linux-kernel - Re: [PATCH 2/3] x86: Define _PAGE_NUMA with unused physical address bits PMD and PTE levels

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Message-ID: <5344631D.1050203@zytor.com>
Date:	Tue, 08 Apr 2014 13:59:09 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Steven Noonan <steven@...inklabs.net>
CC:	Mel Gorman <mgorman@...e.de>, Cyrill Gorcunov <gorcunov@...il.com>,
	David Vrabel <david.vrabel@...rix.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...nel.org>, Rik van Riel <riel@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Linux-MM <linux-mm@...ck.org>, Linux-X86 <x86@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Pavel Emelyanov <xemul@...allels.com>
Subject: Re: [PATCH 2/3] x86: Define _PAGE_NUMA with unused physical address
 bits PMD and PTE levels

On 04/08/2014 01:51 PM, Steven Noonan wrote:
> On Tue, Apr 8, 2014 at 8:16 AM, H. Peter Anvin <hpa@...or.com> wrote:
>> <snark>
>>
>> Of course, it would also be preferable if Amazon (or anything else) didn't need Xen PV :(
> 
> Well Amazon doesn't expose NUMA on PV, only on HVM guests.
> 

Yes, but Amazon is one of the main things keeping Xen PV alive as far as
I can tell, which means the support gets built in, and so on.

	-hpa


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