From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754469AbYLGF6A (ORCPT ); Sun, 7 Dec 2008 00:58:00 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753422AbYLGF52 (ORCPT ); Sun, 7 Dec 2008 00:57:28 -0500 Received: from cantor2.suse.de ([195.135.220.15]:46845 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752656AbYLGF5Y (ORCPT ); Sun, 7 Dec 2008 00:57:24 -0500 Date: Sat, 6 Dec 2008 21:48:40 -0800 From: Greg KH To: Jason Baron Cc: mingo@elte.hu, linux-kernel@vger.kernel.org, rostedt@goodmis.org Subject: Re: [rfc] [patch] hook tracer to dynamic debug Message-ID: <20081207054840.GA20541@suse.de> References: <20081205193928.GA3134@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20081205193928.GA3134@redhat.com> User-Agent: Mutt/1.5.16 (2007-06-09) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Dec 05, 2008 at 02:39:28PM -0500, Jason Baron wrote: > hi, > > Currently, the dynamic debug framework uses 'printk' for output. Here, > i've hooked the backend of the dynamic debug framework to the tracing > framework. This allows the dynamic debug output to be seaprated from the > system log, and allows for higher performance. Is this really an issue most of the time? I know logs can get full, but this seems like a bit of an overkill :) > I've implemented it as a compile time option, but a user might want to > be able to toggle b/w 'printk' and the tracer at run-time...other > ideas? Patch is against the -tip tree... It would have to be a run-time option if you want any distro to ever be able to enable this in their kernels. thanks, greg k-h