linux-kernel - Re: Q: smp.c && barriers (Was: [PATCH 1/4] generic-smp: remove single ipi fallback for smp_call_function

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Message-ID: <alpine.LFD.2.00.0902180915430.21686@localhost.localdomain>
Date:	Wed, 18 Feb 2009 09:17:44 -0800 (PST)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Ingo Molnar <mingo@...e.hu>
cc:	Suresh Siddha <suresh.b.siddha@...el.com>,
	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>,
	Yinghai Lu <yinghai@...nel.org>, Nick Piggin <npiggin@...e.de>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Oleg Nesterov <oleg@...hat.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Jens Axboe <jens.axboe@...cle.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Steven Rostedt <rostedt@...dmis.org>,
	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org
Subject: Re: Q: smp.c && barriers (Was: [PATCH 1/4] generic-smp: remove single
 ipi fallback for smp_call_function_many())



On Wed, 18 Feb 2009, Ingo Molnar wrote:
> 
> ok, it's documented:
> 
>    Intel® 64 and IA-32 Architectures
>    Software Developer’s Manual
>                            Volume 3A:
>        System Programming Guide, Part 1
> 
>  9.5.3        MSR Access in x2APIC Mode

Well, mine says

	9.5.3 Error Handling

so I guess I need to download a newer version. After all, mine is 
"ancient" in being a year old (the February-2008 version) and not covering 
x2APIC at all.

			Linus
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