linux-kernel - Re: [PATCH v1 2/2] x86, apic: Disable BSP if boot cpu is AP

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Message-ID: <5085E663.6040307@zytor.com>
Date:	Mon, 22 Oct 2012 17:35:47 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
CC:	HATAYAMA Daisuke <d.hatayama@...fujitsu.com>,
	linux-kernel@...r.kernel.org, kexec@...ts.infradead.org,
	x86@...nel.org, mingo@...e.hu, tglx@...utronix.de,
	len.brown@...el.com, fenghua.yu@...el.com, vgoyal@...hat.com,
	grant.likely@...retlab.ca, rob.herring@...xeda.com
Subject: Re: [PATCH v1 2/2] x86, apic: Disable BSP if boot cpu is AP

On 10/22/2012 02:29 PM, Eric W. Biederman wrote:
>>
>> As I said, I thought Fenghua tried that but it didn't work, experimentally.
>
> Fair enough.  You described the problem with clearing bit 8 in a weird
> way.
>
> If the best we can muster are fuzzy memories it may be worth revisiting.
> Perhaps it works on enough cpu models to be interesting.
>

It isn't fuzzy memories... this was done as late as 1-2 months ago.  I 
just don't know the details.

Fenghua, could you help fill us in?

	-hpa


-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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