linux-kernel - Re: [Bugme-new] [Bug 11543] New: kernel panic: softlockup in tick

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Message-ID: <alpine.LFD.1.10.0809160711360.3606@apollo.tec.linutronix.de>
Date:	Tue, 16 Sep 2008 07:14:40 -0700 (PDT)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Joshua Hoblitt <josh@...litt.com>
cc:	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, bugme-daemon@...zilla.kernel.org,
	j_kernel@...litt.com
Subject: Re: [Bugme-new] [Bug 11543] New: kernel panic: softlockup in
 tick_periodic() ???

On Mon, 15 Sep 2008, Joshua Hoblitt wrote:

> In addition to the deadlocks, we still have the watchdog warning:
> 
> [    0.460034] Testing NMI watchdog ... 
> [    0.532557] WARNING: CPU#0: NMI appears to be stuck (0->0)!
> [    0.533301] Please report this to bugzilla.kernel.org,
> [    0.536635] and attach the output of the 'dmesg' command.
> 
> Perhaps an HPET problem:
> 
> [    0.993800] hpet0: at MMIO 0xfed00000, IRQs 2, 8, 31
> [    0.999969] hpet0: 3 32-bit timers, 25000000 Hz
> [    1.004396] ACPI: RTC can wake from S4
> [    1.006637] Clockevents: could not switch to one-shot
> mode:<6>Clockevents: could not switch to one-shot mode: lapic is not functional.
> [    1.009844] Could not switch to high resolution mode on CPU 3
> [    1.009848] Clockevents: could not switch to one-shot mode: lapic is not functional.
> [    1.009852] Could not switch to high resolution mode on CPU 2
> [    1.009855] Clockevents: could not switch to one-shot mode: lapic is not functional.
> [    1.009858] Could not switch to high resolution mode on CPU 1
> [    1.009969]  lapic is not functional.
> [    1.056944] Could not switch to high resolution mode on CPU 0

No, that's documented behaviour:

> > > [    0.126660] APIC timer registered as dummy, due to nmi_watchdog=1!

Can you try nmi_watchdog=2 ?

Thanks,

	tglx
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