From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, URIBL_BLOCKED,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B0CE1C43381 for ; Fri, 22 Mar 2019 13:48:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7C17B2175B for ; Fri, 22 Mar 2019 13:48:19 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=joelfernandes.org header.i=@joelfernandes.org header.b="wQ0F7MN/" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728544AbfCVNsS (ORCPT ); Fri, 22 Mar 2019 09:48:18 -0400 Received: from mail-pg1-f175.google.com ([209.85.215.175]:36077 "EHLO mail-pg1-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728005AbfCVNsR (ORCPT ); Fri, 22 Mar 2019 09:48:17 -0400 Received: by mail-pg1-f175.google.com with SMTP id r124so1578741pgr.3 for ; Fri, 22 Mar 2019 06:48:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=joelfernandes.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=AfG6ydgW6QAgdRu0lPyaYwrTA2PIAMVgtJGbLxqf6f8=; b=wQ0F7MN/BRC+grJ37+Jrxn5/Cc5NiddnHVQsU/qd4Rq35QlMy9QBnSd4ufaMb/P2b1 y49hKhVbf9/FiywuGsPKINPiGQgC5peD8b8pXI+KKYbLUGJ3Q7DfPaBgIZQNKs3xspfJ BlT8BacmP224TkrSI7ooDYsJ+QmhwQcNSCvr0= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=AfG6ydgW6QAgdRu0lPyaYwrTA2PIAMVgtJGbLxqf6f8=; b=jfoC+uWPEyQsrwLkC8lXIqRM0yANaqi2UCeRXGLGtq2OhFN9rf/fbFTMWxmGZr4z/u BmZYKPtcpnqoKUOVqX58TiKkKm6V7iNHXaHwrBxdT7makUL+qljzTX63HoadDUPsEymZ Xuz249CVhAQ5PZIkdpdVokwN0zxosZFIdvoAWXi3WiaH3p2H+ESAoix0bzAFsWPkqsoS h8+0M2nz5UHSxDdyEa+4P3sDySlf+bs6x924KySPsaWM3Og1RDjYUV7Udd52f3WUSHMl Y8v62SMjUoSMcz058SeepP8tZ6uzJsGFocwFV6HU1TffoaQdlDTDYstQ8jk/t9w1Gdjh 6XdA== X-Gm-Message-State: APjAAAWC0jYos950FrVLWno5TI+Oc2UblBt6IQVhAACz/5GXQ/9PQO23 Q1kpqpvFQWclsn4V731Otsp8yg== X-Google-Smtp-Source: APXvYqw0Q5ZfYsdTeFIMNNyM64OkLsokqKxBXQL11dXTJAFIGO56YvAn3xFE5h4t1cyz5p1AvOXjUQ== X-Received: by 2002:a63:f84d:: with SMTP id v13mr9074070pgj.384.1553262496814; Fri, 22 Mar 2019 06:48:16 -0700 (PDT) Received: from localhost ([2620:15c:6:12:9c46:e0da:efbf:69cc]) by smtp.gmail.com with ESMTPSA id j9sm13170269pfc.67.2019.03.22.06.48.15 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Fri, 22 Mar 2019 06:48:15 -0700 (PDT) Date: Fri, 22 Mar 2019 09:48:14 -0400 From: Joel Fernandes To: Steven Rostedt Cc: Mathieu Desnoyers , diamon-discuss@lists.linuxfoundation.org, lttng-dev , linux-kernel Subject: Re: [diamon-discuss] [RELEASE] LTTng-modules 2.9.11, 2.10.8, 2.11.0-rc2 (Linux kernel tracer) Message-ID: <20190322134814.GB56461@google.com> References: <60988959.4070.1541112982406.JavaMail.zimbra@efficios.com> <1199524058.2398.1553016874435.JavaMail.zimbra@efficios.com> <20190321124122.GA30542@google.com> <20190321091356.38a6988d@gandalf.local.home> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190321091356.38a6988d@gandalf.local.home> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Mar 21, 2019 at 09:13:56AM -0400, Steven Rostedt wrote: > On Thu, 21 Mar 2019 08:41:22 -0400 > Joel Fernandes wrote: > > > Also does it also make sense for lttng ring buffer to use the ftrace code for > > ring buffer, or make the ftrace ring buffer better and have lttng use it? Or > > is the lttng ring buffer design too radically different? > > We tried in the past and never actually got something that we both > could agree on. Now I believe the user space tools depend on the way > each one is, so to change one will break the tools that read it. I understand :-\ thanks, - Joel