Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262677AbVEGEPl (ORCPT ); Sat, 7 May 2005 00:15:41 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262679AbVEGEPk (ORCPT ); Sat, 7 May 2005 00:15:40 -0400 Received: from fire.osdl.org ([65.172.181.4]:56999 "EHLO smtp.osdl.org") by vger.kernel.org with ESMTP id S262677AbVEGEPh (ORCPT ); Sat, 7 May 2005 00:15:37 -0400 Date: Fri, 6 May 2005 21:14:55 -0700 From: Andrew Morton To: Ricky Beam Cc: nico-kernel@schottelius.org, linux-kernel@vger.kernel.org Subject: Re: /proc/cpuinfo format - arch dependent! Message-Id: <20050506211455.3d2b3f29.akpm@osdl.org> In-Reply-To: References: <20050419121530.GB23282@schottelius.org> X-Mailer: Sylpheed version 1.0.0 (GTK+ 1.2.10; i386-vine-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 825 Lines: 18 Ricky Beam wrote: > > Short of a kernel module to export the kernel variables, that's the only > damned way to find the number of cpus in a Linux system. Question is: do you need to know the number of CPUs (why?) or do you need to know the number of CPUs which you're currently allowed to use or do you need to know the maximum number of CPUs which you are allowed to bind yourself to, or what? Probably these things can be worked out via the get/set_affinity() syscalls and/or via the cpuset sysfs interfaces, but it isn't as simple as you're assuming. - 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/