linux-kernel - Re: x2apic boot failure on recent sandy bridge system

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Message-ID: <4EE5291C.1030302@gmail.com>
Date:	Sun, 11 Dec 2011 15:05:16 -0700
From:	"Berck E. Nash" <flyboy@...il.com>
To:	Yinghai Lu <yinghai@...nel.org>
CC:	Ingo Molnar <mingo@...e.hu>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Suresh Siddha <suresh.b.siddha@...el.com>
Subject: Re: x2apic boot failure on recent sandy bridge system

On 12/11/2011 02:43 PM, Yinghai Lu wrote:
> On Sat, Dec 10, 2011 at 11:57 PM, Ingo Molnar <mingo@...e.hu> wrote:
>>
>> What we want is not a nox2apic option but a good fall-back
>> mechanism that is able to boot the system automatically and
>> safely, without the user having to tweak *anything* ...
> 
> Attached -v4 should automatically switch to xapic mode.
> 
> Berck,
> Can you please try -v4 patch on your setup when BIOS have x2apic enabled?

No problem: It does not work as expected.  Log attached.

View attachment "x2apic-enabled.log" of type "text/plain" (63946 bytes)