From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andi Kleen Subject: Re: [PATCH for 2.6.16] Handle holes in node mask in node fallback list initialization Date: Fri, 17 Feb 2006 10:58:32 +0100 References: <200602170223.34031.ak@suse.de> <20060217145409.4064.Y-GOTO@jp.fujitsu.com> In-Reply-To: <20060217145409.4064.Y-GOTO@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200602171058.33078.ak@suse.de> Sender: owner-linux-mm@kvack.org Return-Path: To: Yasunori Goto Cc: Christoph Lameter , torvalds@osdl.org, akpm@osdl.org, linux-mm@kvack.org List-ID: On Friday 17 February 2006 07:10, Yasunori Goto wrote: > > > Empty nodes are not initialization, but the node number is still > > > allocated. And then it would early except or even triple fault here > > > because it would try to set up a fallback list for a NULL pgdat. Oops. > > > > Isnt this an issue with the arch code? Simply do not allocate an empty > > node. Is the mapping from linux Node id -> Hardware node id fixed on > > x86_64? ia64 has a lookup table. > > Do you mention about pxm_to_nid_map[]? I think he refers to cpu_to_node[] > Ia64 added the feature of memory less node long time ago. x86-64 too, but it just bitrotted and that is what I was trying to fix. I did some tests with a simulator in a few combinations of memory less CPUs and with the two patches they all boot so far. But will test it out more. -Andi -- 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