linux-kernel - Re: Windows side agrees that lowmem corruption is a problem too

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Date:	Tue, 08 Jun 2010 12:06:05 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Yuhong Bao <yuhongbao_386@...mail.com>
CC:	linux-kernel@...r.kernel.org, mingo@...e.hu, gregkh@...e.de
Subject: Re: Windows side agrees that lowmem corruption is a problem too

On 06/08/2010 11:28 AM, Yuhong Bao wrote:
> 
> Adding mingo and gregkh to CC list.
>> Remember the lowmem corruption problems that lead the code that displays this to be added to Linux:> AMI BIOS detected: BIOS may corrupt low RAM, working around it.> which was IMO way too broad. Good news, the Windows side agree that this is a problem too:> http://www.microsoft.com/whdc/system/platform/firmware/mem-corrupt.mspx>> Yuhong Bao
> 

Hardly "way too broad".  I'm starting to think we should enable it
unconditionally, given the number of machines which have exhibited that
problem.  As shown in the whitepaper, Vista/Win7 even avoid using
< 1 MB for a lot of things, presumably for this reason.

If it only was suspend, it would be one thing, but from what I've seen
it has been known to happen at other times too (e.g. HDMI cable insertion!)

	-hpa
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