From owner-freebsd-arch@FreeBSD.ORG Sat Sep 20 20:48:36 2003 Return-Path: Delivered-To: freebsd-arch@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id A790416A4BF for ; Sat, 20 Sep 2003 20:48:36 -0700 (PDT) Received: from harmony.village.org (rover.bsdimp.com [204.144.255.66]) by mx1.FreeBSD.org (Postfix) with ESMTP id B736543FBD for ; Sat, 20 Sep 2003 20:48:35 -0700 (PDT) (envelope-from imp@bsdimp.com) Received: from localhost (warner@rover2.village.org [10.0.0.1]) by harmony.village.org (8.12.9p1/8.12.3) with ESMTP id h8L3mYGA019156; Sat, 20 Sep 2003 21:48:34 -0600 (MDT) (envelope-from imp@bsdimp.com) Date: Sat, 20 Sep 2003 21:48:35 -0600 (MDT) Message-Id: <20030920.214835.101559646.imp@bsdimp.com> To: jdp@polstra.com From: "M. Warner Losh" In-Reply-To: References: <20030920141158.B97439@xorpc.icir.org> 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-arch@freebsd.org Subject: Re: interrupt latency and driver locking X-BeenThere: freebsd-arch@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussion related to FreeBSD architecture List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 21 Sep 2003 03:48:36 -0000 In message: John Polstra writes: : there will be no link changes except at bootstrap and shutdown. For server machines. For laptops, these events happen more often. However, for most laptops, the rate that they happen is typically on less than 1/hour. Still rare enough to not worry about optimizing it and your other points are good. I just wanted to make sure that it wasn't optimized to the point where disconnecting the cable from the laptop to move it accross the room, or another room doesn't cause huge problems. Warner