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Date: Fri, 5 Sep 2008 18:04:14 +0200
From: Ingo Molnar <mingo@elte.hu>
To: "Maciej W. Rozycki" <macro@linux-mips.org>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>, "hpa@zytor.com" <hpa@zytor.com>,
       "tglx@linutronix.de" <tglx@linutronix.de>,
       "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
       Yinghai Lu <yhlu.kernel@gmail.com>
Subject: Re: [patch 1/2] x2apic: fix reserved APIC register accesses in
	print_local_APIC()
Message-ID: <20080905160414.GL10292@elte.hu>
References: <20080902234759.554038000@linux-os.sc.intel.com> <Pine.LNX.4.55.0809030625520.23174@cliff.in.clinika.pl> <20080903184552.GE14481@linux-os.sc.intel.com> <Pine.LNX.4.55.0809032145020.23174@cliff.in.clinika.pl>
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* Maciej W. Rozycki <macro@linux-mips.org> wrote:

> On Wed, 3 Sep 2008, Suresh Siddha wrote:
> 
> > from SDV Vol 3a Section 17.27.1
> > 
> >   The remote read delivery mode provided in the 82489DX and local APIC for
> >   Pentium processors is not supported in the local APIC in the Pentium 4, Intel
> >   Xeon, and P6 family processors.
> > 
> > It looks like it is not supported (officially atleast) even in APIC bus
> > architectures. Only the Pentium integrated APIC seems to be the exception.
> 
>  Yeah, trust documentation and see where you'll get... ;)

hm, is the remote read debug output, now that it's not present in CPUs 
made in the past 5 years or so, really that important?

	Ingo