linux-kernel - Re: [PATCH v5 10/12] x86/mtrr/main.c: Ask the first online CPU to save mtrr

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Message-ID: <CAMzpN2hfCCarbn+CDGrQuUaXYT29HpRd+9n0EKWvZdgLdqdAhA@mail.gmail.com>
Date:	Thu, 12 Jan 2012 07:33:01 -0500
From:	Brian Gerst <brgerst@...il.com>
To:	Fenghua Yu <fenghua.yu@...el.com>
Cc:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	H Peter Anvin <hpa@...or.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Asit K Mallick <asit.k.mallick@...el.com>,
	Tony Luck <tony.luck@...el.com>,
	Arjan van de Ven <arjan.van.de.ven@...el.com>,
	Suresh B Siddha <suresh.b.siddha@...el.com>,
	Len Brown <len.brown@...el.com>,
	Randy Dunlap <rdunlap@...otime.net>,
	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Chen Gong <gong.chen@...ux.intel.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-pm <linux-pm@...r.kernel.org>, x86 <x86@...nel.org>
Subject: Re: [PATCH v5 10/12] x86/mtrr/main.c: Ask the first online CPU to
 save mtrr

On Wed, Jan 11, 2012 at 12:04 PM, Fenghua Yu <fenghua.yu@...el.com> wrote:
> From: Fenghua Yu <fenghua.yu@...el.com>
>
> Ask the first online CPU to save mtrr instead of asking BSP. BSP could be
> offline when mtrr_save_state() is called.

If you can use any non-boot cpu to save the MTRRs why not just use the
current cpu?  They should all be in sync anyways.

--
Brian Gerst
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