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

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Message-ID: <20080322134814.7258ff0c@laptopd505.fenrus.org>
Date:	Sat, 22 Mar 2008 13:48:14 -0700
From:	Arjan van de Ven <arjan@...radead.org>
To:	yhlu.kernel@...il.com
Cc:	yhlu.kernel.send@...il.com,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	kernel list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86_64: early memtest to find bad ram

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)


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