linux-kernel - Re: I/O APIC: Timer through 8259A revamp

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Date:	Thu, 23 Apr 2009 10:45:03 -0700 (PDT)
From:	yuhong <yuhongbao_386@...mail.com>
To:	"Maciej W. Rozycki" <macro@...ux-mips.org>
Cc:	"Maciej W. Rozycki" <macro@...ux-mips.org>,
	Andi Kleen <andi@...stfloor.org>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org
Subject: Re: I/O APIC: Timer through 8259A revamp

>  The new burst of breakage came with the invention of ACPI and its tables
> for interrupt routing for the APIC.
Yep, when NVIDIA and ATI entered the chipset market, who would have
predicted that it would cause more 8254 and APIC related troubles? Or
it would be years before it were finally fixed properly? Even worse,
ATI made chipsets before AMD and Intel introduced their 64-bit CPUs,
yet it was the x86-64 architecture where the attempts to fix the ATI
APIC 8254 timer issues were going to. Only later when it was finally
fixed properly was it backported to x86.
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