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

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Message-ID: <CAE9FiQXk7y_oafNZG-QF5h3kDUQ3J6SP3A=ezHBT2W4Njo=uxQ@mail.gmail.com>
Date:	Sun, 11 Dec 2011 13:43:58 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Ingo Molnar <mingo@...e.hu>, "Berck E. Nash" <flyboy@...il.com>
Cc:	"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 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* ...

Sure.

Attached -v4 should automatically switch to xapic mode.

Berck,
Can you please try -v4 patch on your setup when BIOS have x2apic enabled?

Thanks

Yinghai Lu

View attachment "nox2apic_v4.patch" of type "text/x-patch" (10202 bytes)