Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932451AbYBZXlo (ORCPT ); Tue, 26 Feb 2008 18:41:44 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754176AbYBZXle (ORCPT ); Tue, 26 Feb 2008 18:41:34 -0500 Received: from wr-out-0506.google.com ([64.233.184.236]:37502 "EHLO wr-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753546AbYBZXld (ORCPT ); Tue, 26 Feb 2008 18:41:33 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=blmAP1NXMGk9GSKNi4FBz9WIsTR1EONrMlEYRa2RVaEVSLUYdTmJMcF/7PPAr/YGEu1wJDT1zezyk1qVgGijp4bDi3LpXvLWAShJwAQkK3kUDULFM1Y7c3fB7jWMEZD/fqI/UfUA/V3N/Xb945R1v+GTCZNCNoDTMURYzF4nj1s= Message-ID: <86802c440802261541s67810687pb7079200288c1e20@mail.gmail.com> Date: Tue, 26 Feb 2008 15:41:27 -0800 From: "Yinghai Lu" To: "Ravikiran Thirumalai" Subject: Re: [PATCH] x86_64: make amd quad core 8 socket system not be clustered_box v2 Cc: "Andi Kleen" , "Ingo Molnar" , "Andrew Morton" , "Linux Kernel Mailing List" , shai@scalemp.com In-Reply-To: <20080226233111.GA9734@localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20080226033945.GJ3143@localdomain> <20080226040541.GK3143@localdomain> <86802c440802252127i36fcd164xe6671aada160766a@mail.gmail.com> <20080226184235.GA5914@localdomain> <86802c440802261100j322ee6a6yef9108dc175de459@mail.gmail.com> <20080226203235.GH5914@localdomain> <86802c440802261310y176cdfel38843e264bc71f82@mail.gmail.com> <20080226212418.GJ5914@localdomain> <86802c440802261516n1ca8ef6eh5e6abdd0c3f959dd@mail.gmail.com> <20080226233111.GA9734@localdomain> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1706 Lines: 43 On Tue, Feb 26, 2008 at 3:31 PM, Ravikiran Thirumalai wrote: > On Tue, Feb 26, 2008 at 03:16:16PM -0800, Yinghai Lu wrote: > >On Tue, Feb 26, 2008 at 1:24 PM, Ravikiran Thirumalai wrote: > >> > >> On Tue, Feb 26, 2008 at 01:10:57PM -0800, Yinghai Lu wrote: > >> >On Tue, Feb 26, 2008 at 12:32 PM, Ravikiran Thirumalai > >> > wrote: > >> >> On Tue, Feb 26, 2008 at 11:00:58AM -0800, Yinghai Lu wrote: > >> >> > > >> >> >1. if acpi=off ? > >> >> > >> >> Well that is not a realistic scenario for any multi chassi NUMA machine, > >> >> since the proximity information is very important and turning acpi off > >> >> deprives the OS of this information. > >> > > >> >actually OS should detect the distance instead of rely on SLIT. > >> > >> How does it do that? ACPI SRAT is needed to determine this, and it wouldn't > >> work if acpi=off. > > > >srat only have apicid to node mapping, and ram to node mapping. > > Which is very important for performance. > > > > > >for amd64 system, when acpi=off > >ram to node mapping can be retrieved from pci conf space > > I was referring to all types of numa systems, not just AMD. The pci config > space is amd specific. Multi chassi systems in particular would be > acpi SRAT based. Anyways. can you try x86.git#testing your vsmp to see if is_vsmp_box is working? http://people.redhat.com/mingo/x86.git/README YH -- 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/