From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751698AbXDMCSD (ORCPT ); Thu, 12 Apr 2007 22:18:03 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752221AbXDMCSD (ORCPT ); Thu, 12 Apr 2007 22:18:03 -0400 Received: from waste.org ([66.93.16.53]:50552 "EHLO waste.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751698AbXDMCSB (ORCPT ); Thu, 12 Apr 2007 22:18:01 -0400 Date: Thu, 12 Apr 2007 21:05:30 -0500 From: Matt Mackall To: Andrew Morton Cc: Nick Piggin , William Lee Irwin III , linux-kernel@vger.kernel.org Subject: Re: [PATCH 0/13] maps: pagemap, kpagemap, and related cleanups Message-ID: <20070413020530.GM11115@waste.org> References: <1.486631555@selenic.com> <20070412231050.GN2986@holomorphy.com> <20070412163235.dd030637.akpm@linux-foundation.org> <461ECB9C.8060000@yahoo.com.au> <20070412174201.065068b2.akpm@linux-foundation.org> <461ED96C.5030606@yahoo.com.au> <20070412182213.a18cc4a7.akpm@linux-foundation.org> <461EE005.6070605@yahoo.com.au> <20070412185723.5a5f0443.akpm@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070412185723.5a5f0443.akpm@linux-foundation.org> User-Agent: Mutt/1.5.13 (2006-08-11) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Apr 12, 2007 at 06:57:23PM -0700, Andrew Morton wrote: > I guess one could generate an answer to the static question with systemtap, > by accumulating running counts across the application lifetime and then > snapshotting them. Sounds hard though. You'd have to do it from boot onward to get a complete system image. One way to look at it is that systemtap can give you the derivative of the information, and you have to integrate it. -- Mathematics is the supreme nostalgia of our time.