Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 18 Oct 2002 14:51:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 18 Oct 2002 14:51:45 -0400 Received: from nameservices.net ([208.234.25.16]:29722 "EHLO opersys.com") by vger.kernel.org with ESMTP id ; Fri, 18 Oct 2002 14:49:31 -0400 Message-ID: <3DB05A60.5D64425@opersys.com> Date: Fri, 18 Oct 2002 15:00:48 -0400 From: Karim Yaghmour Reply-To: karim@opersys.com Organization: Opersys inc. X-Mailer: Mozilla 4.79 [en] (X11; U; Linux 2.4.19 i686) X-Accept-Language: en MIME-Version: 1.0 To: frowand@mvista.com CC: linux-kernel , LTT-Dev Subject: Re: [ltt-dev] [ANNOUNCE] LTT 0.9.6pre2: Per-CPU buffers, TSC timestamps, etc. References: <3DAF850D.D104A6D@opersys.com> <3DB053C4.8458B0D8@mvista.com> Content-Type: text/plain; charset=iso-8859-15 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1606 Lines: 38 Frank Rowand wrote: > I noticed that the Linux 2.4.19 patch is not carried forward from > pre1 to pre2. Are you planning to no longer maintain support for > LTT in the Linux 2.4 line? The problem is that the kernel patch is highly dependent on the kernel's own development. The tracing infrastructure has to change as the kernel changes. Incidently, the user tools also have to change to accomodate the newer kernels. There's a point where keeping compatibility with older kernels becomes increasingly difficult and would entail one of two things: - Burden the user tools with legacy support. - Backport all new features to older kernels. Neither of these is really interesting. Of course, if someone wants to take the time to backport some of the new features to older kernels I would gladly publish their patch with the tools. The time it takes to work out an LTT patch is non-negligeable and I don't have the bandwidth to maintain multiple kernel patches in parallel. This is why I'm concentrating on getting LTT to work with the latest and greatest. Obviously things will be much simpler once the LTT patch is included in the kernel. Karim =================================================== Karim Yaghmour karim@opersys.com Embedded and Real-Time Linux Expert =================================================== - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/