Message-ID: <4B2179FC.6090305@kernel.org>
Date: Thu, 10 Dec 2009 14:45:16 -0800
From: Yinghai Lu <yinghai@kernel.org>
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To: "H. Peter Anvin" <hpa@zytor.com>
CC: Jens Axboe <jens.axboe@oracle.com>, Ingo Molnar <mingo@elte.hu>,
       Thomas Gleixner <tglx@linutronix.de>,
       "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
       Randy Dunlap <randy.dunlap@oracle.com>
Subject: Re: Bisected regression (Was Re: current -git fails to boot on	nehalem-ex)
References: <20091210091040.GG8742@kernel.dk> <20091210103945.GI8742@kernel.dk> <20091210160640.GB27794@elte.hu> <67EA4830-231F-45C9-A1A6-CE1C6CD9493D@kernel.org> <20091210180727.GK8742@kernel.dk> <4B213F1F.2020305@kernel.org> <4B2140F8.3020201@kernel.org> <20091210184506.GP8742@kernel.dk> <20091210190742.GS8742@kernel.dk> <4B2149B4.9060900@kernel.org> <20091210192659.GV8742@kernel.dk> <4B21630A.6000308@kernel.org> <4B21789F.4030707@zytor.com>
In-Reply-To: <4B21789F.4030707@zytor.com>
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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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