From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761650Ab3JQSlV (ORCPT ); Thu, 17 Oct 2013 14:41:21 -0400 Received: from cdptpa-outbound-snat.email.rr.com ([107.14.166.226]:40154 "EHLO cdptpa-oedge-vip.email.rr.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1758245Ab3JQSlU (ORCPT ); Thu, 17 Oct 2013 14:41:20 -0400 Date: Thu, 17 Oct 2013 14:41:16 -0400 From: Steven Rostedt To: "Arend van Spriel" Cc: "linux-kernel@vger.kernel.org" Subject: Re: trace-cmd problem with FC19 Message-ID: <20131017144116.044f3aaf@gandalf.local.home> In-Reply-To: <525FD328.1040204@broadcom.com> References: <525FD328.1040204@broadcom.com> X-Mailer: Claws Mail 3.9.2 (GTK+ 2.24.20; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-RR-Connecting-IP: 107.14.168.142:25 X-Cloudmark-Score: 0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 17 Oct 2013 14:08:08 +0200 "Arend van Spriel" wrote: > Hi Steven, > > When tracing I get these error messages and no trace data is recorded. I > also cloned the trace-cmd repo and tried that with the same result. I > think the kernel configuration looks ok, but adding it. > > I use it almost daily on Ubuntu system, but trying Fedora for a change. > I do have a difference with kernel taint with my driver loaded: > > Ubuntu 4096 (OOT module loaded, ie. my driver) > Fedora 4098 (OOT *and* forced module?) > > 'forced module' probably caused by: > [10808.074823] Request for unknown module key 'Fedora kernel signing > key: 8661dbf3061bfa70eb76d61691cec200318534b4' err -11 > > Would that explain my issue? > > Regards, > Arend > > ---8<---------------------------------------------------- > $ sudo trace-cmd record -e brcmfmac:* > /sys/kernel/debug/tracing/events/brcmfmac/*/filter > Hit Ctrl^C to stop recording > ^Ctrace-cmd: Interrupted system call > trace-cmd: Interrupted system call > recorder error in splice inputrecorder error in splice input I haven't seen this before. Was the brcmfmac module the one that was forced loaded? Does recording other traces work? Or is it only spicific to this module? -- Steve > > trace-cmd: Interrupted system call > recorder error in splice input > trace-cmd: Interrupted system call > recorder error in splice input > Kernel buffer statistics: > Note: "entries" are the entries left in the kernel ring buffer and > are not > recorded in the trace data. They should all be zero. >