From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from qmta01.emeryville.ca.mail.comcast.net (qmta01.emeryville.ca.mail.comcast.net [76.96.30.16]) by ozlabs.org (Postfix) with ESMTP id 1F8642C00C1 for ; Thu, 20 Feb 2014 03:11:40 +1100 (EST) Date: Wed, 19 Feb 2014 10:11:33 -0600 (CST) From: Christoph Lameter To: Nishanth Aravamudan Subject: Re: [RFC PATCH 2/3] topology: support node_numa_mem() for determining the fallback node In-Reply-To: <20140218222242.GA10844@linux.vnet.ibm.com> Message-ID: References: <20140210191321.GD1558@linux.vnet.ibm.com> <20140211074159.GB27870@lge.com> <20140213065137.GA10860@linux.vnet.ibm.com> <20140217070051.GE3468@lge.com> <20140218172832.GD31998@linux.vnet.ibm.com> <20140218210923.GA28170@linux.vnet.ibm.com> <20140218222242.GA10844@linux.vnet.ibm.com> Content-Type: TEXT/PLAIN; charset=US-ASCII Cc: Han Pingtian , Matt Mackall , Pekka Enberg , Linux Memory Management List , Paul Mackerras , Anton Blanchard , David Rientjes , Joonsoo Kim , linuxppc-dev@lists.ozlabs.org, Wanpeng Li List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Tue, 18 Feb 2014, Nishanth Aravamudan wrote: > the performance impact of the underlying NUMA configuration. I guess we > could special-case memoryless/cpuless configurations somewhat, but I > don't think there's any reason to do that if we can make memoryless-node > support work in-kernel? Well we can make it work in-kernel but it always has been a bit wacky (as is the idea of numa "memory" nodes without memory).