Re: WARNING: at arch/x86/kernel/cpu/perf_event.c:989

[Markus Trippelsdorf]

On 2012.02.02 at 22:17 +0100, Markus Trippelsdorf wrote:
> The following warning is easily reproducible after todays
> 'perf-urgent-for-mingo' merge by just running "perf top":
> 
> ------------[ cut here ]------------
> WARNING: at arch/x86/kernel/cpu/perf_event.c:989 x86_pmu_start+0xa5/0x100()
> Hardware name: System Product Name
> Pid: 0, comm: swapper/2 Not tainted 3.3.0-rc2-00068-g24b36da-dirty #22
> Call Trace:
>  <IRQ>  [<ffffffff81054ba0>] ? warn_slowpath_common+0x60/0xa0
>  [<ffffffff8103e1a5>] ? x86_pmu_start+0xa5/0x100
>  [<ffffffff8109f062>] ? perf_adjust_freq_unthr_context.part.82+0xe2/0x140
>  [<ffffffff8109f260>] ? perf_event_task_tick+0x1a0/0x280
>  [<ffffffff81078be3>] ? scheduler_tick+0xc3/0x140
>  [<ffffffff810615b5>] ? update_process_times+0x55/0x80
>  [<ffffffff8108904d>] ? tick_sched_timer+0x4d/0xa0
>  [<ffffffff81072d1b>] ? __run_hrtimer.isra.32+0x3b/0xc0
>  [<ffffffff810735e5>] ? hrtimer_interrupt+0xc5/0x1e0
>  [<ffffffff81045de3>] ? smp_apic_timer_interrupt+0x63/0xa0
>  [<ffffffff8147768b>] ? apic_timer_interrupt+0x6b/0x70
>  <EOI>  [<ffffffff81039100>] ? default_idle+0x20/0x40
>  [<ffffffff81039172>] ? amd_e400_idle+0x52/0x100
>  [<ffffffff81030156>] ? cpu_idle+0xb6/0xe0
> ---[ end trace 7dc3992f562261b6 ]---

Most likely caused by e050e3f0a71b :
 perf: Fix broken interrupt rate throttling

CCing Stephane.

-- 
Markus
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