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

[Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>]

On Wed, 14 Dec 2011 12:35:35 -0800, Yinghai Lu <yinghai@kernel.org> wrote:
> On Wed, Dec 14, 2011 at 12:17 PM, Thomas Gleixner <tglx@linutronix.de> wrote:
> > 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.
> 
> 
> BIOS pre-enabled x2apic, and kernel config does not have x2apic enabled?
make oldconfig somehow skipped this!! I can see my previous kernel config
having this enabled.

Regards
Nikunj