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Date: Fri, 30 Oct 2020 22:38:45 +0800
From: kernel test robot <rong.a.chen@...el.com>
To: Daniel Vetter <daniel.vetter@...ll.ch>
Cc: Thomas Zimmermann <tzimmermann@...e.de>,
Melissa Wen <melissa.srw@...il.com>,
Daniel Vetter <daniel.vetter@...el.com>,
Rodrigo Siqueira <rodrigosiqueiramelo@...il.com>,
Haneen Mohammed <hamohammed.sa@...il.com>,
Daniel Vetter <daniel@...ll.ch>,
LKML <linux-kernel@...r.kernel.org>,
Linux Memory Management List <linux-mm@...ck.org>,
lkp@...ts.01.org, lkp@...el.com
Subject: [drm/vkms] ea40d7857d:
WARNING:at_drivers/gpu/drm/vkms/vkms_crtc.c:#vkms_vblank_simulate
Greeting,
FYI, we noticed the following commit (built with gcc-9):
commit: ea40d7857d5250e5400f38c69ef9e17321e9c4a2 ("drm/vkms: fbdev emulation support")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
in testcase: boot
on test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 8G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+-------------------------------------------------------------------+------------+------------+
| | 23fae9cf97 | ea40d7857d |
+-------------------------------------------------------------------+------------+------------+
| boot_successes | 56 | 40 |
| boot_failures | 0 | 20 |
| WARNING:at_drivers/gpu/drm/vkms/vkms_crtc.c:#vkms_vblank_simulate | 0 | 20 |
| EIP:vkms_vblank_simulate | 0 | 20 |
| EIP:e1000_raise_ee_clk | 0 | 1 |
| EIP:e1000_lower_ee_clk | 0 | 1 |
| EIP:___might_sleep | 0 | 14 |
| EIP:lock_acquire | 0 | 4 |
| EIP:default_idle | 0 | 13 |
| EIP:generic_exec_single | 0 | 4 |
| EIP:stutter_wait | 0 | 3 |
| EIP:delay_tsc | 0 | 9 |
| EIP:_raw_spin_unlock_irqrestore | 0 | 5 |
| EIP:torture_random | 0 | 1 |
| EIP:console_unlock | 0 | 6 |
| EIP:_raw_spin_unlock_irq | 0 | 3 |
| EIP:_raw_spin_unlock | 0 | 1 |
| EIP:kthread_should_stop | 0 | 1 |
| EIP:__do_softirq | 0 | 3 |
| INFO:rcu_preempt_self-detected_stall_on_CPU | 0 | 1 |
| EIP:exit_to_user_mode_prepare | 0 | 1 |
| EIP:acpi_ut_update_object_reference | 0 | 1 |
| EIP:queued_spin_lock_slowpath | 0 | 1 |
| EIP:check_preemption_disabled | 0 | 1 |
| EIP:preempt_schedule_irq | 0 | 1 |
| EIP:from_kuid_munged | 0 | 1 |
| EIP:lock_release | 0 | 1 |
| WARNING:at_net/sched/sch_generic.c:#dev_watchdog | 0 | 1 |
| EIP:dev_watchdog | 0 | 1 |
+-------------------------------------------------------------------+------------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <rong.a.chen@...el.com>
[ 71.976352] WARNING: CPU: 0 PID: 0 at drivers/gpu/drm/vkms/vkms_crtc.c:21 vkms_vblank_simulate+0x130/0x140
[ 71.978893] Modules linked in: uvesafb aesni_intel floppy processor evdev input_leds psmouse pcspkr
[ 71.981347] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.9.0-rc5-01227-gea40d7857d525 #1
[ 72.006908] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[ 72.009579] EIP: vkms_vblank_simulate+0x130/0x140
[ 72.010999] Code: 00 00 ff b7 4c 01 00 00 68 04 e2 54 c5 6a 02 89 55 ec 89 4d f0 e8 d0 d8 fe ff 8b 55 ec 8b 4d f0 83 c4 18 eb 80 8d 74 26 00 90 <0f> 0b e9 02 ff ff ff 8d b4 26 00 00 00 00 66 90 55 89 e5 57 56 53
[ 72.015911] EAX: 00000003 EBX: f65df328 ECX: f65df328 EDX: 00000000
[ 72.018281] ESI: 00fe4c00 EDI: 00000000 EBP: c5637e24 ESP: c5637e10
[ 72.020737] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00210006
[ 72.023286] CR0: 80050033 CR2: 020cf844 CR3: 0581c000 CR4: 000406d0
[ 72.025641] Call Trace:
[ 72.027494] __hrtimer_run_queues+0xb5/0x1a0
[ 72.029556] ? vkms_disable_vblank+0x10/0x10
[ 72.031643] hrtimer_interrupt+0x115/0x260
[ 72.033615] ? sysvec_call_function_single+0x30/0x30
[ 72.035676] __sysvec_apic_timer_interrupt+0x5a/0xa0
[ 72.037664] sysvec_apic_timer_interrupt+0x1a/0x30
[ 72.039653] handle_exception+0x165/0x165
[ 72.041492] EIP: default_idle+0xe/0x10
[ 72.043412] Code: 66 90 0f ae 38 0f ae f0 66 66 90 eb bc 8d b4 26 00 00 00 00 fb eb d9 8d 74 26 00 90 e9 07 00 00 00 0f 00 2d 1a 20 dc c4 fb f4 <c3> cc 55 89 e5 56 53 89 c3 e8 04 86 ff ff 89 c2 a1 7c b9 82 c5 03
[ 72.052922] EAX: 0001026e EBX: 00000000 ECX: 00000000 EDX: c55a67ed
[ 72.055250] ESI: 00000000 EDI: 00000000 EBP: c5637f2c ESP: c5637f28
[ 72.057416] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00200212
[ 72.059739] ? sysvec_call_function_single+0x30/0x30
[ 72.061810] ? sysvec_call_function_single+0x30/0x30
[ 72.063965] ? default_idle+0xe/0x10
[ 72.065876] ? arch_cpu_idle+0x9/0x10
[ 72.067870] default_idle_call+0x23/0x40
[ 72.069827] do_idle+0x165/0x170
[ 72.071743] cpu_startup_entry+0x1d/0x20
[ 72.073707] rest_init+0xf8/0xfd
[ 72.075527] arch_call_rest_init+0x8/0xb
[ 72.077422] start_kernel+0x5f9/0x607
[ 72.079414] ? early_idt_handler_common+0x50/0x50
[ 72.081446] i386_start_kernel+0x43/0x45
[ 72.083396] startup_32_smp+0x164/0x170
[ 72.085234] ---[ end trace 9b827069a4cfe883 ]---
To reproduce:
# build kernel
cd linux
cp config-5.9.0-rc5-01227-gea40d7857d525 .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
Thanks,
Rong Chen
View attachment "config-5.9.0-rc5-01227-gea40d7857d525" of type "text/plain" (157651 bytes)
View attachment "job-script" of type "text/plain" (4610 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (17808 bytes)
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