linux-kernel - Re: [REGRESSION from 2.6.23-rc8]

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Message-ID: <46FD18A5.9020907@redhat.com>
Date:	Fri, 28 Sep 2007 11:07:17 -0400
From:	Chuck Ebbert <cebbert@...hat.com>
To:	Thomas Gleixner <tglx@...utronix.de>
CC:	Linus Torvalds <torvalds@...ux-foundation.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>, Andi Kleen <ak@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>
Subject: Re: [REGRESSION from 2.6.23-rc8]

On 09/26/2007 06:35 PM, Thomas Gleixner wrote:
> It's even worse than I thought on the first check:
> 
> "noapictimer" on the command line of an SMP box prevents _ONLY_ the boot
> CPU apic timer from being used. But the secondary CPU is still
> unconditionally setting up the APIC timer and uses the non calibrated
> variable calibration_result, which is of course 0, to setup the APIC
> timer. Wreckage guaranteed.
> 

Is this why I get 1000 spurious interrupts/second on IRQ7 when booting
x86_64 with "noapic"?
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