From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753681AbYISLbH (ORCPT ); Fri, 19 Sep 2008 07:31:07 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751081AbYISLaz (ORCPT ); Fri, 19 Sep 2008 07:30:55 -0400 Received: from fg-out-1718.google.com ([72.14.220.158]:10720 "EHLO fg-out-1718.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750800AbYISLaz convert rfc822-to-8bit (ORCPT ); Fri, 19 Sep 2008 07:30:55 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version :content-type:content-transfer-encoding:content-disposition :references; b=k+8dBR+e5NpBkB0gcmuCex4cBpM4XlVqijtlTS86xljfoLpkvZo2l8uv8nGcgVFY5x GhMURS7JoxehaeQzPSbJtf4KgxirvuTKB6WBYKrm1kkHAtTJ34j0lS/gRxP9CyFunHIJ qXPoP99KWUi7cxYZ6laoHACBc8XHbQKEeVz+w= Message-ID: Date: Fri, 19 Sep 2008 13:30:53 +0200 From: "=?ISO-8859-1?Q?Fr=E9d=E9ric_Weisbecker?=" To: "Ingo Molnar" Subject: Re: [PATCH -tip FIXED] ftrace: add nop tracer Cc: "Steven Noonan" , linux-kernel@vger.kernel.org In-Reply-To: <20080919110449.GB30624@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Content-Disposition: inline References: <1221818803-9616-1-git-send-email-steven@uplinklabs.net> <20080919110449.GB30624@elte.hu> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 2008/9/19 Ingo Molnar : > > * Frédéric Weisbecker wrote: > >> It seems we have two "none" tracers now. Why not seeing this nop >> tracer as an improvment of the current "none tracer" ? >> >> As a result the none tracer contained in trace.c could be replaced by >> this new one as the default tracer. And that's said, that will enable >> trace_printk by default even when no tracer is selected by the user. >> >> What do you think about it? > > hmm ... good idea. There are some special properties of the none tracer > (it inhibits trace output for example), and those should be discontinued > i guess. > > Ingo > Ok. I will prepare a patch to submit this idea.