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Date: Thu, 20 Jun 2024 16:49:37 +0800
From: Oliver Sang <oliver.sang@...el.com>
To: "Ricardo B. Marliere" <ricardo@...liere.net>
CC: <oe-lkp@...ts.linux.dev>, <lkp@...el.com>, <linux-kernel@...r.kernel.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Tejun Heo <tj@...nel.org>,
<oliver.sang@...el.com>
Subject: Re: [linus:master] [workqueue] 5df9197edd:
BUG:soft_lockup-CPU##stuck_for#s![swapper:#]
sorry, forgot the attachment in last mail.
On Thu, Jun 20, 2024 at 04:46:37PM +0800, kernel test robot wrote:
>
>
> Hello,
>
> kernel test robot noticed "BUG:soft_lockup-CPU##stuck_for#s![swapper:#]" on:
>
> commit: 5df9197edd731a44682444631d68c2384f381bf1 ("workqueue: make wq_subsys const")
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
>
> [test failed on linus/master d20f6b3d747c36889b7ce75ee369182af3decb6b]
> [test failed on linux-next/master 6906a84c482f098d31486df8dc98cead21cce2d0]
>
> in testcase: boot
>
> compiler: gcc-13
> test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G
>
> (please refer to attached dmesg/kmsg for entire log/backtrace)
>
>
> we don't have enough knowledge why this commit could cause random issues,
> while the parent keeps clean even when we run both till 999 times.
>
> =========================================================================================
> compiler/kconfig/rootfs/sleep/tbox_group/testcase:
> gcc-13/i386-randconfig-r015-20211011/debian-11.1-i386-20220923.cgz/1/vm-snb/boot
>
> f297a3844aa059c5 5df9197edd731a44682444631d6
> ---------------- ---------------------------
> fail:runs %reproduction fail:runs
> | | |
> :999 6% 56:999 dmesg.BUG:kernel_hang_in_boot_stage
> :999 1% 8:999 dmesg.BUG:kernel_hang_in_test_stage
> :999 0% 1:999 dmesg.BUG:soft_lockup-CPU##stuck_for#s![kcompactd0:#]
> :999 0% 3:999 dmesg.BUG:soft_lockup-CPU##stuck_for#s![kworker##:#]
> :999 9% 89:999 dmesg.BUG:soft_lockup-CPU##stuck_for#s![swapper:#]
> :999 10% 102:999 dmesg.BUG:workqueue_lockup-pool
> :999 1% 7:999 dmesg.EIP:__do_softirq
> :999 0% 1:999 dmesg.EIP:__down_trylock_console_sem
> :999 1% 10:999 dmesg.EIP:_raw_spin_unlock_irq
> :999 0% 3:999 dmesg.EIP:_raw_spin_unlock_irqrestore
> :999 0% 2:999 dmesg.EIP:console_flush_all
> :999 0% 1:999 dmesg.EIP:console_unlock
> :999 1% 7:999 dmesg.EIP:lock_acquire
> :999 1% 7:999 dmesg.EIP:lock_release
> :999 1% 12:999 dmesg.EIP:raw_spin_rq_unlock_irq
> :999 0% 1:999 dmesg.EIP:rcu_check_gp_start_stall
> :999 0% 2:999 dmesg.EIP:seqcount_lockdep_reader_access
> :999 0% 1:999 dmesg.EIP:tcp_orphan_update
> :999 9% 88:999 dmesg.EIP:tick_clock_notify
> :999 0% 1:999 dmesg.EIP:vprintk_store
> :999 0% 1:999 dmesg.EIP:vsnprintf
> :999 2% 15:999 dmesg.INFO:rcu_preempt_detected_stalls_on_CPUs/tasks
> :999 0% 3:999 dmesg.INFO:rcu_preempt_self-detected_stall_on_CPU
> :999 3% 29:999 dmesg.INFO:task_blocked_for_more_than#seconds
> :999 2% 16:999 dmesg.IP-Config:Auto-configuration_of_network_failed
> :999 3% 29:999 dmesg.Kernel_panic-not_syncing:hung_task:blocked_tasks
> :999 9% 93:999 dmesg.Kernel_panic-not_syncing:softlockup:hung_tasks
> :999 0% 1:999 dmesg.WARNING:at_kernel/rcu/tree_stall.h:#rcu_check_gp_start_stall
>
> one hint we could supply is the config for this test is a randconfig which is
> uploaded to [1]
>
> at the same time, we also tried another config as attached
> not-reproduce-config-6.8.0-rc2-00006-g5df9197edd73
>
> both parent/this commit seem clean in the tests for this config.
