From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755755AbYDFB1y (ORCPT ); Sat, 5 Apr 2008 21:27:54 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755421AbYDFB1p (ORCPT ); Sat, 5 Apr 2008 21:27:45 -0400 Received: from [194.117.236.238] ([194.117.236.238]:33161 "EHLO heracles.linux360.ro" rhost-flags-FAIL-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1751504AbYDFB1o convert rfc822-to-8bit (ORCPT ); Sat, 5 Apr 2008 21:27:44 -0400 Date: Sun, 6 Apr 2008 04:27:20 +0300 From: Eduard - Gabriel Munteanu To: Mathieu Desnoyers Cc: LKML , Pekka Enberg , Tom Zanussi Subject: Re: [PATCH] relay: add buffer-only functionality, allowing for early kernel tracing Message-ID: <20080406042720.7a9bcbef@linux360.ro> In-Reply-To: <20080404164022.GA1762@Krystal> References: <20080404183303.2e239a20@linux360.ro> <20080404160623.GC32126@Krystal> <20080404191943.2d708cbf@linux360.ro> <20080404164022.GA1762@Krystal> X-Mailer: Claws Mail 3.3.0 (GTK+ 2.12.1; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 4 Apr 2008 12:40:22 -0400 Mathieu Desnoyers wrote: > As far as I am concerned, I can only merge this in the LTTng project > to try it. I've added Tom Zanussi, the author of relay, who might > have some ideas to share with us. I would wait until we have a more > precise idea of the API before I modify LTTng to start using it. > > Regards, > > Mathieu Hi, I've tested my patch a bit more and ran into a problem, and fixed it. Forget the old patch, it will panic the kernel if it has to cross sub-buffer boundaries. I'll polish the new one a bit (maybe update the docs) and resubmit, along with a piece of code from my GSoC project that uses the early relay interface (may provide an easy to try demo). Unfortunately, as for doing earlier than kmem_cache_init() tracing, I don't have the time right now, as I have to carry on with my GSoC project. I looked through the source more thoroughly and the needed changes are not trivial at all. I'm not saying I won't work on it, but it won't be a priority. By the way, I got a "delivery failure" message... is something wrong with Tom Zanussi's e-mail address? Google showed 2007 LKML entries with his e-mail address as . In any case, when I'll resubmit the patch, I'll add this other address in the Cc list. Or should we reach him another way? I'd like to get this merged as it is so far, and mailing it directly to akpm (or worse, Linus) doesn't sound like a good idea. Cheers, Eduard