From: Len Brown <lenb@kernel.org>
Organization: Intel Open Source Technology Center
To: Arjan van de Ven <arjan@infradead.org>
Subject: Re: [Dumb question] 100k RTC interrupts/sec on SMP system: why?
Date: Thu, 4 Jan 2007 14:44:45 -0500
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Cc: Paul P Komkoff Jr <i@stingr.net>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
References: <20061109100953.GE2226@stingr.net> <20061110133504.GC18001@stingr.net> <1163166183.3138.707.camel@laptopd505.fenrus.org>
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On Friday 10 November 2006 08:43, Arjan van de Ven wrote:
> On Fri, 2006-11-10 at 16:35 +0300, Paul P Komkoff Jr wrote:
> > Replying to Arjan van de Ven:
> > > Also have you tried acpi=off or the linux firmware test kit (see url in
> > 
> > acpi=off fixed this.
> >   8:          1          0    IO-APIC-edge  rtc
> acpi=on had this
> 
> >  8: 3673166897 3674697116   IO-APIC-level  rtc
> 
> spot the level-vs-edge difference.... your acpi interrupt routing looks
> bust.
> 
> 
> > So I got rid of "interrupt storm" but what I've lost (except poweroff)?
> 
> you can get power off with APM as well.

Servers don't have APM.

It seems this is an additional sighting of this BIOS bug:

http://bugzilla.kernel.org/show_bug.cgi?id=7679

(perhaps you can note that in the bug report)

pnpacpi=off should be a sufficient workaround for now.

thanks,
-Len

ps. there is nothing dumb about this question:-)
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