>
> =========================================================================================
> compiler/kconfig/rootfs/sleep/tbox_group/testcase:
> gcc-13/i386-debian-10.3-func/debian-11.1-i386-20220923.cgz/1/vm-snb/boot
>
> f297a3844aa059c5 5df9197edd731a44682444631d6
> ---------------- ---------------------------
> fail:runs %reproduction fail:runs
> | | |
> 999:999 0% 999:999 pass
>
>
> but since the diff between two configs are very big, it's hard for us to
> supply further information.
>
> just made this report FYI what we observed in our tests.
> if you have any debug patch want us to test, please let us know. Thanks
>
>
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <oliver.sang@...el.com>
> | Closes: https://lore.kernel.org/oe-lkp/202406201623.d1a3b599-lkp@intel.com
>
>
> [ 696.522062][ C0] watchdog: BUG: soft lockup - CPU#0 stuck for 626s! [swapper:1]
> [ 696.522062][ C0] Modules linked in:
> [ 696.522062][ C0] irq event stamp: 110942
> [ 696.522062][ C0] hardirqs last enabled at (110941): timekeeping_notify (arch/x86/include/asm/irqflags.h:42 arch/x86/include/asm/irqflags.h:77 arch/x86/include/asm/irqflags.h:135 include/linux/stop_machine.h:154 include/linux/stop_machine.h:161 kernel/time/timekeeping.c:1506)
> [ 696.522062][ C0] hardirqs last disabled at (110942): sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1076)
> [ 696.522062][ C0] softirqs last enabled at (110790): __do_softirq (arch/x86/include/asm/preempt.h:26 kernel/softirq.c:400 kernel/softirq.c:582)
> [ 696.522062][ C0] softirqs last disabled at (110779): do_softirq_own_stack (arch/x86/kernel/irq_32.c:57 arch/x86/kernel/irq_32.c:147)
> [ 696.522062][ C0] CPU: 0 PID: 1 Comm: swapper Not tainted 6.8.0-rc2-00006-g5df9197edd73 #1
> [ 696.522062][ C0] EIP: tick_clock_notify (arch/x86/include/asm/bitops.h:55 include/asm-generic/bitops/instrumented-atomic.h:29 kernel/time/tick-sched.c:1607)
> [ 696.522062][ C0] Code: 15 d4 1b 8e 98 8b 45 e4 8b 55 e8 a3 d8 1b 8e 98 89 15 dc 1b 8e 98 89 35 c0 1b 8e 98 89 1d c4 1b 8e 98 83 c4 10 5b 5e 5f 5d c3 <80> 0d e4 1b 8e 98 01 c3 80 0d e4 1b 8e 98 01 c3 0f ba 35 e4 1b 8e
> All code
> ========
> 0: 15 d4 1b 8e 98 adc $0x988e1bd4,%eax
> 5: 8b 45 e4 mov -0x1c(%rbp),%eax
> 8: 8b 55 e8 mov -0x18(%rbp),%edx
> b: a3 d8 1b 8e 98 89 15 movabs %eax,0x1bdc1589988e1bd8
> 12: dc 1b
> 14: 8e 98 89 35 c0 1b mov 0x1bc03589(%rax),%ds
> 1a: 8e 98 89 1d c4 1b mov 0x1bc41d89(%rax),%ds
> 20: 8e 98 83 c4 10 5b mov 0x5b10c483(%rax),%ds
> 26: 5e pop %rsi
> 27: 5f pop %rdi
> 28: 5d pop %rbp
> 29: c3 ret
> 2a:* 80 0d e4 1b 8e 98 01 orb $0x1,-0x6771e41c(%rip) # 0xffffffff988e1c15 <-- trapping instruction
> 31: c3 ret
> 32: 80 0d e4 1b 8e 98 01 orb $0x1,-0x6771e41c(%rip) # 0xffffffff988e1c1d
> 39: c3 ret
> 3a: 0f .byte 0xf
> 3b: ba 35 e4 1b 8e mov $0x8e1be435,%edx
>
> Code starting with the faulting instruction
> ===========================================
> 0: 80 0d e4 1b 8e 98 01 orb $0x1,-0x6771e41c(%rip) # 0xffffffff988e1beb
> 7: c3 ret
> 8: 80 0d e4 1b 8e 98 01 orb $0x1,-0x6771e41c(%rip) # 0xffffffff988e1bf3
> f: c3 ret
> 10: 0f .byte 0xf
> 11: ba 35 e4 1b 8e mov $0x8e1be435,%edx
