From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751317AbWGKU5z (ORCPT ); Tue, 11 Jul 2006 16:57:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751322AbWGKU5z (ORCPT ); Tue, 11 Jul 2006 16:57:55 -0400 Received: from saraswathi.solana.com ([198.99.130.12]:43148 "EHLO saraswathi.solana.com") by vger.kernel.org with ESMTP id S1751317AbWGKU5y (ORCPT ); Tue, 11 Jul 2006 16:57:54 -0400 Date: Tue, 11 Jul 2006 16:55:45 -0400 From: Jeff Dike To: Nick Piggin Cc: Jan Engelhardt , Joshua Hudson , linux-kernel@vger.kernel.org Subject: Re: [OT] 'volatile' in userspace Message-ID: <20060711205545.GA13660@ccure.user-mode-linux.org> References: <44B0FAD5.7050002@argo.co.il> <20060709195114.GB17128@thunk.org> <20060709204006.GA5242@nospam.com> <20060710034250.GA15138@thunk.org> <44B29461.40605@yahoo.com.au> <44B39151.10600@yahoo.com.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <44B39151.10600@yahoo.com.au> User-Agent: Mutt/1.4.2.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jul 11, 2006 at 09:53:53PM +1000, Nick Piggin wrote: > But I don't see how the volatile or pipe solutions are any better > though: it would seem that both result in undefined behaviour > according to my vfork man page. What undefined behavior does the pipe solution result in, considering it doesn't use vfork? Jeff