linux-kernel - Re: v2.6.26-rc9: ACPI PCI irq routing on NUMA? + early

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Date:	Thu, 17 Jul 2008 22:58:56 +0200
From:	"Vegard Nossum" <vegard.nossum@...il.com>
To:	"Bjorn Helgaas" <bjorn.helgaas@...com>
Cc:	"Ingo Molnar" <mingo@...e.hu>,
	"Alexey Starikovskiy" <astarikovskiy@...e.de>,
	"Thomas Gleixner" <tglx@...utronix.de>,
	venkatesh.pallipadi@...el.com, "Huang Ying" <ying.huang@...el.com>,
	"Andi Kleen" <andi@...stfloor.org>, linux-kernel@...r.kernel.org,
	linux-acpi@...r.kernel.org
Subject: Re: v2.6.26-rc9: ACPI PCI irq routing on NUMA? + early_ioremap trouble

On Thu, Jul 17, 2008 at 8:45 PM, Bjorn Helgaas <bjorn.helgaas@...com> wrote:
> On Sunday 06 July 2008 07:47:19 am Vegard Nossum wrote:
>> I have produced a config which doesn't boot correctly on either of my
>> computers with v2.6.26-rc9.
>>
>> The first problem is with my laptop, which hangs on boot, see
>> screenshot (sorry for the bad quality, I was in a hurry):
>> http://folk.uio.no/vegardno/linux/DSCF3026.JPG
>>
>> I figured there's something wrong with ACPI PCI irq routing as I'm
>> missing a message that shows up in my usual configs:
>>
>> calling  ide_scan_pcibus+0x0/0xf0
>> ICH8M: IDE controller (0x8086:0x2850 rev 0x03) at  PCI slot 0000:00:1f.1
>>     --- HERE: ---
>> ACPI: PCI Interrupt 0000:00:1f.1[A] -> GSI 18 (level, low) -> IRQ 18
>>     ----
>> ICH8M: not 100% native mode: will probe irqs later
>>
>> ...and as can be seen in the screenshot, ide-cd "lost interrupt".
>> Unfortunately, I don't have a serial line on this machine, so it's
>> hard to get the full log. (Maybe I can try netconsole, it seems to be
>> up by the time this happens.)
>
> If you could get netconsole working and collect the complete
> console log from both the working config and the broken one,
> that would help a lot.

Hah, I actually managed to get netconsole working. This is the log
that fails (v2.6.26):

http://folk.uio.no/vegardno/linux/numa-netconsole.txt

I think this looks really interesting:

[    0.093562] ExtINT not setup in hardware but reported by MP table
[    0.093854] ENABLING IO-APIC IRQs
[    0.094244] ..TIMER: vector=0x31 apic1=-1 pin1=2 apic2=-1 pin2=0
[    0.094985] ..MP-BIOS bug: 8254 timer not connected to IO-APIC
[    0.094985] ...trying to set up timer (IRQ0) through the 8259A ...
[    0.094985] ..... (found pin 0) ...<7>APIC error on CPU0: 00(80)
[    0.094985]  failed.
[    0.094985] ...trying to set up timer as Virtual Wire IRQ...<7>APIC
error on CPU0: 80(80)
[    0.105761]  works.

This error would be:
           7: Illegal register address

Looks like APIC was misconfigured, which might explain IRQ routing weirdness?

Will try to provide the booting one later. Now zZz...


Vegard

-- 
"The animistic metaphor of the bug that maliciously sneaked in while
the programmer was not looking is intellectually dishonest as it
disguises that the error is the programmer's own creation."
	-- E. W. Dijkstra, EWD1036
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