Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755500AbaBTTEf (ORCPT ); Thu, 20 Feb 2014 14:04:35 -0500 Received: from cdptpa-outbound-snat.email.rr.com ([107.14.166.226]:32023 "EHLO cdptpa-oedge-vip.email.rr.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754166AbaBTTEe (ORCPT ); Thu, 20 Feb 2014 14:04:34 -0500 Date: Thu, 20 Feb 2014 14:04:26 -0500 From: Steven Rostedt To: Peter Zijlstra Cc: Andi Kleen , Vince Weaver , Dave Jones , Linux Kernel , Ingo Molnar , Paul Mackerras , Jiri Olsa Subject: Re: x86_pmu_start WARN_ON. Message-ID: <20140220140426.6d17001c@gandalf.local.home> In-Reply-To: <20140220181538.GK9987@twins.programming.kicks-ass.net> References: <20140217152859.GF15586@twins.programming.kicks-ass.net> <20140219101949.GG15586@twins.programming.kicks-ass.net> <20140220100830.GN6835@laptop.programming.kicks-ass.net> <87r46xdbw4.fsf@tassilo.jf.intel.com> <20140220155416.GH9987@twins.programming.kicks-ass.net> <87mwhld72w.fsf@tassilo.jf.intel.com> <20140220181538.GK9987@twins.programming.kicks-ass.net> X-Mailer: Claws Mail 3.9.3 (GTK+ 2.24.22; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-RR-Connecting-IP: 107.14.168.130:25 X-Cloudmark-Score: 0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 20 Feb 2014 19:15:38 +0100 Peter Zijlstra wrote: > I think by using the /debug/tracing/events/ftrace/function event, but > I'm not actually sure, I've never used it nor did I write the code to do > it. Jolsa did all that IIRC. > > All I know is that we had some 'fun' bugs around there sometime back. Note, the function tracer now has a lot better recursion protection than it use to. -- Steve -- 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/