Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755830AbZDVWWP (ORCPT ); Wed, 22 Apr 2009 18:22:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754845AbZDVWV5 (ORCPT ); Wed, 22 Apr 2009 18:21:57 -0400 Received: from BISCAYNE-ONE-STATION.MIT.EDU ([18.7.7.80]:53145 "EHLO biscayne-one-station.mit.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752553AbZDVWV4 (ORCPT ); Wed, 22 Apr 2009 18:21:56 -0400 Date: Wed, 22 Apr 2009 18:20:39 -0400 (EDT) From: Tim Abbott To: Ingo Molnar cc: Rusty Russell , Steven Rostedt , linux-kernel@vger.kernel.org, Andrew Morton , Thomas Gleixner , Peter Zijlstra , Frederic Weisbecker , Anders Kaseorg , Jeffrey B Arnold , Mathieu Desnoyers , Ananth N Mavinakayanahalli , Masami Hiramatsu Subject: Re: [PATCH 1/5] ftrace: use module notifier for function tracer In-Reply-To: <20090422091645.GB18226@elte.hu> Message-ID: References: <20090416021830.556671772@goodmis.org> <20090416021928.040177084@goodmis.org> <200904192055.04213.rusty@rustcorp.com.au> <20090422091645.GB18226@elte.hu> User-Agent: Alpine 1.10 (DEB 962 2008-03-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Spam-Flag: NO X-Spam-Score: 0.00 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1019 Lines: 23 On Wed, 22 Apr 2009, Ingo Molnar wrote: > I suspect ksplice could make use of text_mutex? Yes, this is what I was imagining. Thanks for pointing this out! I plan to make Ksplice use this for the next version of the Ksplice patch series. However, since Ksplice can be built as a module, we'll want to EXPORT_SYMBOL_GPL(text_mutex). The comment above text_mutex's definition suggests some people would prefer not to have modules patching the kernel text, and so this point might be contentious. I've found support for building Ksplice as a module to be a useful feature in case one needs to use multiple different versions of Ksplice on the same system (e.g. because the version built in to the kernel doesn't support a particular patch). -Tim Abbott -- 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/