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Date:      Fri, 30 Jan 2004 13:11:19 -0500
From:      John Baldwin <jhb@FreeBSD.org>
To:        Sangwoo Shim <ssw@neo.redjade.org>
Cc:        current@freebsd.org
Subject:   Re: Interrupt storm on acpi0 occurred after madt.c change
Message-ID:  <200401301311.19251.jhb@FreeBSD.org>
In-Reply-To: <20040130164001.GA49968@neo.redjade.org>
References:  <20040130164001.GA49968@neo.redjade.org>

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On Friday 30 January 2004 11:40 am, Sangwoo Shim wrote:
> Hi.
> I've experienced interrupt storm on acpi0 after your v1.10 madt.c commit.
> (which is located at src/sys/i386/acpica/madt.c);
> What really makes me frustrating is this storm wasn't here before 1.10
> change, which is exactly stand against your commit log message. :-(
> I've recompiled kernel with v1.9 of madt.c and the problem didn't occur.
>
> I'm using ASUS P2B-D with two p3-650 processors.
> BIOS version is 1014 beta 3 (which is the last published one);
>
> My kernel config is stripped GENERIC, which includes
> option	CPU_FASTER_5X86_FPU
> option	CPU_ENABLE_SSE
> device	acpi		# Mine hangs with acpi loaded as module.
>
> Attached file is my acpidump -t -d output.
> Thanks.

Can you provide a dmesg?  IRQ20 on your box is a PCI interrupt and PCI 
interrupts are level/lo, not level/hi.  To top it off, ACPI states that the 
SCI is supposed to always be level/lo.  You must have a very broken BIOS to 
get a storm now.

-- 
John Baldwin <jhb@FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org



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