From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264717AbUHFDMB (ORCPT ); Thu, 5 Aug 2004 23:12:01 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265222AbUHFDMB (ORCPT ); Thu, 5 Aug 2004 23:12:01 -0400 Received: from holomorphy.com ([207.189.100.168]:5064 "EHLO holomorphy.com") by vger.kernel.org with ESMTP id S264717AbUHFDMA (ORCPT ); Thu, 5 Aug 2004 23:12:00 -0400 Date: Thu, 5 Aug 2004 20:11:53 -0700 From: William Lee Irwin III To: Andy Isaacson Cc: Marcelo Tosatti , "Mr. Berkley Shands" , linux-kernel@vger.kernel.org Subject: Re: Severe I/O performance regression 2.6.6 to 2.6.7 or 2.6.8-rc3 Message-ID: <20040806031153.GO17188@holomorphy.com> Mail-Followup-To: William Lee Irwin III , Andy Isaacson , Marcelo Tosatti , "Mr. Berkley Shands" , linux-kernel@vger.kernel.org References: <41126811.7020607@dssimail.com> <20040805172531.GC17188@holomorphy.com> <4112917A.3080003@cse.wustl.edu> <20040805204615.GJ17188@holomorphy.com> <20040805223319.GA18155@logos.cnet> <20040806020930.GA23072@hexapodia.org> <20040806022734.GN17188@holomorphy.com> <20040806024221.GA19333@hexapodia.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20040806024221.GA19333@hexapodia.org> User-Agent: Mutt/1.5.6+20040722i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Aug 05, 2004 at 07:27:34PM -0700, William Lee Irwin III wrote: >> Once we get there, there must be some way to construct intermediate >> points between those two faithful at the very least to the snapshot >> ordering if not true chronological ordering. On Thu, Aug 05, 2004 at 09:42:21PM -0500, Andy Isaacson wrote: > Well, the state of the "central tree" is represented by a cset key at > each point. So the answer to your question is a list of keys. But the > keys in question aren't "special" in any bk sense; they're just some > keys. You can keep track of keys outside of BK if you want, to keep a > history of "state of this tree at time X", but BK can't keep track of > that info. > Anyways, maybe an example is in order. [...] Sounds like time to put this into Documentation/ -- wli