From owner-freebsd-hackers Sat Jun 8 08:24:01 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id IAA01306 for hackers-outgoing; Sat, 8 Jun 1996 08:24:01 -0700 (PDT) Received: from parkplace.cet.co.jp (parkplace.cet.co.jp [202.32.64.1]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id IAA01222; Sat, 8 Jun 1996 08:23:50 -0700 (PDT) Received: from localhost (michaelh@localhost) by parkplace.cet.co.jp (8.7.5/CET-v2.1) with SMTP id AAA18598; Sun, 9 Jun 1996 00:23:01 +0900 (JST) Date: Sun, 9 Jun 1996 00:23:01 +0900 (JST) From: Michael Hancock To: Nate Williams cc: Terry Lambert , hackers@FreeBSD.org, freebsd-stable@FreeBSD.org, FreeBSD-current@FreeBSD.org Subject: Re: The -stable problem: my view In-Reply-To: <199606080407.WAA02519@rocky.sri.MT.net> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-hackers@FreeBSD.org X-Loop: FreeBSD.org Precedence: bulk On Fri, 7 Jun 1996, Nate Williams wrote: > > > > Terry proposes a set of tools to help enforce the policy of always having > > ^^^^^^ > > > > I said help not guarantee. The tools would help resolve reads while > > commits are being done. Multiple reader/single writer locks are a cheap > > effective way to do this. > > They wouldn't enforce or even help the policy. Multiple reader/single > writer locks don't solve any significant problem we've faced. Why do > something that limits the ability of developers to commit changes when > the problem the fix happens .001% of the time? So what's the commit protocol now, e-mail? This sounds more limiting on a developer's schedule no matter how many committers there are. I assume there are more than two and they would probably rather focus on writing code than coordinating commits manually. > It's like making a loop that gets called once at initialization time 50% > faster while you leave the sorting algorithm which takes up 95% of CPU > time alone. It's doesn't buy you anything but a warm fuzzy feeling. I'm not convinced this analogy holds. With all the problems I saw over the last 2 weeks it sure seemed like more than a slip of commit discipline. -mike hancock