From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Wed, 15 Nov 2006 21:28:35 -0600 From: Jack Steiner Subject: Re: [patch 2/2] enables booting a NUMA system where some nodes have no memory Message-ID: <20061116032835.GA25299@sgi.com> References: <20061115193049.3457b44c@localhost> <20061115193437.25cdc371@localhost> <20061115215845.GB20526@sgi.com> <20061116013534.GB1066@sgi.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org Return-Path: To: Christoph Lameter Cc: Christian Krafft , linux-mm@kvack.org, Martin Bligh , linux-kernel@vger.kernel.org List-ID: On Wed, Nov 15, 2006 at 05:57:27PM -0800, Christoph Lameter wrote: > On Wed, 15 Nov 2006, Jack Steiner wrote: > > > I doubt that there is a demand for systems with memoryless nodes. However, if the > > DIMM(s) on a node fails, I think the system may perform better > > with the cpus on the node enabled than it will if they have to be > > disabled. > > Right now we do not have the capability to remove memory from a node while > the system is running. I know. I'm refering to a DIMM that fails power-on diags or one that is explicitly disabled from the system controller. Clearly a reboot is required in both cases, but the end result is a node with cpus and no memory. As I said earlier, the PROM (for several reasons) automatically the cpus on nodes w/o memory. -- 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