linux-kernel - Re: Bisected regression (Was Re: current -git fails to boot on nehalem-ex)

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Message-ID: <4B2179FC.6090305@kernel.org>
Date:	Thu, 10 Dec 2009 14:45:16 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	"H. Peter Anvin" <hpa@...or.com>
CC:	Jens Axboe <jens.axboe@...cle.com>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Randy Dunlap <randy.dunlap@...cle.com>
Subject: Re: Bisected regression (Was Re: current -git fails to boot on	nehalem-ex)

H. Peter Anvin wrote:
> On 12/10/2009 01:07 PM, Yinghai Lu wrote:
>> it turns out BIOS is using first 64k for mptable without reserve it.
>>
>> so try to find good range for it instead of hard code it.
>> in case some bios try to use that range for sth.
>>
> 
> Is this an EFI BIOS?  Otherwise, the first 64K would be clobbered anyway
> by the boot loader, so it is invalid anyway...  If it is EFI, it is
> theoretically possible.

Jens said acpi=off works with 2.6.32.

can you specify the exact byte position that boot loader could touched?

YH
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