Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S936056AbZDCVnx (ORCPT ); Fri, 3 Apr 2009 17:43:53 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758293AbZDCVnn (ORCPT ); Fri, 3 Apr 2009 17:43:43 -0400 Received: from smtp-out.google.com ([216.239.33.17]:18961 "EHLO smtp-out.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757631AbZDCVnm (ORCPT ); Fri, 3 Apr 2009 17:43:42 -0400 DomainKey-Signature: a=rsa-sha1; s=beta; d=google.com; c=nofws; q=dns; h=date:from:x-x-sender:to:cc:subject:in-reply-to:message-id: references:user-agent:mime-version:content-type:x-system-of-record; b=CRy5TeE1z7lbk9pSMllv9/IgOi42Uzlfweo+ScTS6c8jS8d7DL8WmjE/wnLgWa7lz ybi3lIKQhS2KBOIRqOeMA== Date: Fri, 3 Apr 2009 14:43:32 -0700 (PDT) From: David Rientjes X-X-Sender: rientjes@chino.kir.corp.google.com To: Andi Kleen cc: Chris Worley , Yinghai Lu , linux-kernel@vger.kernel.org Subject: Re: Off topic: Numactl "distance" wrong In-Reply-To: <87vdpljuqi.fsf@basil.nowhere.org> Message-ID: References: <87vdpljuqi.fsf@basil.nowhere.org> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-System-Of-Record: true Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1104 Lines: 24 On Fri, 3 Apr 2009, Andi Kleen wrote: > > Who would be the right person (or list) to talk about this? > > Your BIOS vendor whose code reported the wrong values. Not that it matters > really on small systems. > The numactl --hardware values are coming directly from the sysfs per-node distance interface, so this may not be a result of erroneous BIOS data but rather the lack of a SLIT to describe the physical topology better. When we lack a SLIT, nodes are simply given these remote distances of 20 because their ids differ. Yinghai, can you elaborate on exactly what type of interface you can imagine for modifying the distance for nodes through sysfs? It seems like you'd have to report the entire physical topology in one write, for which we currently don't have an interface for beyond pxms, instead of per-node distances to remote nodes. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/