> [ 696.522062][ C0] EAX: 0001b15d EBX: 984678a0 ECX: 00000006 EDX: 83f6d220
> [ 696.522062][ C0] ESI: 988e0820 EDI: 00000001 EBP: 82d17ed8 ESP: 82d17ec0
> [ 696.522062][ C0] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00000202
> [ 696.522062][ C0] CR0: 80050033 CR2: ffda9000 CR3: 18c90000 CR4: 000406d0
> [ 696.522062][ C0] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
> [ 696.522062][ C0] DR6: fffe0ff0 DR7: 00000400
> [ 696.522062][ C0] Call Trace:
> [ 696.522062][ C0] ? show_regs (arch/x86/kernel/dumpstack.c:478 (discriminator 1))
> [ 696.522062][ C0] ? watchdog_timer_fn (kernel/watchdog.c:545)
> [ 696.522062][ C0] ? __hrtimer_run_queues+0x10b/0x196
> [ 696.522062][ C0] ? schedule_work (drivers/usb/core/hub.c:890)
> [ 696.522062][ C0] ? hrtimer_run_queues (kernel/time/hrtimer.c:1928)
> [ 696.522062][ C0] ? update_process_times (kernel/time/timer.c:2065 (discriminator 2) kernel/time/timer.c:2086 (discriminator 2))
> [ 696.522062][ C0] ? tick_periodic+0xb0/0xb2
> [ 696.522062][ C0] ? tick_handle_periodic (kernel/time/tick-common.c:145)
> [ 696.522062][ C0] ? sysvec_hyperv_stimer0 (arch/x86/kernel/apic/apic.c:1076)
> [ 696.522062][ C0] ? __sysvec_apic_timer_interrupt (arch/x86/include/asm/atomic.h:23 include/linux/atomic/atomic-arch-fallback.h:457 include/linux/jump_label.h:260 include/linux/jump_label.h:270 arch/x86/include/asm/trace/irq_vectors.h:41 arch/x86/kernel/apic/apic.c:1083)
> [ 696.522062][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1076 (discriminator 4))
> [ 696.522062][ C0] ? handle_exception (arch/x86/entry/entry_32.S:1056)
> [ 696.522062][ C0] ? sysvec_hyperv_stimer0 (arch/x86/kernel/apic/apic.c:1076)
> [ 696.522062][ C0] ? tick_cancel_sched_timer (arch/x86/include/asm/bitops.h:55 include/asm-generic/bitops/instrumented-atomic.h:29 kernel/time/tick-sched.c:1607)
> [ 696.522062][ C0] ? sysvec_hyperv_stimer0 (arch/x86/kernel/apic/apic.c:1076)
> [ 696.522062][ C0] ? tick_cancel_sched_timer (arch/x86/include/asm/bitops.h:55 include/asm-generic/bitops/instrumented-atomic.h:29 kernel/time/tick-sched.c:1607)
> [ 696.522062][ C0] ? timekeeping_notify (kernel/time/timekeeping.c:1508)
> [ 696.522062][ C0] __clocksource_select (kernel/time/clocksource.c:1047 (discriminator 1))
> [ 696.522062][ C0] ? boot_override_clock (kernel/time/clocksource.c:1079)
> [ 696.522062][ C0] clocksource_select (kernel/time/clocksource.c:1064)
> [ 696.522062][ C0] clocksource_done_booting (kernel/time/clocksource.c:1088)
> [ 696.522062][ C0] do_one_initcall (init/main.c:1236)
> [ 696.522062][ C0] ? parse_args (kernel/params.c:168)
> [ 696.522062][ C0] do_initcalls (init/main.c:1297 (discriminator 3) init/main.c:1314 (discriminator 3))
> [ 696.522062][ C0] ? rest_init (init/main.c:1433)
> [ 696.522062][ C0] kernel_init_freeable (init/main.c:1553)
> [ 696.522062][ C0] kernel_init (init/main.c:1443)
> [ 696.522062][ C0] ret_from_fork (arch/x86/kernel/process.c:153)
> [ 696.522062][ C0] ? rest_init (init/main.c:1433)
> [ 696.522062][ C0] ret_from_fork_asm (arch/x86/entry/entry_32.S:741)
> [ 696.522062][ C0] entry_INT80_32 (arch/x86/entry/entry_32.S:947)
> [ 696.522062][ C0] Kernel panic - not syncing: softlockup: hung tasks
