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Subject: Re: 2.6.21-git4 BUG: soft lockup detected on CPU#1!
From: Thomas Gleixner <tglx@linutronix.de>
Reply-To: tglx@linutronix.de
To: Michal Piotrowski <michal.k.k.piotrowski@gmail.com>
Cc: LKML <linux-kernel@vger.kernel.org>
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Date: Wed, 02 May 2007 23:49:16 +0200
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On Wed, 2007-05-02 at 23:42 +0200, Michal Piotrowski wrote:
> Hi Thomas,
> 
> I hit this soft lockup
> 
> [ 5401.599275] BUG: soft lockup detected on CPU#1!
> [ 5401.603809]  [<c0105039>] show_trace_log_lvl+0x1a/0x2f
> [ 5401.608980]  [<c0105720>] show_trace+0x12/0x14
> [ 5401.613456]  [<c01057d2>] dump_stack+0x16/0x18
> [ 5401.617934]  [<c01518e8>] softlockup_tick+0xa7/0xb9
> [ 5401.622841]  [<c012a0b5>] run_local_timers+0x12/0x14
> [ 5401.627829]  [<c012a482>] update_process_times+0x3e/0x63
> [ 5401.633164]  [<c013a028>] tick_sched_timer+0x5d/0xa1
> [ 5401.638160]  [<c01366fb>] hrtimer_interrupt+0x127/0x1b4
> [ 5401.643415]  [<c0114c66>] smp_apic_timer_interrupt+0x72/0x84
> [ 5401.649097]  [<c0104b2b>] apic_timer_interrupt+0x33/0x38
> [ 5401.654437]  =======================
> [ 5401.658055] Clocksource tsc unstable (delta = 9372000804 ns)
> [ 5401.664061] Time: acpi_pm clocksource has been installed.

Hmm. Looks like TSC going awry and the softlockup hits before the tsc
watchdog logic kicks in.

Was the system stable afterwards ?

	tglx


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