Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S946000AbdDTNhO (ORCPT ); Thu, 20 Apr 2017 09:37:14 -0400 Received: from mail.kernel.org ([198.145.29.136]:54384 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S943574AbdDTNhL (ORCPT ); Thu, 20 Apr 2017 09:37:11 -0400 Date: Thu, 20 Apr 2017 09:37:04 -0400 From: Steven Rostedt To: Tyrel Datwyler Cc: Michael Ellerman , Frank Rowand , Tyrel Datwyler , robh+dt@kernel.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, nfont@linux.vnet.ibm.com, mingo@redhat.com Subject: Re: [PATCH] of: introduce event tracepoints for dynamic device_node lifecyle Message-ID: <20170420093704.577f262d@gandalf.local.home> In-Reply-To: <90e008a7-0660-99b9-edbe-6bf146268ba8@gmail.com> References: <1492475525-10827-1-git-send-email-tyreld@linux.vnet.ibm.com> <58F6AA35.2040902@gmail.com> <87efwp6v4e.fsf@concordia.ellerman.id.au> <1d51a229-612b-bf09-93d5-6e43b476e2cf@gmail.com> <20170419223342.0bbe2593@grimm.local.home> <90e008a7-0660-99b9-edbe-6bf146268ba8@gmail.com> X-Mailer: Claws Mail 3.14.0 (GTK+ 2.24.31; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 965 Lines: 25 On Wed, 19 Apr 2017 22:24:58 -0700 Tyrel Datwyler wrote: > On 04/19/2017 07:33 PM, Steven Rostedt wrote: > > On Wed, 19 Apr 2017 16:27:10 -0700 > > Tyrel Datwyler wrote: > > > >> # echo stacktrace > /sys/kernel/debug/tracing/trace_options > >> # cat trace | grep -A6 "/pci@800000020000018" > > > > Just to let you know that there is now stacktrace event triggers, where > > you don't need to stacktrace all events, you can pick and choose. And > > even filter the stack trace on specific fields of the event. > > This is great, and I did figure that out this afternoon. One thing I was > still trying to determine though was whether its possible to set these > triggers at boot? As far as I could tell I'm still limited to > "trace_options=stacktrace" as a kernel boot parameter to get the stack > for event tracepoints. No not yet. But I'll add that to the todo list. Thanks, -- Steve