linux-kernel - Re: PROBLEM: Can't boot a (HZ = 1000) kernel using an AMD Phenom-II processor

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Date:	Tue, 03 Feb 2009 14:15:13 -0500
From:	Mark Hounschell <markh@...pro.net>
To:	Borislav Petkov <borislav.petkov@....com>
CC:	Mark Hounschell <dmarkh@....rr.com>,
	Andreas Herrmann <andreas.herrmann3@....com>,
	john stultz <johnstul@...ibm.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: PROBLEM: Can't boot a (HZ = 1000) kernel using an AMD	Phenom-II
 processor

Borislav Petkov wrote:
> Hi,
> 
> On Tue, Feb 03, 2009 at 04:17:55AM -0500, Mark Hounschell wrote:
>> Borislav Petkov wrote:
>>> On Sat, Jan 31, 2009 at 04:15:58AM -0500, Mark Hounschell wrote:
>>>
>>> [..]
>>>
>>>> So were you able to reproduce this with my .config. Has anyone booted a Hz=1000
>>>> kernel on an AMD Phenom-II? Is there something wrong with my .config? Is there
>>>> anything else I can do?
>>> Hi,
>>>
>>> sorry for the delay - I've been busy last week and couldn't get to your
>>> problem. So, I couldn't reproduce the bug here with a Phenom II and your
>>> kernel config. However, we have a working theory, so can you please send
>>> me the output of
>>>
>>> xxd /sys/firmware/acpi/tables/APIC
>>>
>> markh@...ley:~> xxd /sys/firmware/acpi/tables/APIC
>> 0000000: 4150 4943 8400 0000 014c 5258 3738 3020  APIC.....LRX780
>> 0000010: 4157 5244 4143 5049 312e 3042 4157 5244  AWRDACPI1.0BAWRD
>> 0000020: 0000 0000 0000 e0fe 0100 0000 0008 0000  ................
>> 0000030: 0100 0000 0008 0101 0100 0000 0008 0202  ................
>> 0000040: 0100 0000 0008 0303 0100 0000 010c 0400  ................
>> 0000050: 0000 c0fe 0000 0000 020a 0000 0200 0000  ................
>> 0000060: 0000 020a 0009 0900 0000 0f00 0406 0005  ................
>> 0000070: 0001 0406 0105 0001 0406 0205 0001 0406  ................
>> 0000080: 0305 0001
> 
> looks good at a glance...
> 
>>> Also, can you boot a 64-bit, HZ1000 kernel on your machine?
>>>
>> No, a 64 bit kernel @1000Hz doesn't boot either. As with the 32 bit kernel,
>> setting Hz to 250 allows it to boot. The messages are slightly different when it
>> hangs on the 64bit kernel at 1000Hz.
> 
> That's not cool - as I said before, I can't reproduce this behavior here
> which means that the problem might be chipset-related. What you could do
> now is to boot the kernel with "debug initcall_debug log_buf_len=10M"
> and try to capture the whole boot log with a serial console - or if that
> doesn't work - make a screenshot with a camera of some sort. This might
> shed some light on the question where exactly your machine hangs.
> 

It will be easier to capture the process on video then rip it out into a
bunch jpegs than it will be to connect the serial port. It's internal and I
don't have the adapter to bring it out the back of the case. I'll see what
I can do. It might be a couple of days but I'll get back to ya.


Thanks
Mark
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