From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ee0-f47.google.com (mail-ee0-f47.google.com [74.125.83.47]) by kanga.kvack.org (Postfix) with ESMTP id 7C5C86B0031 for ; Tue, 8 Apr 2014 12:47:50 -0400 (EDT) Received: by mail-ee0-f47.google.com with SMTP id b15so906252eek.34 for ; Tue, 08 Apr 2014 09:47:48 -0700 (PDT) Received: from mx2.suse.de (cantor2.suse.de. [195.135.220.15]) by mx.google.com with ESMTPS id 43si3505313eei.265.2014.04.08.09.47.47 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Tue, 08 Apr 2014 09:47:47 -0700 (PDT) Date: Tue, 8 Apr 2014 17:47:44 +0100 From: Mel Gorman Subject: Re: [PATCH 2/3] x86: Define _PAGE_NUMA with unused physical address bits PMD and PTE levels Message-ID: <20140408164744.GM7292@suse.de> References: <20140407161910.GJ1444@moon> <20140407182854.GH7292@suse.de> <5342FC0E.9080701@zytor.com> <20140407193646.GC23983@moon> <5342FFB0.6010501@zytor.com> <20140407212535.GJ7292@suse.de> <20140408160250.GE31554@phenom.dumpdata.com> <534420F1.3030301@zytor.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline In-Reply-To: <534420F1.3030301@zytor.com> Sender: owner-linux-mm@kvack.org List-ID: To: "H. Peter Anvin" Cc: Konrad Rzeszutek Wilk , Steven Noonan , Cyrill Gorcunov , David Vrabel , Linus Torvalds , Ingo Molnar , Rik van Riel , Andrew Morton , Peter Zijlstra , Andrea Arcangeli , Linux-MM , Linux-X86 , LKML , Pavel Emelyanov On Tue, Apr 08, 2014 at 09:16:49AM -0700, H. Peter Anvin wrote: > On 04/08/2014 09:02 AM, Konrad Rzeszutek Wilk wrote: > >>> > >>> Amazon EC2 does have large memory instance types with NUMA exposed to > >>> the guest (e.g. c3.8xlarge, i2.8xlarge, etc), so it'd be preferable > >>> (to me anyway) if we didn't require !XEN. > > > > What about the patch that David Vrabel posted: > > > > http://osdir.com/ml/general/2014-03/msg41979.html > > > > Has anybody taken it for a spin? > > > > Oh lovely, more pvops in low level paths. I'm so thrilled. > > Incidentally, I wasn't even Cc:'d on that patch and was only added to > the thread by Linus, but never saw the early bits of the thread > including the actual patch. > I posted an alternative to that patch that confines the damage to the NUMA pte helpers. -- Mel Gorman SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757367AbaDHQrt (ORCPT ); Tue, 8 Apr 2014 12:47:49 -0400 Received: from cantor2.suse.de ([195.135.220.15]:38032 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756894AbaDHQrs (ORCPT ); Tue, 8 Apr 2014 12:47:48 -0400 Date: Tue, 8 Apr 2014 17:47:44 +0100 From: Mel Gorman To: "H. Peter Anvin" Cc: Konrad Rzeszutek Wilk , Steven Noonan , Cyrill Gorcunov , David Vrabel , Linus Torvalds , Ingo Molnar , Rik van Riel , Andrew Morton , Peter Zijlstra , Andrea Arcangeli , Linux-MM , Linux-X86 , LKML , Pavel Emelyanov Subject: Re: [PATCH 2/3] x86: Define _PAGE_NUMA with unused physical address bits PMD and PTE levels Message-ID: <20140408164744.GM7292@suse.de> References: <20140407161910.GJ1444@moon> <20140407182854.GH7292@suse.de> <5342FC0E.9080701@zytor.com> <20140407193646.GC23983@moon> <5342FFB0.6010501@zytor.com> <20140407212535.GJ7292@suse.de> <20140408160250.GE31554@phenom.dumpdata.com> <534420F1.3030301@zytor.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline In-Reply-To: <534420F1.3030301@zytor.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Apr 08, 2014 at 09:16:49AM -0700, H. Peter Anvin wrote: > On 04/08/2014 09:02 AM, Konrad Rzeszutek Wilk wrote: > >>> > >>> Amazon EC2 does have large memory instance types with NUMA exposed to > >>> the guest (e.g. c3.8xlarge, i2.8xlarge, etc), so it'd be preferable > >>> (to me anyway) if we didn't require !XEN. > > > > What about the patch that David Vrabel posted: > > > > http://osdir.com/ml/general/2014-03/msg41979.html > > > > Has anybody taken it for a spin? > > > > Oh lovely, more pvops in low level paths. I'm so thrilled. > > Incidentally, I wasn't even Cc:'d on that patch and was only added to > the thread by Linus, but never saw the early bits of the thread > including the actual patch. > I posted an alternative to that patch that confines the damage to the NUMA pte helpers. -- Mel Gorman SUSE Labs