From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Wed, 15 Nov 2006 16:57:56 -0800 (PST) From: Christoph Lameter Subject: Re: [patch 2/2] enables booting a NUMA system where some nodes have no memory In-Reply-To: <20061116095429.0e6109a7.kamezawa.hiroyu@jp.fujitsu.com> Message-ID: References: <20061115193049.3457b44c@localhost> <20061115193437.25cdc371@localhost> <20061115215845.GB20526@sgi.com> <455B9825.3030403@mbligh.org> <20061116095429.0e6109a7.kamezawa.hiroyu@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: KAMEZAWA Hiroyuki Cc: mbligh@mbligh.org, steiner@sgi.com, krafft@de.ibm.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org List-ID: On Thu, 16 Nov 2006, KAMEZAWA Hiroyuki wrote: > > But there is no memory on the node. Does the zonelist contain the zones of > > the node without memory or not? We simply fall back each allocation to the > > next node as if the node was overflowing? > yes. just fallback. Ok, so we got a useless pglist_data struct and the struct zone contains a zonelist that does not include the zone. numa_node_id() points to this and we always get allocations redirected to other nodes. The slab duplicates its per node structures on the fallback node. > The zonelist[] donen't contain empty-zone. So we will never encounter that zone except when going to the pglist_data struct through numa_node_id()? -- 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