From owner-freebsd-hackers@FreeBSD.ORG Sat Jul 19 10:17:03 2003 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 4519137B404 for ; Sat, 19 Jul 2003 10:17:03 -0700 (PDT) Received: from harmony.village.org (rover.bsdimp.com [204.144.255.66]) by mx1.FreeBSD.org (Postfix) with ESMTP id 409D743F75 for ; Sat, 19 Jul 2003 10:17:02 -0700 (PDT) (envelope-from imp@bsdimp.com) Received: from localhost (warner@rover2.village.org [10.0.0.1]) by harmony.village.org (8.12.9/8.12.3) with ESMTP id h6JHGwFL025687; Sat, 19 Jul 2003 11:16:58 -0600 (MDT) (envelope-from imp@bsdimp.com) Date: Sat, 19 Jul 2003 11:16:54 -0600 (MDT) Message-Id: <20030719.111654.28438110.imp@bsdimp.com> To: marc.ramirez@bluecirclesoft.com From: "M. Warner Losh" In-Reply-To: <20030718150047.O61759@www.bluecirclesoft.com> References: <20030718150047.O61759@www.bluecirclesoft.com> X-Mailer: Mew version 2.2 on Emacs 21.3 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit cc: freebsd-hackers@freebsd.org Subject: Re: Communications kernel -> userland X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 19 Jul 2003 17:17:03 -0000 In message: <20030718150047.O61759@www.bluecirclesoft.com> Marc Ramirez writes: : I have a device driver that needs to make requests for data from a : userland daemon. What's the preferred method for doing this in 4.8R and : 5.1R? I'm assuming the answer is Unix-domain sockets... what's wrong with a simple read channel? why complicate things by bringing sockets into it? Warner