")
url: https://github.com/0day-ci/linux/commits/Waiman-Long/clocksource-Warn-if-too-many-missing-ticks-are-detected/20180925-150152


in testcase: autotest
with following parameters:

	test: pi_tests

test-description: Autotest is a framework for fully automated testing. It is designed primarily to test the Linux kernel, though it is useful for many other functions such as qualifying new hardware.
test-url: https://github.com/autotest/autotest


on test machine: qemu-system-x86_64 -enable-kvm -cpu qemu64,+ssse3 -smp 4 -m 8G

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


+------------------------------------------------------------+------------+------------+
|                                                            | 9ac669fc01 | 440391bb72 |
+------------------------------------------------------------+------------+------------+
| boot_successes                                             | 56         | 14         |
| boot_failures                                              | 1          | 4          |
| BUG:kernel_hang_in_test_stage                              | 1          |            |
| WARNING:at_kernel/time/clocksource.c:#clocksource_watchdog | 0          | 4          |
| RIP:clocksource_watchdog                                   | 0          | 4          |
+------------------------------------------------------------+------------+------------+



[  315.330209] WARNING: CPU: 3 PID: 27 at kernel/time/clocksource.c:218 clocksource_watchdog+0x353/0x360
[  315.333092] Modules linked in: sd_mod sg ata_generic pata_acpi ppdev snd_pcm virtio_scsi snd_timer snd soundcore pcspkr ata_piix serio_raw i2c_piix4 libata parport_pc parport floppy ip_tables
[  315.337348] CPU: 3 PID: 27 Comm: ksoftirqd/3 Not tainted 4.19.0-rc1-00018-g440391b #1
[  315.339492] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[  315.341746] RIP: 0010:clocksource_watchdog+0x353/0x360
[  315.343127] Code: 89 f9 4c 89 ea 48 c7 c7 40 6c 2d 82 e8 a4 d5 fd ff 48 89 df e8 5e fc ff ff e9 41 fd ff ff 48 c7 c7 40 6b 2d 82 e8 8b d5 fd ff <0f> 0b e9 fb fc ff ff 66 0f 1f 44 00 00 0f 1f 44 00 00 41 57 41 56
[  315.347738] RSP: 0018:ffffc90000d3fd78 EFLAGS: 00010286
[  315.349133] RAX: 000000000000002e RBX: 0000000000000100 RCX: 0000000000000000
[  315.350939] RDX: 0000000000000000 RSI: ffff88023fd96898 RDI: ffff88023fd96898
[  315.352728] RBP: ffff88023fd9ab00 R08: 0000000000000000 R09: 000000000000002e
[  315.354523] R10: ffffc90000d3fdf0 R11: ffffffff82f86fcd R12: ffffffff83098b40
[  315.356317] R13: ffffffff811168e0 R14: ffffc90000d3fde0 R15: ffffffff810b578e
[  315.358114] FS:  0000000000000000(0000) GS:ffff88023fd80000(0000) knlGS:0000000000000000
[  315.360301] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  315.361804] CR2: 00007f8a4ce35670 CR3: 000000000260a000 CR4: 00000000000006e0
[  315.363605] Call Trace:
[  315.364430]  ? __switch_to_asm+0x40/0x70
[  315.365563]  ? __clocksource_unstable+0x60/0x60
[  315.366831]  ? smpboot_thread_fn+0x14e/0x1e0
[  315.368030]  call_timer_fn+0x2b/0x140
[  315.369102]  run_timer_softirq+0x427/0x480
[  315.370290]  ? vfree_atomic+0x33/0x60
[  315.371407]  ? put_task_stack+0x75/0xf0
[  315.372561]  ? finish_task_switch+0x207/0x2a0
[  315.373826]  ? smpboot_thread_fn+0x14e/0x1e0
[  315.375074]  __do_softirq+0xe3/0x2d9
[  315.376175]  ? smpboot_thread_fn+0x2f/0x1e0
[  315.377400]  ? smpboot_thread_fn+0x74/0x1e0
[  315.378636]  ? smpboot_thread_fn+0x14e/0x1e0
[  315.379880]  run_ksoftirqd+0x26/0x50
[  315.380973]  smpboot_thread_fn+0x149/0x1e0
[  315.382181]  ? sort_range+0x20/0x20
[  315.383259]  kthread+0x11e/0x140
[  315.384282]  ? kthread_associate_blkcg+0xb0/0xb0
[  315.385602]  ret_from_fork+0x35/0x40
[  315.386700] ---[ end trace fcc27924f4248295 ]---


To reproduce:

        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



Thanks,
lkp

View attachment "config-4.19.0-rc1-00018-g440391b" of type "text/plain" (167672 bytes)

View attachment "job-script" of type "text/plain" (6737 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (22068 bytes)

View attachment "autotest" of type "text/plain" (30866 bytes)