linux-kernel - Re: x86-64: memset()/memcpy() not fully standards compliant

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Message-ID: <4F077FDD.8080201@zytor.com>
Date:	Fri, 06 Jan 2012 15:12:29 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Andi Kleen <andi@...stfloor.org>
CC:	Jan Beulich <JBeulich@...e.com>, mingo@...e.hu, tglx@...utronix.de,
	linux-kernel@...r.kernel.org
Subject: Re: x86-64: memset()/memcpy() not fully standards compliant

On 01/06/2012 11:44 AM, Andi Kleen wrote:
>> enough beyond 292G. At some later point ->node_page_cgroup[]
>> also exceeds 4G. Finally, the phys-to-machine mapping (which gets
>> resized during boot) exceeds 4G when crossing the 2T boundary.
> 
> Ok it's moot then because the old systems with problem didn't have
> that much memory. So you could do without an errata workaround
> and just extend the moves at the minor cost of a few prefixes
> (I think that is what you did in your patch)
> 

That seems like the way to go unless we can identify a real problem.

	-hpa

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