linux-kernel - Re: [PATCH 1/1] x86, e820: Remove direct mapping of reserved space for HT hole around 1TB

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Message-ID: <507EF833.8020001@zytor.com>
Date:	Wed, 17 Oct 2012 11:25:55 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Jacob Shin <jacob.shin@....com>
CC:	Shuah Khan <shuah.khan@...com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"x86@...nel.org" <x86@...nel.org>, Yinghai Lu <yinghai@...nel.org>,
	shuahkhan@...il.com, andreas.herrmann3@....com,
	borislav.petkov@....com
Subject: Re: [PATCH 1/1] x86, e820: Remove direct mapping of reserved space
 for HT hole around 1TB

On 10/16/2012 11:26 AM, Jacob Shin wrote:
>
> Right, we are (AMD) thinking about the same thing .. how to backport to
> stable kernels of major enterprise OSes
>
> The simplest and the least disruptive solution would be to not map memory
> holes that occur above 4GB, it won't affect 32 bit kernels, and it won't
> touch legacy (under 4GB) area (ISA, the PCI MMIO region ..):
>
> https://lkml.org/lkml/2011/10/20/323
>
> HPA, it would be great if we can first get this patch upstream, and also
> into the stable trees .. and after that, we can work on getting Yinghai's
> mm refactoring in ..
>

Yes, that makes sense at this point.

	-hpa


-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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