From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262161AbTD3MpH (ORCPT ); Wed, 30 Apr 2003 08:45:07 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262162AbTD3MpH (ORCPT ); Wed, 30 Apr 2003 08:45:07 -0400 Received: from holomorphy.com ([66.224.33.161]:32466 "EHLO holomorphy") by vger.kernel.org with ESMTP id S262161AbTD3MpF (ORCPT ); Wed, 30 Apr 2003 08:45:05 -0400 Date: Wed, 30 Apr 2003 05:57:17 -0700 From: William Lee Irwin III To: Christoph Hellwig , alan@lxorguk.ukuu.org.uk, linux-kernel@vger.kernel.org Subject: Re: NUMA-Q sys_ioperm()/sys_iopl() Message-ID: <20030430125717.GE8978@holomorphy.com> Mail-Followup-To: William Lee Irwin III , Christoph Hellwig , alan@lxorguk.ukuu.org.uk, linux-kernel@vger.kernel.org References: <20030430122825.GL8931@holomorphy.com> <20030430135521.A5383@infradead.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20030430135521.A5383@infradead.org> Organization: The Domain of Holomorphy User-Agent: Mutt/1.5.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Apr 30, 2003 at 05:28:25AM -0700, William Lee Irwin III wrote: >> NUMA-Q cannot support these operations without significant >> infrastructure to emulate a global port io space for userspace to >> manipulate, possibly even with hooks into the scheduler. >> Not only are the applications depending on this particular form of >> privilege elevation generally inappropriate uses of these machines >> (they are large "server-class" machines, typically shipped and run >> headless), but the devices typically managed with these interfaces >> are already explicitly unsupported in UNIX configurations. >> This patch removes sys_iopl() and sys_ioperm() support conditional on >> #ifdef CONFIG_X86_NUMAQ to prevent the device register corruption >> condition without significant impact on core i386 support. On Wed, Apr 30, 2003 at 01:55:21PM +0100, Christoph Hellwig wrote: > Please use cond_syscall to autogenerate the stubs, and make the compilation > of /ioport.c conditional on !CONFIG_X86_NUMAQ. Never heard of it before. Get a hold of me in the obvious way to fill me in. Thanks. -- wli