From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762116AbZBYKYo (ORCPT ); Wed, 25 Feb 2009 05:24:44 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1761492AbZBYKY1 (ORCPT ); Wed, 25 Feb 2009 05:24:27 -0500 Received: from mail-fx0-f167.google.com ([209.85.220.167]:51375 "EHLO mail-fx0-f167.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761279AbZBYKY0 (ORCPT ); Wed, 25 Feb 2009 05:24:26 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type :content-transfer-encoding; b=fY5OmhedY2C9WNkSZJ5HW5NsVPcv6eDgJcnawYtnbszHDAUlig7tQ/shBHmzN88QDL 24kryyDkTLCclGyWFpSNYBwNogSz9xn7YPz6NadkDcPP+8GKhcHN6apEWOskC6qwclh4 r1KPDjX1tb062NbmnqmIrHLX2PJ5obspTLIgw= MIME-Version: 1.0 In-Reply-To: <20090225020254.97be7715.akpm@linux-foundation.org> References: <20090225025753.798204550@goodmis.org> <20090224203308.8d623e0b.akpm@linux-foundation.org> <20090225081118.GC15303@elte.hu> <20090225002852.5ef5b869.akpm@linux-foundation.org> <84144f020902250100k41e55dd7w8a9c8d2ca96908ea@mail.gmail.com> <20090225012250.db68e480.akpm@linux-foundation.org> <1235554387.3849.30.camel@penberg-laptop> <20090225014442.7b7b7726.akpm@linux-foundation.org> <20090225095623.GB12352@elte.hu> <20090225020254.97be7715.akpm@linux-foundation.org> Date: Wed, 25 Feb 2009 12:24:20 +0200 X-Google-Sender-Auth: decce7796e373eba Message-ID: <84144f020902250224kd8475b8yd9fd9f3ece7155e@mail.gmail.com> Subject: Re: [PATCH 2/4] tracing: add event trace infrastructure From: Pekka Enberg To: Andrew Morton Cc: Ingo Molnar , Steven Rostedt , LKML , Thomas Gleixner , Peter Zijlstra , Frederic Weisbecker , Theodore Tso , Arjan van de Ven , Pekka Paalanen , Arnaldo Carvalho de Melo , Jason Baron , Martin Bligh , Mathieu Desnoyers , "Frank Ch. Eigler" , KOSAKI Motohiro , Jens Axboe , Masami Hiramatsu , Steven Rostedt Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Andrew, On Wed, 25 Feb 2009 10:56:23 +0100 Ingo Molnar wrote: >> Since the concept of a kernel tracing facility being >> self-sufficient and being easy to use is an integral and key >> concept to ftrace, dont you see why people take your suggestions >> as a dismissal of the ftrace concept? On Wed, Feb 25, 2009 at 12:02 PM, Andrew Morton wrote: > Nothing I've suggested in any way makes ftrace hard to use. > > If you guys had gone this way, you would not have screwed it up as much > as you're suggesting. I find it difficult to understand what is it exactly that you're suggesting. AFAICT, the core of the argument is how much post-processing should we do in the kernel. Now keeping all post-processing out of the kernel will make (some) tracers less user-friendly but we obviously don't want to do a full TeX in the kernel either. Maybe identifying the specific plug-ins you have problems with would be useful? I only know some of the ftrace core and the kmemtrace plug-in and I suspect the situation is similar for other plug-in developers as well. So the problem here could be just that you're not getting the message across to the right people. Pekka