From owner-freebsd-arch@FreeBSD.ORG Fri Sep 28 20:15:26 2007 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 E721416A419 for ; Fri, 28 Sep 2007 20:15:26 +0000 (UTC) (envelope-from imp@bsdimp.com) Received: from harmony.bsdimp.com (bsdimp.com [199.45.160.85]) by mx1.freebsd.org (Postfix) with ESMTP id 857DC13C45A for ; Fri, 28 Sep 2007 20:15:26 +0000 (UTC) (envelope-from imp@bsdimp.com) Received: from localhost (localhost [127.0.0.1]) by harmony.bsdimp.com (8.14.1/8.13.4) with ESMTP id l8SKDjwO001274; Fri, 28 Sep 2007 14:13:46 -0600 (MDT) (envelope-from imp@bsdimp.com) Date: Fri, 28 Sep 2007 14:13:45 -0600 (MDT) Message-Id: <20070928.141345.78789158.imp@bsdimp.com> To: hselasky@c2i.net From: Warner Losh In-Reply-To: <200709281753.30367.hselasky@c2i.net> References: <200709262157.02712.hselasky@c2i.net> <46FB03B1.6020100@samsco.org> <200709281753.30367.hselasky@c2i.net> X-Mailer: Mew version 3.3 on Emacs 21.3 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-2.0 (harmony.bsdimp.com [127.0.0.1]); Fri, 28 Sep 2007 14:13:47 -0600 (MDT) Cc: scottl@samsco.org, freebsd-arch@FreeBSD.org Subject: Re: Request for feedback on common data backstore in the kernel 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: Fri, 28 Sep 2007 20:15:27 -0000 Hans Petter Selasky wrote: > > Well, the point is that I'm not sure why you're so worried about > > performance issues with USB and busdma. Do you have any test data that > > shows that it's a problem? > > It is a problem on embedded devices. Typically not for an ordinary PC user. I'm curious. What's the problem? Warner