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    Subject[perf] 3.0 overflow test locks up system
    Hello

    With 3.0.0 the PAPI "overflow_allcounters" test reliably locks up my
    Nehalem system. This definitely does not happen in 2.6.39 and possibly
    doesn't in 3.0-rc4 either.

    I won't have time to bisect or to come up with a simpler test case until
    next week sometime.

    A warning is printed just before the machine becomes unresponsive, it is
    included below.

    Thanks,

    Vince
    vweaver1@eecs.utk.edu

    [ 392.504845] ------------[ cut here ]------------
    [ 392.504962] WARNING: at kernel/smp.c:320 smp_call_function_single+0x6c/0xf2()
    [ 392.505074] Hardware name: Precision M4500
    [ 392.505181] Modules linked in: acpi_cpufreq cpufreq_conservative mperf cpufreq_powersave cpufreq_userspace cpufreq_stats uinput nouveau snd_hda_codec_hdmi ttm drm_kms_helper mxm_wmi snd_hda_codec_idt iwlagn mac80211 snd_hda_intel snd_hda_codec cfg80211 dell_laptop snd_hwdep video processor ehci_hcd dell_wmi sparse_keymap psmouse sdhci_pci rfkill snd_pcm sdhci thermal_sys pcspkr ac battery wmi serio_raw snd_timer snd_page_alloc evdev i2c_i801 dcdbas button
    [ 392.509709] Pid: 2310, comm: overflow_allcou Not tainted 3.0.0 #43
    [ 392.509819] Call Trace:
    [ 392.509925] <IRQ> [<ffffffff81041bb0>] ? warn_slowpath_common+0x78/0x8c
    [ 392.510144] [<ffffffff810a4d19>] ? perf_exclude_event.part.23+0x31/0x31
    [ 392.510257] [<ffffffff8106b7c5>] ? smp_call_function_single+0x6c/0xf2
    [ 392.510369] [<ffffffff810a38aa>] ? task_function_call+0x42/0x4c
    [ 392.510476] [<ffffffff810a50e4>] ? update_cgrp_time_from_event+0x2c/0x2c
    [ 392.510589] [<ffffffff810a5a9d>] ? perf_event_disable+0x45/0x8c
    [ 392.510700] [<ffffffff810a8e89>] ? __perf_event_overflow+0xf1/0x1a3
    [ 392.510812] [<ffffffff8103c7bb>] ? select_task_rq_fair+0x349/0x574
    [ 392.510924] [<ffffffff810a7f0a>] ? perf_ctx_adjust_freq+0x42/0xe6
    [ 392.511038] [<ffffffff8105f152>] ? sched_clock_cpu+0xb/0xc3
    [ 392.511152] [<ffffffff8100ded5>] ? paravirt_read_tsc+0x5/0x8
    [ 392.511262] [<ffffffff8100e320>] ? native_sched_clock+0x27/0x2f
    [ 392.511366] [<ffffffff810a9500>] ? perf_event_overflow+0x10/0x10
    [ 392.511476] [<ffffffff810a959f>] ? perf_swevent_hrtimer+0x9f/0xda
    [ 392.511599] [<ffffffff8105ca04>] ? run_posix_cpu_timers+0x23/0x346
    [ 392.511721] [<ffffffff8131c2ef>] ? rb_insert_color+0xb1/0xd9
    [ 392.511841] [<ffffffff8105d373>] ? __run_hrtimer+0xac/0x135
    [ 392.511960] [<ffffffff8105daa3>] ? hrtimer_interrupt+0xdb/0x195
    [ 392.512083] [<ffffffff8108d040>] ? check_for_new_grace_period.isra.32+0x99/0xa4
    [ 392.512220] [<ffffffff8108d201>] ? __rcu_process_callbacks+0x72/0x2b7
    [ 392.512345] [<ffffffff8102437c>] ? hpet_interrupt_handler+0x23/0x2b
    [ 392.512469] [<ffffffff81089446>] ? handle_irq_event_percpu+0x50/0x180
    [ 392.512592] [<ffffffff81046f76>] ? __do_softirq+0x13e/0x177
    [ 392.512713] [<ffffffff810f680c>] ? send_sigio+0x95/0xab
    [ 392.512832] [<ffffffff810895aa>] ? handle_irq_event+0x34/0x52
    [ 392.512952] [<ffffffff8108b433>] ? handle_edge_irq+0x9f/0xc6
    [ 392.513072] [<ffffffff8100a831>] ? handle_irq+0x1d/0x21
    [ 392.513192] [<ffffffff8100a561>] ? do_IRQ+0x42/0x98
    [ 392.513314] [<ffffffff81593053>] ? common_interrupt+0x13/0x13
    [ 392.513438] <EOI>
    [ 392.513542] ---[ end trace 12f3f913316a2866 ]---


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