From owner-freebsd-arch@FreeBSD.ORG Thu Jul 19 21:25:58 2012 Return-Path: Delivered-To: freebsd-arch@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 5E8471065672 for ; Thu, 19 Jul 2012 21:25:58 +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 45F3E8FC0A for ; Thu, 19 Jul 2012 21:25:58 +0000 (UTC) Received: by elvis.mu.org (Postfix, from userid 1192) id 2C4B41A3C6D; Thu, 19 Jul 2012 14:25:58 -0700 (PDT) Date: Thu, 19 Jul 2012 14:25:58 -0700 From: Alfred Perlstein To: Matthew Jacob Message-ID: <20120719212558.GO98608@elvis.mu.org> References: <3CE55F29-A5B2-44A7-8854-1ED38BAE6F16@FreeBSD.org> <50075072.5050906@gmail.com> <500752CD.9030107@feral.com> <500830D5.6000409@feral.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <500830D5.6000409@feral.com> User-Agent: Mutt/1.4.2.3i Cc: freebsd-arch@freebsd.org Subject: Re: aio in GENERIC? X-BeenThere: freebsd-arch@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussion related to FreeBSD architecture List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 19 Jul 2012 21:25:58 -0000 * Matthew Jacob [120719 09:08] wrote: > On 7/19/2012 8:58 AM, Adrian Chadd wrote: > >.. the API supports the avoidance of copyin/copyout? > > > > > okay, I'll buy that, although I'm not certain of the utility in general > of that. > > The reason I asked was that I have rarely, if ever, run into an AIO > implementation that was more trouble than it was worth. It certainly has > caused major grief in FreeBSD when used with CAM target mode. {AIO,Pthreads,SMP,etc} are hard, let's go shopping? really? :) -Alfred