From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail137.messagelabs.com (mail137.messagelabs.com [216.82.249.19]) by kanga.kvack.org (Postfix) with ESMTP id 0DE5D6B0087 for ; Fri, 10 Dec 2010 18:30:49 -0500 (EST) Received: from kpbe11.cbf.corp.google.com (kpbe11.cbf.corp.google.com [172.25.105.75]) by smtp-out.google.com with ESMTP id oBANUjN2025896 for ; Fri, 10 Dec 2010 15:30:46 -0800 Received: from pvg12 (pvg12.prod.google.com [10.241.210.140]) by kpbe11.cbf.corp.google.com with ESMTP id oBANUhmk025836 for ; Fri, 10 Dec 2010 15:30:44 -0800 Received: by pvg12 with SMTP id 12so1138151pvg.26 for ; Fri, 10 Dec 2010 15:30:43 -0800 (PST) Date: Fri, 10 Dec 2010 15:30:38 -0800 (PST) From: David Rientjes Subject: Re: [7/7,v8] NUMA Hotplug Emulator: Implement per-node add_memory debugfs interface In-Reply-To: <20101209235705.GA10674@shaohui> Message-ID: References: <20101209012124.GD5798@shaohui> <20101209235705.GA10674@shaohui> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org To: Shaohui Zheng Cc: Andrew Morton , linux-mm@kvack.org, linux-kernel@vger.kernel.org, haicheng.li@linux.intel.com, lethal@linux-sh.org, Andi Kleen , Greg Kroah-Hartman List-ID: On Fri, 10 Dec 2010, Shaohui Zheng wrote: > > That doesn't address the question. My question is whether or not adding > > memory to a memoryless node in this way transitions its state to > > N_HIGH_MEMORY in the VM? > I guess that you are talking about memory hotplug on x86_32, memory hotplug is > NOT supported well for x86_32, and the function add_memory does not consider > this situlation. > > For 64bit, N_HIGH_MEMORY == N_NORMAL_MEMORY, so we need not to do the transition. > One more time :) Memoryless nodes do not have their bit set in N_HIGH_MEMORY. When memory is added to a memoryless node with this new interface, does the bit get set? -- 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/ . Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: email@kvack.org