From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754697AbYHVOfz (ORCPT ); Fri, 22 Aug 2008 10:35:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753116AbYHVOfp (ORCPT ); Fri, 22 Aug 2008 10:35:45 -0400 Received: from vpn.id2.novell.com ([195.33.99.129]:31985 "EHLO vpn.id2.novell.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752147AbYHVOfo convert rfc822-to-8bit (ORCPT ); Fri, 22 Aug 2008 10:35:44 -0400 Message-Id: <48AEEB1E.76E4.0078.0@novell.com> X-Mailer: Novell GroupWise Internet Agent 7.0.3 Date: Fri, 22 Aug 2008 15:36:46 +0100 From: "Jan Beulich" To: "Ingo Molnar" , "Thomas Gleixner" , Cc: Subject: CONFIG_NR_CPUS limit for 32-bit Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 8BIT Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Given that the fixmap area size depends on NR_CPUS and that it can't possibly cover 4096 CPUs (its size would be beyond 200Mb if I put things together correctly, whereas the vmalloc area [of which the fixmap area is a sub-portion] by default is 128MB) I can't see how this new limit ought to even boot on any system. Therefore I wonder whether the range shouldn't be restricted for X86_32. Jan