Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933639AbZAPNLZ (ORCPT ); Fri, 16 Jan 2009 08:11:25 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758439AbZAPNLP (ORCPT ); Fri, 16 Jan 2009 08:11:15 -0500 Received: from mx3.mail.elte.hu ([157.181.1.138]:36455 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752931AbZAPNLO (ORCPT ); Fri, 16 Jan 2009 08:11:14 -0500 Date: Fri, 16 Jan 2009 14:10:51 +0100 From: Ingo Molnar To: =?iso-8859-1?Q?Fr=E9d=E9ric?= Weisbecker Cc: Steven Rostedt , linux-kernel@vger.kernel.org, Andrew Morton , Chris Mason Subject: Re: [PATCH 0/2] ftrace: updates to tip Message-ID: <20090116131051.GM5421@elte.hu> References: <20090116004050.273665842@goodmis.org> <20090116112345.GC20082@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1255 Lines: 37 * Fr?d?ric Weisbecker wrote: > 2009/1/16 Ingo Molnar : > > > > * Steven Rostedt wrote: > > > >> Ingo, > >> > >> The first patch is critical, and needs to stay with trace_output.c Not > >> that critical since trace_output.c is not in mainline yet. > >> > >> The second patch gives the ability to stack trace functions. I've been > >> leery about adding this and still keep it a separate option from the > >> "stacktrace" that already exists. This is because when enabled with no > >> filtering, the lag between typing and seeing what is typed can be up to > >> 10 seconds or more. > > > > Btw., is this true even if frame pointers are enabled? When frame pointers > > are disabled we scan the full kernel stack => that can be quite slow if > > every kernel function is traced ;-) > > > Hi Ingo, > > The function tracer selects Frame pointers :-) doh, i even added that to begin with ;-) Life is short but a coder's memory is even shorter. 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/