Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750799AbWIVG7a (ORCPT ); Fri, 22 Sep 2006 02:59:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750801AbWIVG73 (ORCPT ); Fri, 22 Sep 2006 02:59:29 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:28854 "EHLO mx2.mail.elte.hu") by vger.kernel.org with ESMTP id S1750799AbWIVG73 (ORCPT ); Fri, 22 Sep 2006 02:59:29 -0400 Date: Fri, 22 Sep 2006 08:49:55 +0200 From: Ingo Molnar To: Mathieu Desnoyers Cc: Martin Bligh , "Frank Ch. Eigler" , Masami Hiramatsu , prasanna@in.ibm.com, Andrew Morton , Paul Mundt , linux-kernel , Jes Sorensen , Tom Zanussi , Richard J Moore , Michel Dagenais , Christoph Hellwig , Greg Kroah-Hartman , Thomas Gleixner , William Cohen , ltt-dev@shafik.org, systemtap@sources.redhat.com, Alan Cox Subject: Re: [PATCH] Linux Kernel Markers 0.5 for Linux 2.6.17 (with probe management) Message-ID: <20060922064955.GA4167@elte.hu> References: <20060921160009.GA30115@Krystal> <20060921160656.GA24774@elte.hu> <20060921214248.GA10097@Krystal> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20060921214248.GA10097@Krystal> User-Agent: Mutt/1.4.2.1i X-ELTE-SpamScore: -2.9 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-2.9 required=5.9 tests=ALL_TRUSTED,AWL,BAYES_50 autolearn=no SpamAssassin version=3.0.3 -3.3 ALL_TRUSTED Did not pass through any untrusted hosts 0.5 BAYES_50 BODY: Bayesian spam probability is 40 to 60% [score: 0.4950] -0.1 AWL AWL: From: address is in the auto white-list X-ELTE-VirusStatus: clean Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 770 Lines: 21 * Mathieu Desnoyers wrote: > > "As an example, LTTng traces the page fault handler, when kprobes > > just can't instrument it." > > > > but tracing a raw pagefault at the arch level is a bad idea anyway, > > we want to trace __handle_mm_fault(). That way you can avoid having > > to modify every architecture's pagefault handler ... > > Then you lose the ability to trace in-kernel minor page faults. that's wrong, minor pagefaults go through __handle_mm_fault() just as much. 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/