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

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Message-ID: <20130520121356.GE12690@pd.tnic>
Date:	Mon, 20 May 2013 14:13:56 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Tommy Apel <tommyapeldk@...il.com>
Cc:	Dirk Brandewie <dirk.j.brandewie@...el.com>,
	linux-kernel@...r.kernel.org,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: kernel 3.10-rc1 p-state/cpuidle panic

On Mon, May 20, 2013 at 12:02:53PM +0200, Tommy Apel wrote:
> 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.

True story - NO_HZ_FULL=y. Although I can't see the connection between
the issue and NO_HZ_FULL.

Adding Frederic and leaving in the rest for reference.

> 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
> > > 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/
> > >
> >
> > --
> > Regards/Gruss,
> >     Boris.
> >
> > Sent from a fat crate under my desk. Formatting is fine.
> > --
> 

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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