From owner-freebsd-hackers@FreeBSD.ORG Thu Oct 4 10:01:05 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 EFD6A16A417; Thu, 4 Oct 2007 10:01:05 +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 7196313C455; Thu, 4 Oct 2007 10:01:05 +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 CDF9220BA; Thu, 4 Oct 2007 12:00:56 +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 B632520AE; Thu, 4 Oct 2007 12:00:56 +0200 (CEST) Received: by ds4.des.no (Postfix, from userid 1001) id 9E08F84486; Thu, 4 Oct 2007 12:00:56 +0200 (CEST) From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= To: Alfred Perlstein References: <20071003015231.GJ31826@elvis.mu.org> <86zlyzqmgo.fsf@ds4.des.no> <20071004094821.GM31826@elvis.mu.org> Date: Thu, 04 Oct 2007 12:00:56 +0200 In-Reply-To: <20071004094821.GM31826@elvis.mu.org> (Alfred Perlstein's message of "Thu\, 4 Oct 2007 02\:48\:21 -0700") Message-ID: <86ejgbqjvr.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 10:01:06 -0000 Alfred Perlstein writes: > Do you have: > > a) Evidence or a paper to prove that this is a bad idea? I need evidence or a paper to prove that it is a bad idea to allow a userland process to hold the CPU indefinitely? > b) A helpful suggestion? Why don't you tell us what you're actually trying to do, so we can tell you how to do it. > c) An obvious understanding of the problem? I'll show you mine if you show me yours. DES --=20 Dag-Erling Sm=C3=B8rgrav - des@des.no