From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754391Ab0I1Mtp (ORCPT ); Tue, 28 Sep 2010 08:49:45 -0400 Received: from smtp104.prem.mail.ac4.yahoo.com ([76.13.13.43]:28264 "HELO smtp104.prem.mail.ac4.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1753576Ab0I1Mtp (ORCPT ); Tue, 28 Sep 2010 08:49:45 -0400 X-Yahoo-SMTP: _Dag8S.swBC1p4FJKLCXbs8NQzyse1SYSgnAbY0- X-YMail-OSG: Rpb81JIVM1l9k2EouXvVOn3U2oTLFLAxgHRnuV8.UXG8313 ccxzzGWFuYl2HYWe_zLcJK5HG02kAlpFHKrVnSU.JiFZa9WA0rw3XQr_ssZq jjObVkKyVG9MhlWOhDQr6RrkrwR31TxpXrr4G8v5dwTAcosfqtamLj5g9gQH hPYCw7iKbS6ihLDWaQI6.r74ZQ9uanjwcfBWGnCOV2z_6FZJDWHECnDxutC8 kWVUvKJIhhs6SeunQ2ad22lRw3CEX X-Yahoo-Newman-Property: ymail-3 Date: Tue, 28 Sep 2010 07:49:40 -0500 (CDT) From: Christoph Lameter X-X-Sender: cl@router.home To: Bron Gondwana cc: Robert Mueller , KOSAKI Motohiro , Mel Gorman , Linux Kernel Mailing List , linux-mm Subject: Re: Default zone_reclaim_mode = 1 on NUMA kernel is bad forfile/email/web servers In-Reply-To: <1285677740.30176.1397281937@webmail.messagingengine.com> Message-ID: References: <52C8765522A740A4A5C027E8FDFFDFE3@jem> <20100921090407.GA11439@csn.ul.ie> <20100927110049.6B31.A69D9226@jp.fujitsu.com> <1285629420.10278.1397188599@webmail.messagingengine.com> <1285677740.30176.1397281937@webmail.messagingengine.com> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 28 Sep 2010, Bron Gondwana wrote: > Is this what's happening, or is IO actually coming from disk in preference > to the remote node? I can certainly see the logic behind preferring to > reclaim the local node if that's all that's happening - though the OS should > be allocating the different tasks more evenly across the nodes in that case. Not sure about the disk. I did not see anything that would indicate and issue with only being able to do 32 bit and I am no expert on the device driver operations. From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail172.messagelabs.com (mail172.messagelabs.com [216.82.254.3]) by kanga.kvack.org (Postfix) with SMTP id AFD296B004A for ; Tue, 28 Sep 2010 08:49:44 -0400 (EDT) Date: Tue, 28 Sep 2010 07:49:40 -0500 (CDT) From: Christoph Lameter Subject: Re: Default zone_reclaim_mode = 1 on NUMA kernel is bad forfile/email/web servers In-Reply-To: <1285677740.30176.1397281937@webmail.messagingengine.com> Message-ID: References: <52C8765522A740A4A5C027E8FDFFDFE3@jem> <20100921090407.GA11439@csn.ul.ie> <20100927110049.6B31.A69D9226@jp.fujitsu.com> <1285629420.10278.1397188599@webmail.messagingengine.com> <1285677740.30176.1397281937@webmail.messagingengine.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org To: Bron Gondwana Cc: Robert Mueller , KOSAKI Motohiro , Mel Gorman , Linux Kernel Mailing List , linux-mm List-ID: On Tue, 28 Sep 2010, Bron Gondwana wrote: > Is this what's happening, or is IO actually coming from disk in preference > to the remote node? I can certainly see the logic behind preferring to > reclaim the local node if that's all that's happening - though the OS should > be allocating the different tasks more evenly across the nodes in that case. Not sure about the disk. I did not see anything that would indicate and issue with only being able to do 32 bit and I am no expert on the device driver operations. -- 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