linux-kernel - Re: [PATCH] x86_64: early memtest to find bad ram

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Message-ID: <47E57393.7060606@zytor.com>
Date:	Sat, 22 Mar 2008 14:01:07 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Arjan van de Ven <arjan@...radead.org>
CC:	yhlu.kernel@...il.com, yhlu.kernel.send@...il.com,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	kernel list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86_64: early memtest to find bad ram

Arjan van de Ven wrote:
> On Thu, 20 Mar 2008 23:58:33 -0700
> Yinghai Lu <yhlu.kernel.send@...il.com> wrote:
> 
>> do simple memtest after init_memory_mapping
>>
>> use find_e820_area_size to find all ram range that is not reserved.
> 
> be careful, there's some special memory that e820 right now says is not reserved,
> but still has bios data (the first 4Kb of memory come to mind)
> 

Is that true even after Yinghai's changes?  I have lost track of all the 
patches...

	-hpa
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