Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761306AbZLJSRu (ORCPT ); Thu, 10 Dec 2009 13:17:50 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760874AbZLJSRt (ORCPT ); Thu, 10 Dec 2009 13:17:49 -0500 Received: from mx2.mail.elte.hu ([157.181.151.9]:50686 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754000AbZLJSRt (ORCPT ); Thu, 10 Dec 2009 13:17:49 -0500 Date: Thu, 10 Dec 2009 19:16:38 +0100 From: Ingo Molnar To: "Frank Ch. Eigler" Cc: Peter Zijlstra , linux-kernel@vger.kernel.org, utrace-devel , Thomas Gleixner Subject: Re: [RFC] [PATCH] In-kernel gdbstub based on utrace Infrastructure. Message-ID: <20091210181638.GA17986@elte.hu> References: <20091130151650.GA24316@elte.hu> <20091130152910.GB10331@redhat.com> <20091201161132.GA24897@elte.hu> <20091201170002.GD10331@redhat.com> <20091201170954.GA4699@elte.hu> <20091201174534.GE10331@redhat.com> <20091201211518.GA32376@elte.hu> <20091208215829.GA19793@redhat.com> <20091210074158.GI16874@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-08-17) X-ELTE-SpamScore: 0.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=0.0 required=5.9 tests=none autolearn=no SpamAssassin version=3.2.5 _SUMMARY_ Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1386 Lines: 34 * Frank Ch. Eigler wrote: > > Ingo Molnar writes: > > > [...] Since the speed of development in this area is truly glacial > > at the moment and the practical advantages that i can experience > > personally (directly as a Linux user and indirectly as a maintainer) > > are miniscule so far, caution is warranted IMO. [...] > > If the "caution" you suggest is operationally equivalent to > discouraging even miniscule improvements, is it any wonder that > progress is glacial? I think you might be mixing up cause and causation ;-) > The gdbstub prototype was constructed for two reasons: to demonstrate > utrace usage now, and in the future to be incrementally useful (over > ptrace, by moving into fast kernel-space operations like > multithreading control, gdb-tracepoint support, other stuff). #1 is > about done. With respect to #2, we can certainly commit to ongoing > work on improvements, provided the community shows interest and > goodwill. What i'd like to see is measurable benefits to users, developers and maintainers. I'd like to see the same for SystemTap too btw. Ingo -- 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/