linux-kernel - Re: 2.6.25-rc1 xen pvops regression

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Date:	Fri, 22 Feb 2008 11:15:59 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
CC:	Ian Campbell <ijc@...lion.org.uk>,
	"H. Peter Anvin" <hpa@...or.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	Joel Becker <Joel.Becker@...cle.com>,
	Jody Belka <lists-lkml@...b.org>, linux-kernel@...r.kernel.org,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Mika Penttila <mika.penttila@...umbus.fi>
Subject: Re: 2.6.25-rc1 xen pvops regression

Alan Cox wrote:
>> Actually I switched 64bit over to trust e820 completely and not
>> reserve 640k-1MB explicitly some time ago
>> and AFAIK there hasn't been any reports that it causes problems.
>>
>> So presumably trusting e802 is ok on modern systems (2003+)
> 
> Apparently so - at least 64bit capable ones. 

They should all use the same BIOS code bases, except perhaps
some embedded weirdnesses.

We do still sort the entries
> to remove zero length records and other suprises.

That code could be actually dropped. And the sorting too.
It's all not needed I think.

AFAIK none of the e820 access code cares about any of
that.

64bit only has it because I copied it originally and never
bothered to remove it.

-Andi

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