From owner-freebsd-hackers@FreeBSD.ORG Thu Oct 4 09:21:58 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 4824416A421 for ; Thu, 4 Oct 2007 09:21:58 +0000 (UTC) (envelope-from des@des.no) Received: from tim.des.no (tim.des.no [194.63.250.121]) by mx1.freebsd.org (Postfix) with ESMTP id 0272B13C447 for ; Thu, 4 Oct 2007 09:21:57 +0000 (UTC) (envelope-from des@des.no) Received: from tim.des.no (localhost [127.0.0.1]) by spam.des.no (Postfix) with ESMTP id C762120C0; Thu, 4 Oct 2007 11:05:11 +0200 (CEST) X-Spam-Tests: AWL X-Spam-Learn: disabled X-Spam-Score: -0.0/3.0 X-Spam-Checker-Version: SpamAssassin 3.2.3 (2007-08-08) on tim.des.no Received: from ds4.des.no (des.no [80.203.243.180]) by smtp.des.no (Postfix) with ESMTP id AA65A20BF; Thu, 4 Oct 2007 11:05:11 +0200 (CEST) Received: by ds4.des.no (Postfix, from userid 1001) id 9568D84486; Thu, 4 Oct 2007 11:05:11 +0200 (CEST) From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= To: Alfred Perlstein References: <20071003015231.GJ31826@elvis.mu.org> Date: Thu, 04 Oct 2007 11:05:11 +0200 In-Reply-To: <20071003015231.GJ31826@elvis.mu.org> (Alfred Perlstein's message of "Tue\, 2 Oct 2007 18\:52\:31 -0700") Message-ID: <86zlyzqmgo.fsf@ds4.des.no> User-Agent: Gnus/5.110006 (No Gnus v0.6) Emacs/22.1 (berkeley-unix) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable 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 09:21:58 -0000 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! DES --=20 Dag-Erling Sm=C3=B8rgrav - des@des.no