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Date: Sat, 08 Mar 2008 11:25:47 +0100
From: "H. Peter Anvin" <hpa@zytor.com>
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To: KOSAKI Motohiro <m-kosaki@ceres.dti.ne.jp>
CC: Pavel Machek <pavel@ucw.cz>, Rick van Rein <rick@vanrein.org>,
       linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2.6.24] mm: BadRAM support for broken memory
References: <20080302134221.GA25196@phantom.vanrein.org>	 <20080303141438.GD12606@elf.ucw.cz> <2f11576a0803030841g43f673d9w6b9a5cc8c6e35340@mail.gmail.com>
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KOSAKI Motohiro wrote:
> Hi!
> 
>>  > This is the latest version of the BadRAM patch, which makes it possible to
>>  > run Linux on broken memory.  The patch supports the use of a lesser grade
>>  > of memory, which could be marketed more cheaply and which would thereby
>>  > decrease the environmental stress caused by the process of (memory) chip
>>  > manufacturing.
>>
>>  What is wrong with mem=exactmap?
> 
> Agghh,
> I had forgotten that.
> 
> you are right, may be.

More importantly:

	memmap=<size>$<len>

already allows you to knock arbitrary holes in the memory map.

	-hpa

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