linux-kernel - Re: kernel 3.10-rc1 p-state/cpuidle panic

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Message-ID: <CAGA4a+FExrde7ceDZRMWCxe7YgQ5EmYBJ1gmapuYOF2CrJHuRw@mail.gmail.com>
Date:	Mon, 20 May 2013 12:02:53 +0200
From:	Tommy Apel <tommyapeldk@...il.com>
To:	Borislav Petkov <bp@...en8.de>
Cc:	Dirk Brandewie <dirk.j.brandewie@...el.com>,
	linux-kernel@...r.kernel.org
Subject: Re: kernel 3.10-rc1 p-state/cpuidle panic

I think it's worth mentioning that this happens on a dual cpu system,
I'm running the exact same kernel on a Xeon E3
and has not had this problem.

I also changed back to the regular dyntick and after that the dual cpu
system has been stabil.

/Tommy

On May 20, 2013 7:08 AM, "Borislav Petkov" <bp@...en8.de> wrote:
>
> Hmm,
>
> divide by 0, it seems.
>
> + Dirk Brandewie.
>
> On Sun, May 19, 2013 at 01:25:41PM +0200, Tommy Apel Hansen wrote:
> > Hello guys, I'm getting this with the current 3.10-rc1, I've enabled the new full-NOHZ
> > I'm not sure though if that has something to do with this or if something is changed in the
> > p-state code.
> >
> > System :
> > vendor_id : GenuineIntel
> > cpu family  : 6
> > model   : 45
> > model name  : Intel(R) Xeon(R) CPU E5-2609 0 @ 2.40GHz
> > stepping  : 7
> > microcode : 0x70b
> > cpu MHz   : 1176.000
> > cache size  : 10240 KB
> > physical id : 1
> > siblings  : 4
> > core id   : 3
> > cpu cores : 4
> > apicid    : 38
> > initial apicid : 38
> > fpu   : yes
> > fpu_exception : yes
> > cpuid level : 13
> > wp    : yes
> > flags   : [lots of stuff]
> > bogomips  : 4800.56
> > clflush size  : 64
> > cache_alignment : 64
> > address sizes : 46 bits physical, 48 bits virtual
> > power management:
> >
> > crash bt:
> > PID: 0      TASK: ffff88085c585950  CPU: 5   COMMAND: "swapper/5"
> >  #0 [ffff88107fc83b80] machine_kexec at ffffffff8102aad6
> >  #1 [ffff88107fc83bc0] crash_kexec at ffffffff810e57d0
> >  #2 [ffff88107fc83c90] oops_end at ffffffff810073b8
> >  #3 [ffff88107fc83cb0] do_divide_error at ffffffff810040c2
> >  #4 [ffff88107fc83d50] divide_error at ffffffff81637348
> >     [exception RIP: intel_pstate_timer_func+1071]
> >     RIP: ffffffff814f501f  RSP: ffff88107fc83e08  RFLAGS: 00010246
> >     RAX: 0000000000000000  RBX: ffff8808555b9e00  RCX: ffff8808555b9e40
> >     RDX: 0000000000000000  RSI: 0000000000000064  RDI: 0000000000000001
> >     RBP: 0000025debb95955   R8: ffff8808555b9f70   R9: 00000000000003e0
> >     R10: dead000000200200  R11: 0000000000000000  R12: 0000001877f8d1d3
> >     R13: 000000009a45ae19  R14: 0000001d27d3d1d8  R15: 0000000000000040
> >     ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
> >  #5 [ffff88107fc83e00] intel_pstate_timer_func at ffffffff814f4fa2
> >  #6 [ffff88107fc83e60] call_timer_fn at ffffffff8109edc3
> >  #7 [ffff88107fc83e90] run_timer_softirq at ffffffff810a097e
> >  #8 [ffff88107fc83f10] __do_softirq at ffffffff810990f1
> >  #9 [ffff88107fc83f80] irq_exit at ffffffff810993ce
> > #10 [ffff88107fc83f90] smp_apic_timer_interrupt at ffffffff81026448
> > #11 [ffff88107fc83fb0] apic_timer_interrupt at ffffffff81636eca
> > --- <IRQ stack> ---
> > #12 [ffff88085c587db8] apic_timer_interrupt at ffffffff81636eca
> >     [exception RIP: cpuidle_enter_state+72]
> >     RIP: ffffffff814f5978  RSP: ffff88085c587e68  RFLAGS: 00000216
> >     RAX: 000000000001c61d  RBX: ffffffff810a11e8  RCX: 0000000000000018
> >     RDX: 0000000225c17d03  RSI: ffff88085c587fd8  RDI: ffffffff81a12500
> >     RBP: 0000000000000002   R8: 0000000000000030   R9: 0000000000000001
> >     R10: 0000000000000000  R11: 0000000000000000  R12: ffffffff810c48dd
> >     R13: ffff88085c173950  R14: 0000000000000086  R15: 0000000000000000
> >     ORIG_RAX: ffffffffffffff10  CS: 0010  SS: 0018
> > #13 [ffff88085c587eb0] cpuidle_idle_call at ffffffff814f5aca
> > #14 [ffff88085c587ef0] arch_cpu_idle at ffffffff8100cef9
> > #15 [ffff88085c587f00] cpu_startup_entry at ffffffff810ce5af
> >
> > kernel config:
> > http://pastebin.com/AmEqQNZx
> >
> > /Tommy
> >
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
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> > Please read the FAQ at  http://www.tux.org/lkml/
> >
>
> --
> Regards/Gruss,
>     Boris.
>
> Sent from a fat crate under my desk. Formatting is fine.
> --
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