linux-kernel - Re: Latest tip kernel(3.2-rc1-tip_cf6b3899) fails to boot on x3850x5 machine

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Date:	Wed, 14 Dec 2011 21:17:54 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Nikunj A Dadhania <nikunj@...ux.vnet.ibm.com>
cc:	Ingo Molnar <mingo@...e.hu>, LKML <linux-kernel@...r.kernel.org>,
	x86@...nel.org
Subject: Re: Latest tip kernel(3.2-rc1-tip_cf6b3899) fails to boot on x3850x5
 machine

On Wed, 14 Dec 2011, Thomas Gleixner wrote:

> On Wed, 14 Dec 2011, Nikunj A Dadhania wrote:
> 
> > Hi,
> > 
> > I was trying the latest tip kernel and I am seeing the following
> > message. After some more logs the machine does not proceed.
> > 
> > ------------[ cut here ]------------
> > WARNING: at kernel/time/clockevents.c:47 clockevent_delta2ns+0x79/0x90()
> 
> Ok, that's caused by stupidity in the apic timer code. Fix
> below. Note, that patch wont fix the boot problem. It just prevents
> the warning.
> 
> > Hardware name: System x3850 X5 -[71455RQ]-
> > Modules linked in:
> > Pid: 1, comm: swapper/0 Not tainted 3.2.0-rc4-tip #3
> > Call Trace:
> >  [<ffffffff8104d3af>] warn_slowpath_common+0x7f/0xc0
> >  [<ffffffff8104d40a>] warn_slowpath_null+0x1a/0x20
> >  [<ffffffff81097ab9>] clockevent_delta2ns+0x79/0x90
> >  [<ffffffff81e49109>] calibrate_APIC_clock+0x16e/0x377
> >  [<ffffffff81e4942c>] setup_boot_APIC_clock+0x59/0x7e
> >  [<ffffffff81e472d1>] native_smp_prepare_cpus+0x1f1/0x205
> >  [<ffffffff81e38767>] kernel_init+0x1b6/0x29a
> >  [<ffffffff815f9ca4>] kernel_thread_helper+0x4/0x10
> >  [<ffffffff81e385b1>] ? parse_early_options+0x20/0x20
> >  [<ffffffff815f9ca0>] ? gs_change+0x13/0x13
> > ---[ end trace a7919e7f17c0a725 ]---
> > APIC frequency too slow, disabling apic timer
> 
> Ouch. This is really bad.
> 
> > Performance Events: PEBS fmt1+, Nehalem events, Intel PMU driver.
> > CPU erratum AAJ80 worked around
> > CPUID marked event: 'bus cycles' unavailable
> > ... version:                3
> > ... bit width:              48
> > ... generic registers:      4
> > ... value mask:             0000ffffffffffff
> > ... max period:             000000007fffffff
> > ... fixed-purpose events:   3
> > ... event mask:             000000070000000f
> > NMI watchdog enabled, takes one hw-pmu counter.
> > Booting Node   0, Processors  #1
> > APIC never delivered???
> > APIC delivery error (ef).
> >  #2

What's worse is that this problem exists on 3.2-rc5 as
well. Investigating.

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