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Date: Tue, 17 Sep 2013 17:15:27 -0400 (EDT) From: Vince Weaver <vincent.weaver@...ne.edu> To: Vince Weaver <vincent.weaver@...ne.edu> cc: linux-kernel@...r.kernel.org, Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, Arnaldo Carvalho de Melo <acme@...stprotocols.net>, Dave Jones <davej@...hat.com> Subject: Re: perf-related lockup on 3.11 On Wed, 11 Sep 2013, Vince Weaver wrote: > > I got this hard lockup running my perf_fuzzer on 3.11 on a core2. > I guess I should try to reproduce it on linus-git but was hoping > I could wait until -rc1 before trying that. OK, I can also lock up 3.12-rc1 using the perf_fuzzer. Last message logged is below. The system won't respond, even to sysrq (well, the serial port equiv) and then after a while alarming file system/disk warnings start popping up presumably because interrupts aren't working anymore. [ 1173.553545] perf samples too long (2501 > 2500), lowering kernel.perf_event_max_sample_rate to 50000 [ 1173.556002] INFO: NMI handler (perf_event_nmi_handler) took too long to run: 2.464 msecs [ 1314.102904] hrtimer: interrupt took 3787 ns [ 1351.896018] ------------[ cut here ]------------ [ 1351.896018] WARNING: CPU: 0 PID: 3718 at kernel/watchdog.c:245 watchdog_overflow_callback+0x9b/0xa6() [ 1351.896018] Watchdog detected hard LOCKUP on cpu 0 [ 1351.896018] Modules linked in: cpufreq_userspace cpufreq_stats cpufreq_powersave cpufreq_conservative f71882fg evdev pcspkr ohci_pci psmouse mcs7830 serio_raw usbnet ohci_hcd coretemp i2c_nforce2 video wmi acpi_cpufreq button processor thermal_sys sg ehci_pci sd_mod ehci_hcd usbcore usb_common [ 1351.896018] CPU: 0 PID: 3718 Comm: perf_fuzzer Not tainted 3.12.0-rc1 #1 [ 1351.896018] Hardware name: AOpen DE7000/nMCP7ALPx-DE R1.06 Oct.19.2012, BIOS 080015 10/19/2012 [ 1351.896018] 00000000000000f5 ffff88011fc07c48 ffffffff8151a026 ffff88011fc07c58 [ 1351.896018] ffffffff8103cd58 ffffffff817fa8e9 ffffffff810a0e6c ffff88011b313400 [ 1351.896018] ffff88011fc07ef8 ffff88011fc07d58 0000000000000000 ffff88011fc07ca8 [ 1351.896018] Call Trace: [ 1351.896018] <NMI> [<ffffffff8151a026>] ? dump_stack+0x41/0x53 [ 1351.896018] [<ffffffff8103cd58>] ? warn_slowpath_common+0x81/0x9c [ 1351.896018] [<ffffffff810a0e6c>] ? watchdog_overflow_callback+0x9b/0xa6 [ 1351.896018] [<ffffffff8103ce15>] ? warn_slowpath_fmt+0x46/0x48 [ 1351.896018] [<ffffffff810a0dda>] ? watchdog_overflow_callback+0x9/0xa6 [ 1351.896018] [<ffffffff810a0e6c>] ? watchdog_overflow_callback+0x9b/0xa6 [ 1351.896018] [<ffffffff810ca0eb>] ? __perf_event_overflow+0x12e/0x1ab [ 1351.896018] [<ffffffff8101806f>] ? intel_pmu_save_and_restart+0xe/0x22 [ 1351.896018] [<ffffffff81018cbd>] ? intel_pmu_handle_irq+0x2b8/0x34d [ 1351.896018] [<ffffffff81523e7c>] ? ftrace_call+0x5/0x2f [ 1351.896018] [<ffffffff810a7d02>] ? ftrace_ops_test+0x40/0x78 [ 1351.896018] [<ffffffff8151e9b3>] ? perf_event_nmi_handler+0x24/0x3d [ 1351.896018] [<ffffffff8151e2f2>] ? nmi_handle+0x5e/0x13a [ 1351.896018] [<ffffffff810a1610>] ? rcu_nmi_enter+0x9/0x5b [ 1351.896018] [<ffffffff8151e475>] ? do_nmi+0xa7/0x2bd [ 1351.896018] [<ffffffff8111f1d7>] ? send_sigio_to_task+0xc6/0xf5 [ 1351.896018] [<ffffffff8151da77>] ? end_repeat_nmi+0x1e/0x2e [ 1351.896018] [<ffffffff8111f1d7>] ? send_sigio_to_task+0xc6/0xf5 [ 1351.896018] [<ffffffff8104b023>] ? do_send_sig_info+0xf/0x75 [ 1351.896018] [<ffffffff8104b023>] ? do_send_sig_info+0xf/0x75 [ 1351.896018] [<ffffffff810a7d02>] ? ftrace_ops_test+0x40/0x78 [ 1351.896018] [<ffffffff810a7d02>] ? ftrace_ops_test+0x40/0x78 [ 1351.896018] [<ffffffff810a7d02>] ? ftrace_ops_test+0x40/0x78 [ 1351.896018] <<EOE>> <IRQ> [<ffffffff8104b023>] ? do_send_sig_info+0xf/0x75 [ 1351.896018] [<ffffffff810a8d1c>] ? ftrace_ops_control_func+0x88/0xc8 [ 1351.896018] [<ffffffff810a8d2e>] ? ftrace_ops_control_func+0x9a/0xc8 [ 1351.896018] [<ffffffff81523e7c>] ? ftrace_call+0x5/0x2f [ 1351.896018] [<ffffffff8111f11d>] ? send_sigio_to_task+0xc/0xf5 [ 1351.896018] [<ffffffff810a8d2e>] ? ftrace_ops_control_func+0x9a/0xc8 [ 1351.896018] [<ffffffff8104b028>] ? do_send_sig_info+0x14/0x75 [ 1351.896018] [<ffffffff810a2904>] ? rcu_irq_enter+0xd/0x75 [ 1351.896018] [<ffffffff8104b028>] ? do_send_sig_info+0x14/0x75 [ 1351.896018] [<ffffffff8111f1d7>] ? send_sigio_to_task+0xc6/0xf5 [ 1351.896018] [<ffffffff8151d164>] ? _raw_spin_lock_irqsave+0x4/0x2d [ 1351.896018] [<ffffffff810a2904>] ? rcu_irq_enter+0xd/0x75 [ 1351.896018] [<ffffffff8151cf82>] ? _raw_read_lock+0x9/0x15 [ 1351.896018] [<ffffffff8111f21c>] ? send_sigio+0x16/0xdd [ 1351.896018] [<ffffffff8111f2b0>] ? send_sigio+0xaa/0xdd [ 1351.896018] [<ffffffff8151d169>] ? _raw_spin_lock_irqsave+0x9/0x2d [ 1351.896018] [<ffffffff8111f34c>] ? kill_fasync+0x69/0x86 [ 1351.896018] [<ffffffff810ca850>] ? perf_event_wakeup+0x8c/0xa1 [ 1351.896018] [<ffffffff810c472b>] ? __irq_work_run+0x5f/0x7b [ 1351.896018] [<ffffffff81005f82>] ? smp_trace_irq_work_interrupt+0x4b/0x7e [ 1351.896018] [<ffffffff8152578a>] ? trace_irq_work_interrupt+0x6a/0x70 [ 1351.896018] [<ffffffff810a1930>] ? __note_gp_changes+0xc/0x54 [ 1351.896018] [<ffffffff8151cf57>] ? _raw_spin_unlock_irqrestore+0xf/0x11 [ 1351.896018] [<ffffffff810a347b>] ? rcu_process_callbacks+0xb7/0x4b8 [ 1351.896018] [<ffffffff810408f2>] ? perf_trace_softirq+0x38/0x96 [ 1351.896018] [<ffffffff81040f76>] ? __do_softirq+0x102/0x208 [ 1351.896018] [<ffffffff810410f5>] ? irq_exit+0x45/0xa1 [ 1351.896018] [<ffffffff81525fd4>] ? smp_trace_apic_timer_interrupt+0x83/0x91 [ 1351.896018] [<ffffffff810c7c58>] ? perf_event_task_output+0x117/0x117 [ 1351.896018] [<ffffffff81524f3a>] ? trace_apic_timer_interrupt+0x6a/0x70 [ 1351.896018] <EOI> [<ffffffff8108c2b6>] ? smp_call_function_single+0x8c/0x101 [ 1351.896018] [<ffffffff810a8d2e>] ? ftrace_ops_control_func+0x9a/0xc8 [ 1351.896018] [<ffffffff810c7cd3>] ? task_function_call+0x42/0x4c [ 1351.896018] [<ffffffff810c77f1>] ? __perf_event_task_sched_in+0x108/0x108 [ 1351.896018] [<ffffffff810c81cb>] ? perf_event_enable+0xf7/0x12e [ 1351.896018] [<ffffffff810c5a4a>] ? perf_event_task_enable+0x57/0x6c [ 1351.896018] [<ffffffff8151bfea>] ? _cond_resched+0x9/0x37 [ 1351.896018] [<ffffffff8151a511>] ? mutex_lock+0x16/0x37 [ 1351.896018] [<ffffffff810c80d4>] ? perf_install_in_context+0xb8/0xb8 [ 1351.896018] [<ffffffff810c5955>] ? perf_event_for_each_child+0x56/0x88 [ 1351.896018] [<ffffffff810c5a4a>] ? perf_event_task_enable+0x57/0x6c [ 1351.896018] [<ffffffff810c5a32>] ? perf_event_task_enable+0x3f/0x6c [ 1351.896018] [<ffffffff8104eb20>] ? SyS_prctl+0x151/0x341 [ 1351.896018] [<ffffffff8100cefe>] ? syscall_trace_leave+0x52/0xba [ 1351.896018] [<ffffffff815243c1>] ? tracesys+0xd4/0xd9 [ 1351.896018] ---[ end trace dea2e0afc6629577 ]--- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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