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Date: Mon, 01 Feb 2010 12:36:59 -0800
From: Yinghai Lu <yinghai@kernel.org>
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To: Thomas Renninger <trenn@suse.de>
CC: linux-kernel@vger.kernel.org, jbarnes@virtuousgeek.org,
       akpm@linux-foundation.org, mingo@elte.hu
Subject: Re: IRQ regression messes up xseries 330 SCI resulting in apic=off
 - bisected to commit b9c61b70075c87a861262473
References: <201002011559.07869.trenn@suse.de>
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On 02/01/2010 06:59 AM, Thomas Renninger wrote:
> Hi,
> 
> booting a latest kernel on this machine results in:
> 
> PCI: PCI BIOS revision 2.10 entry at 0xfd61c, last bus=1
> PCI: Using configuration type 1 for base access bio: create slab <bio-0> at 0
> ACPI: SCI (IRQ30) allocation failed
> ACPI Exception: AE_NOT_ACQUIRED, Unable to install System Control Interrupt handler (20090903/evevent-161)
> ACPI: Unable to start the ACPI Interpreter
> 
> Later all kind of devices fail...
> 
...
> 
> 
> Attached are dmesg of an umodified broken 2.6.32 kernel and
> dmesg of a 2.6.32 kernel in which I reverted above patch (apic=verbose).
> The reverting needed some adjusting and I did this without understanding
> the code. I also attach the backported patch reverting above for 2.6.32
> which makes the machine work again (see dmesg attachment).
> This probably cannot go in, it would be great if someone could help
> finding a proper patch for mainline which makes the machine work again.
> (The ACPI irq, SCI, is meant to be on IRQ 30, rerouted from IRQ 3 via
> APIC source override table, which is rather odd/uncommon. Hope that helps)

ok, the root cause the SCI in on second ioapic....

will have a patch for it.

Thanks

Yinghai
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