From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932458AbVHRV2N (ORCPT ); Thu, 18 Aug 2005 17:28:13 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932459AbVHRV2N (ORCPT ); Thu, 18 Aug 2005 17:28:13 -0400 Received: from dvhart.com ([64.146.134.43]:35969 "EHLO localhost.localdomain") by vger.kernel.org with ESMTP id S932458AbVHRV2N convert rfc822-to-8bit (ORCPT ); Thu, 18 Aug 2005 17:28:13 -0400 Date: Thu, 18 Aug 2005 14:28:08 -0700 From: "Martin J. Bligh" Reply-To: "Martin J. Bligh" To: Samuel Thibault , Eric Dumazet , linux-kernel@vger.kernel.org, lse-tech@lists.sourceforge.net Subject: Re: [Lse-tech] Re: idle task's task_t allocation on NUMA machines Message-ID: <1704890000.1124400488@flay> In-Reply-To: <20050818200255.GI8822@bouh.labri.fr> References: <20050818140829.GB8123@implementation.labri.fr> <4304A6DF.6040703@cosmosbay.com> <20050818194941.GH8822@bouh.labri.fr> <20050818200255.GI8822@bouh.labri.fr> X-Mailer: Mulberry/2.1.2 (Linux/x86) MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8BIT Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --On Thursday, August 18, 2005 22:02:55 +0200 Samuel Thibault wrote: > Samuel Thibault, le Thu 18 Aug 2005 21:49:41 +0200, a écrit : >> Eric Dumazet, le Thu 18 Aug 2005 17:18:55 +0200, a écrit : >> > I believe IRQ stacks are also allocated on node 0, that seems more serious. >> >> For the i386 architecture at least, yes: they are statically defined in >> arch/i386/kernel/irq.c, while they could be per_cpu. > > Hum, but the per_cpu areas for i386 are not numa-aware... I'm wondering: > isn't the current x86_64 numa-aware implementation of per_cpu generic > enough for any architecture? All ZONE_NORMAL on ia32 is on node 0, so I don't think it'll help. M.