linux-kernel - Re: [PATCH] x86, therm: Only read the initial value of thermal LVT entry on BSP

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Date:	Sun, 8 Nov 2009 16:42:30 +0300
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Yong Wang <yong.y.wang@...ux.intel.com>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH] x86, therm: Only read the initial value of thermal LVT
	entry on BSP

[Ingo Molnar - Sun, Nov 08, 2009 at 02:16:55PM +0100]
| 
...
|
| > > that makes it cleaner, and also it will work if we dont boot on 
| > > cpu==0. (should that ever occur)
| > > 
| > 
| > May I know when will this happen?
| 
| It's not really expected - we factorize the CPU IDs (which are logical) 
| so that the boot CPU is 0. But relying on cpu==0 is the boot cpu is not 
| clean and the resulting code is harder to read.

Perhaps we need some is_bsp_cpu() helper? Though to cover all x86 places
we need some efforts to apply :/

| 
| 	Ingo
| 
	-- Cyrill
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