> [ 696.522062][ C0] CPU: 0 PID: 1 Comm: swapper Tainted: G L 6.8.0-rc2-00006-g5df9197edd73 #1
> [ 696.522062][ C0] Call Trace:
> [ 696.522062][ C0] dump_stack_lvl (lib/dump_stack.c:107 (discriminator 1))
> [ 696.522062][ C0] dump_stack (lib/dump_stack.c:114)
> [ 696.522062][ C0] panic (kernel/panic.c:362)
> [ 696.522062][ C0] watchdog_timer_fn (kernel/watchdog.c:519)
> [ 696.522062][ C0] __hrtimer_run_queues+0x10b/0x196
> [ 696.522062][ C0] ? schedule_work (drivers/usb/core/hub.c:890)
> [ 696.522062][ C0] hrtimer_run_queues (kernel/time/hrtimer.c:1928)
> [ 696.522062][ C0] update_process_times (kernel/time/timer.c:2065 (discriminator 2) kernel/time/timer.c:2086 (discriminator 2))
> [ 696.522062][ C0] tick_periodic+0xb0/0xb2
> [ 696.522062][ C0] tick_handle_periodic (kernel/time/tick-common.c:145)
> [ 696.522062][ C0] ? sysvec_hyperv_stimer0 (arch/x86/kernel/apic/apic.c:1076)
> [ 696.522062][ C0] __sysvec_apic_timer_interrupt (arch/x86/include/asm/atomic.h:23 include/linux/atomic/atomic-arch-fallback.h:457 include/linux/jump_label.h:260 include/linux/jump_label.h:270 arch/x86/include/asm/trace/irq_vectors.h:41 arch/x86/kernel/apic/apic.c:1083)
> [ 696.522062][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1076 (discriminator 4))
> [ 696.522062][ C0] handle_exception (arch/x86/entry/entry_32.S:1056)
> [ 696.522062][ C0] EIP: tick_clock_notify (arch/x86/include/asm/bitops.h:55 include/asm-generic/bitops/instrumented-atomic.h:29 kernel/time/tick-sched.c:1607)
> [ 696.522062][ C0] Code: 15 d4 1b 8e 98 8b 45 e4 8b 55 e8 a3 d8 1b 8e 98 89 15 dc 1b 8e 98 89 35 c0 1b 8e 98 89 1d c4 1b 8e 98 83 c4 10 5b 5e 5f 5d c3 <80> 0d e4 1b 8e 98 01 c3 80 0d e4 1b 8e 98 01 c3 0f ba 35 e4 1b 8e
> All code
> ========
> 0: 15 d4 1b 8e 98 adc $0x988e1bd4,%eax
> 5: 8b 45 e4 mov -0x1c(%rbp),%eax
> 8: 8b 55 e8 mov -0x18(%rbp),%edx
> b: a3 d8 1b 8e 98 89 15 movabs %eax,0x1bdc1589988e1bd8
> 12: dc 1b
> 14: 8e 98 89 35 c0 1b mov 0x1bc03589(%rax),%ds
> 1a: 8e 98 89 1d c4 1b mov 0x1bc41d89(%rax),%ds
> 20: 8e 98 83 c4 10 5b mov 0x5b10c483(%rax),%ds
> 26: 5e pop %rsi
> 27: 5f pop %rdi
> 28: 5d pop %rbp
> 29: c3 ret
> 2a:* 80 0d e4 1b 8e 98 01 orb $0x1,-0x6771e41c(%rip) # 0xffffffff988e1c15 <-- trapping instruction
> 31: c3 ret
> 32: 80 0d e4 1b 8e 98 01 orb $0x1,-0x6771e41c(%rip) # 0xffffffff988e1c1d
> 39: c3 ret
> 3a: 0f .byte 0xf
> 3b: ba 35 e4 1b 8e mov $0x8e1be435,%edx
>
> Code starting with the faulting instruction
> ===========================================
> 0: 80 0d e4 1b 8e 98 01 orb $0x1,-0x6771e41c(%rip) # 0xffffffff988e1beb
> 7: c3 ret
> 8: 80 0d e4 1b 8e 98 01 orb $0x1,-0x6771e41c(%rip) # 0xffffffff988e1bf3
> f: c3 ret
> 10: 0f .byte 0xf
> 11: ba 35 e4 1b 8e mov $0x8e1be435,%edx
>
>
> [1]
> The kernel config and materials to reproduce are available at:
> https://download.01.org/0day-ci/archive/20240620/202406201623.d1a3b599-lkp@intel.com
>
>
>
> --
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests/wiki
>
View attachment "not-reproduce-config-6.8.0-rc2-00006-g5df9197edd73" of type "text/plain" (175961 bytes)
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