From owner-freebsd-hackers@FreeBSD.ORG Thu Oct 4 09:48:21 2007 Return-Path: Delivered-To: hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 7278716A418 for ; Thu, 4 Oct 2007 09:48:21 +0000 (UTC) (envelope-from bright@elvis.mu.org) Received: from elvis.mu.org (elvis.mu.org [192.203.228.196]) by mx1.freebsd.org (Postfix) with ESMTP id 5F52D13C45A for ; Thu, 4 Oct 2007 09:48:21 +0000 (UTC) (envelope-from bright@elvis.mu.org) Received: by elvis.mu.org (Postfix, from userid 1192) id 4BF381A4D81; Thu, 4 Oct 2007 02:48:21 -0700 (PDT) Date: Thu, 4 Oct 2007 02:48:21 -0700 From: Alfred Perlstein To: Dag-Erling Sm??rgrav Message-ID: <20071004094821.GM31826@elvis.mu.org> References: <20071003015231.GJ31826@elvis.mu.org> <86zlyzqmgo.fsf@ds4.des.no> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <86zlyzqmgo.fsf@ds4.des.no> User-Agent: Mutt/1.4.2.3i Cc: hackers@freebsd.org Subject: Re: Critical Sections for userland. X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 04 Oct 2007 09:48:21 -0000 * Dag-Erling Sm??rgrav [071004 02:05] wrote: > Alfred Perlstein writes: > > Hi guys, we need critical sections for userland here. > > > > This is basically to avoid a process being switched out while holding > > a user level spinlock. > > Yeah, great idea, cooperative multitasking is the new black! Do you have: a) Evidence or a paper to prove that this is a bad idea? b) A helpful suggestion? c) An obvious understanding of the problem? If not then perhaps one ought to restrict snarky comments to private mail where they will be at least somewhat appreciated. -- - Alfred Perlstein