From owner-freebsd-stable@FreeBSD.ORG Sun Apr 13 21:59:22 2003 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 89D6037B401 for ; Sun, 13 Apr 2003 21:59:22 -0700 (PDT) Received: from harmony.village.org (rover.bsdimp.com [204.144.255.66]) by mx1.FreeBSD.org (Postfix) with ESMTP id B7E4843F93 for ; Sun, 13 Apr 2003 21:59:21 -0700 (PDT) (envelope-from imp@bsdimp.com) Received: from localhost (warner@rover2.village.org [10.0.0.1]) by harmony.village.org (8.12.8/8.12.3) with ESMTP id h3E4xKA7049096; Sun, 13 Apr 2003 22:59:20 -0600 (MDT) (envelope-from imp@bsdimp.com) Date: Sun, 13 Apr 2003 22:58:14 -0600 (MDT) Message-Id: <20030413.225814.45028971.imp@bsdimp.com> To: cbehanna@panasas.com From: "M. Warner Losh" In-Reply-To: <200304121548.56524.cbehanna@panasas.com> References: <200304121548.56524.cbehanna@panasas.com> X-Mailer: Mew version 2.1 on Emacs 21.2 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit cc: stable@freebsd.org Subject: Re: PATCH: Forcible delaying of UFS (soft)updates X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 14 Apr 2003 04:59:22 -0000 In message: <200304121548.56524.cbehanna@panasas.com> Chris BeHanna writes: : > Unless, of course, your system or power happens to fail. : > Imagine you have a database program keeping track of banking : > transactions. [...] : : Then you won't be running that program on a *laptop*, now, will : you? It'll be in a NOC with hefty power-failover hardware already in : place. : : Can we pretty please keep criticisms of this patch in their proper : context? Power-saving features for a *laptop* have little or no : bearing on the behavior of mission-critical back office applications. Actually, you will. Let's not think laptops are such crappy things that nothing interesting is going on on them. I get all my email on my laptop. nmh uses fsync (or did once upon a time) to make sure that its messages are properly on fixed media format. There are other programs that I use all the time that do this too (emacs springs to mind). When I save a file, I damn well want it on disk, in case the crappy batteries that I have cause me to go down before the timeout period is over. So not only is this not a theoretical objection, the laptop that I'm using right now is a prime example. Warner